MD2 Variable Speed Drive Controllers

Operation and Maintenance Manual OM 844-1

Group: Rooftop Systems

Part Number: OM 844

Date: January 2007

MD2 Variable Speed Drive Controllers

Packaged Rooftop Units RPS, RFS, RDT, RPE, and RDE

Rooftop Air Handler Units RDS and RAH

Vertical Self-Contained Units SWP and SWT

Commercial Packaged Rooftop Units MPS 030 to 050 Tons

© 2007 McQuay International

Introduction.................................................................... 3

Applications With MicroTech II Control (A1a, A2, B1a,

B2, C, and D)............................................................ 4

Applications Without MicroTech II Controls (A1b and

B1b).......................................................................... 4

Replacement VFD .................................................... 4

Hazard Categories and Special Symbols ...................... 5

Before You Begin .......................................................... 6

Bus Voltage Measurement Procedure ..................... 7

Initial Start-Up........................................................... 8

Control Terminals .......................................................... 9

Switch Settings and Terminal Designations ................ 12

Integrated Display Terminal......................................... 13

Programming ............................................................... 15

Mode Access.......................................................... 15

Parameter Groups.................................................. 15

Access to Menus and Parameters ......................... 16

AUF Quick Menu....................................................... 17

AUF Quick Menu Parameters .............................. 18

Setting the Acceleration/Deceleration

Ramp Times ........................................................... 19

Setting the Macro Function .................................... 20

Setting the Mode of Operation ............................... 20

Command Mode Selection ..................................... 21

Frequency Mode Selection..................................... 21

Default Setting........................................................ 22

Forward/Reverse Run Selection ............................ 22

Maximum Frequency.............................................. 23

High Speed and Low Speed................................... 24

Nominal Motor Frequency and Voltage

Settings .................................................................. 24

V/Hz Control Mode Selection ................................. 25

Voltage Boost (Energy Recovery

Application Only) .................................................... 25

Electronic Motor Overload Protection..................... 26

Input Signal Selection ............................................ 28

Terminal Function Selection................................... 28

Jump Frequency (Jumping

Resonant Frequencies).......................................... 29

Switching Frequency.............................................. 30

Auto Restart ........................................................... 31

Drive Controller Fault Retention............................. 33

Output Phase Loss Detection ................................ 33

Input Phase Loss Detection ................................... 34

Avoiding Overvoltage Tripping ............................... 34

Undervoltage Fault................................................. 35

Changing the Display Parameter ........................... 36

Troubleshooting Fault and Alarm Codes..................... 37

Resetting the Drive Controller After a

Fault Condition ....................................................... 44

Appendix A—Input Terminal Functions....................... 45

Appendix B—Output Terminal Functions .................... 49

Appendix C—Receiving and Preliminary Inspection ... 53

Storing and Shipping.............................................. 53

Lifting and Handling ............................................... 54

Precautions ............................................................ 54

Appendix D—Wiring Recommendations ..................... 60

Power Terminals .................................................... 63

Appendix E—Wiring Diagrams and

Parameter Settings...................................................... 65

LL (Lower Limit Frequency) ................................... 65

MODE KEY (LOCAL or REMOTE Keypad) ........... 65

MPS Rooftop with MicroTech II Controls for SAF and

EAF Applications.................................................... 66

Rooftop and Self-Contained with MicroTech II Controls for SAF, RAF, and EAF Applications ..................... 69

Rooftop Controls by Others for SAF, RAF, and EAF

Applications............................................................ 72

Rooftop Energy Recovery Wheel Speed Control... 74

McQuay OM 844-1

Introduction

Introduction

This manual provides information about the McQuay MD2 variable speed drive (VFD) that was originally factory installed within a McQuay HVAC unit. The manual describes operation of the VFD along with descriptions and functions of the VFD parameters for the models and applications listed below.

Specific packaged equipment wiring schematics and parameter settings can be found

in Appendix E—Wiring Diagrams and Parameter Settings on page 65. Please refer to

the rooftop or self-contained installation manual and/or operation manual for information on the unit controller and its control of the variable speed drive.

A. Packaged Rooftop models RPS, RFS, RDT, RPE, and RDE

1. VFDs for supply, return and exhaust air fan speed control a. Units with Mircotech II control b. Units without Microtech II control

2. VFDs for energy recovery wheel speed control

B. Rooftop Air Handler models RDS and RAH

1. VFDs for supply, return and exhaust air fan speed control a. Units with Mircotech II control b. Units without Microtech II control

2. VFDs for energy recovery wheel speed control

C. Vertical Self-Contained models SWP and SWT, supply fan speed control

D. Commercial Packaged Rooftop Model MPS

1. For supply and exhaust air fan speed control

WARNING

UNINTENDED EQUIPMENT OPERATION

• Modifying or changing parameters whose function is not described in this manual will affect drive controller operation.

Some register changes will take effect as soon as they are entered.

• Do not modify or change parameters whose function is not described in this instruction bulletin.

Failure to follow this instruction can result in death, serious injury, or equipment damage.

3

4

Introduction

Applications With MicroTech II Control (A1a, A2,

B1a, B2, C, and D)

The variable speed drive has been selected and coordinated with the McQuay air conditioning equipment’s unit controller. The drive that is installed on the McQuay packaged equipment has the parameters modified for the HVAC application. For the standard HVAC system design, no further modifications should need to be made to the drive.

Applications Without MicroTech II Controls (A1b and B1b)

The McQuay variable speed drive parameters must be changed to coordinate the drive with the unit controls and the system it is being installed on. This manual describes the parameters that should be reviewed and adjusted. Other parameters should not be adjusted.

Replacement VFD

When replacing a VFD, the owner/installer must determine which of the above listed applications applies and follow the appropriate procedures within this manual.

McQuay OM 844-1

McQuay OM 844-1

Hazard Categories and Special Symbols

Hazard Categories and Special Symbols

Read these instructions carefully and look at the equipment to become familiar with the device before trying to install, operate, service, or maintain it. The following special messages may appear throughout this bulletin or on the equipment to warn of potential hazards or to call attention to information that clarifies or simplifies a procedure.

The addition of a lightning bolt or ANSI man symbol to a “Danger” or “Warning” safety label indicates that an electrical hazard exists which will result in personal injury if the instructions are not followed.

The exclamation point symbol is used to alert you to potential personal injury hazards.

Obey all safety messages that follow this symbol to avoid possible injury or death.

Symbol Name

Lightning Bolt

ANSI Man

Exclamation Point

DANGER

DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING

WARNING indicates a potentially hazardous situation which, if not avoided, can result in death, serious injury, or equipment damage.

CAUTION

CAUTION indicates a potentially hazardous situation which, if not avoided, can result in minor or moderate injury.

CAUTION

CAUTION, used without the safety alert symbol, indicates a potentially hazardous situation which, if not avoided, can result in property damage.

5

6

Before You Begin


Read and understand these instructions before performing any procedure on this drive controller.

DANGER

HAZARDOUS VOLTAGE

• Read and understand this manual before installing or operating the MD2 drive controller. Installation, adjustment, repair, and maintenance must be performed by qualified personnel.

• The user is responsible for compliance with all international and national electrical code requirements with respect to grounding of all equipment.

• Many parts of this drive controller, including the printed circuit boards, operate at the line voltage. DO NOT TOUCH. Use only electrically insulated tools.

• Before servicing the drive controller:

— Disconnect all power.

— Place a “DO NOT TURN ON” label on all power disconnects.

— Lock all power disconnects in the open/off position.

• DO NOT touch unshielded components or terminal strip screw connections with voltage present.

• DO NOT short across terminals PA/+ and PC/- or across the DC bus capacitors.

• Install and close all covers before applying power or starting and stopping the drive controller.

• Disconnect all power, including external control power that may be present, before servicing the drive controller. WAIT

10 MINUTES to allow the DC bus capacitors to discharge. Then

follow the DC bus voltage measurement procedure on page 7 to

verify that the DC voltage is less than 45 V. The drive LEDs are not accurate indicators of the absence of DC bus voltage.

Failure to follow these instructions will result in death or serious injury.

CAUTION

IMPROPER DRIVE CONTROLLER OPERATION

• If the drive controller is de-energized for a prolonged period, the performance of the electrolytic capacitors will be reduced.

• Once a year, apply power to the drive controller for at least

5 hours to restore the performance of the capacitors, then check its operation.

• If the drive has not been powered for more than a year, do not connect the drive controller to the line voltage. Gradually increase the voltage using an adjustable AC source.

Failure to follow these instructions can result in injury and equipment damage.

McQuay OM 844-1

McQuay OM 844-1


DANGER

AUTOMATIC RESTART ENABLED

• This drive controller can restart under fault conditions.

• Equipment must be shut down, locked out and tagged out to perform servicing or maintenance.

Failure to follow this instruction will result in death or serious injury.

Bus Voltage Measurement Procedure

Before working on the drive controller, turn it off and wait 10 minutes to allow the DC bus to discharge and then measure the DC bus voltage.

DANGER


Read and understand the precautions in “Before You Begin” on page 6 before performing this procedure.


The DC bus voltage can exceed 1,000 Vdc. Use a properly rated voltage-sensing device when performing this procedure. To measure the DC bus voltage:

1. Disconnect all power and wait 10 minutes to allow the DC bus to discharge.

2. Measure the voltage of the DC bus between the PA/+ and PC/– terminals to ensure that the voltage is less than 45 Vdc.

3. If the DC bus capacitors do not discharge completely, contact your local McQuay representative. Do not repair or operate the drive controller.

Figure 1: Capacitor Charging LED

Capacitor charging LED

RUN

PRG

MON

Loc

Rem

%

Hz

MODE

ENT

RUN STOP

7

8


Initial Start-Up

Before providing power to the VFD, refer to the appropriate unit installation/maintenance manual(s) listed below:

• IM 738 for packaged rooftops with air-cooled condensers (RPS, RFS, and RDT)

• IM 487 for rooftop air handlers (RDS and RAH)

• IM 791 for packaged rooftops with evaporative condensers (RPE and RDE)

• IM 708 for one-piece self-contained units

• IM 709 for modular self-contained units

Perform the following (RPS/RDT example) general procedures on the specific unit purchased (yours may differ slightly depending on the unit)

1. Before closing (connecting) the power disconnect switch, open (disconnect) the following unit control circuit switches: a. Turn system switch S1 to OFF b. Turn system switch S7 to OFF

2. Confirm duct static pressure sensor SPS1 is connected to the ductwork.

3. Confirm the VFD lugs for the line voltage are tight.

4. Confirm the horsepower (hp) of the drive matches that of the motor.

Before starting the fan and VFD

1. Close the unit disconnect switch. With the control system switch S1 in the OFF position, power should be available only to the control circuit transformer (TI) and the compressor crankcase heaters.

2. Turn the Switch S1 to ON. Power should now be supplied to the control panel, and the LEDs on MCB1 should follow the normal startup sequence (refer to the “MCB

LED Power-Up Sequence” of IM 696).

3. Verify all duct isolation dampers are open. Unit mounted isolation dampers may be mounted in the supply or return sections.

4. Place the unit into the “Fan Only” mode through the keypad menu System

Summary\System\Ctrl Mode= Fan Only.

5. Confirm the power supply matches the setting of the J7J parameter.

6. Confirm the power supply frequency matches that of the J7 parameter.

7. Confirm the thermal protection level, tHr (or amps), matches that of the motor.

NOTE: All of the above parameters can be quickly found in the AUF Quick menu.

Start the fan and VFD

1. Turn Switch S7 to ON. The controller should enter the “Startup Initial” operating state. If the fan does not run: a. Check fuses F1 and F3.

b. Check that the manual motor protectors or circuit breakers have not tripped.

c. Check the optional phase monitor.

2. If the fans are equipped with optional spring isolators, check the fan spring mount adjustment. When the fans are running they should be level.

3. Verify the rotation is correct.

4. Verify the DHL safety is opening at a pressure compatible with duct working pressure limits.

NOTE: Refer to the unit IMs for additional non-VFD instructions.

McQuay OM 844-1

McQuay OM 844-1

Control Terminals


The control terminals are illustrated in Figure 2 (refer to Appendix E—Wiring

Diagrams and Parameter Settings for more details).

Figure 2: Control Terminals

SW4

SOURCE

PLC

SINK

SW4

F

PLC P24 CC

R RES FM

FLA FLB FLC R Y RC

Factory settings:

FM VIA

V

I

V

I

SW2 SW3

•

•

SW4:

FM:

VIA:

SOURCE side

(positive)

V side

V side

Maximum wire size: 2.5 mm²

(AWG 14)

Tightening torque: 0.6 Nm

(5.3 lb.in)

PP VIA VIB CC

Connector (RJ45)

DANGER


• The accidental grounding of logic inputs configured for Sink Logic can result in unintended activation of drive controller functions.

• Protect the signal conductors against damage that could result in unintentional conductor grounding.

• Follow NFPA 79 and EN 60204 guidelines for proper control circuit grounding practices.


WARNING

RISK OF IMPROPER OPERATION

The MD2 logic input selector switch (SW4) is factory-set to the source position. The switch should never be moved to the PLC or sink position.

Failure to follow this instruction can result in death or serious injury.

9


Table 1: Control Terminal Characteristics

Terminals Function

PLC

P24

CC

FLA,

FLB,

FLC

Characteristics

External power supply input

+24 Vdc input for external power supply for logic inputs

Max. permissible voltage: 50 Vac

Short-circuit and overload protection:

Internal supply

Common

24 Vdc supply (min. 21 V, max. 27 V), maximum current:

200 mA

0 V common (2 terminals)

One relay logic output, one N/C contact, and one N/O contact with common point

Minimum switching capacity: 3 mA for 24 Vdc

Maximum switching capacity:

•

•

On resistive load: 5 A for 250 Vac or 30 Vdc

On inductive load: 2 A for 250 Vac or 30 Vdc

Configurable relay outputs

Max. response time: 7 ms ± 0.5 ms

Electrical service life: 100,000 operations

One relay logic output, one N/O contact

Minimum switching capacity: 3 mA for 24 Vdc

Maximum switching capacity:

RY, RC

F

R

RES

FM

PP

Logic inputs

Analog output

Internal supply available

•

•

On resistive load: 5 A for 250 Vac or 30 Vdc

On inductive load: 2 A for 250 Vac or 30 Vdc

Max. response time: 7 ms ± 0.5 ms

Electrical service life: 100,000 operations

Three programmable logic inputs, 24 Vdc, compatible with level 1 PLC, IEC 65A-68 standard

Impedance: 3.5 k

Ω

Maximum voltage: 30 V

Max. sampling time: 2 ms ± 0.5 ms

Multiple assignment makes it possible to configure several functions on one input

Positive logic (Source): State 0 if

≤ 5 V or logic input not wired, state 1 if

≥ 11 V

Negative logic (Sink): State 0 if

≥ 16 V or logic input not wired, state 1 if

≤ 10 V

One switch-configurable voltage or current analog output:

•

•

Voltage analog output 0–10 Vdc, minimum load impedance 470

Ω

Current analog output X–Y mA by programming X and Y from 0 to

20 mA, maximum load impedance: 500

Ω


Resolution: 10 bits

Accuracy: ± 1% for a temperature variation of 60°C

Linearity: ± 0.2%

Short-circuit and overload protection:

One 10.5 Vdc ± 5% supply for the reference potentiometer (1 to 10 k

Ω), maximum current: 10 mA

10 McQuay OM 844-1


Table 1: Control Terminal Characteristics

(continued)


VIA

VIB

Characteristics

Switch-configurable voltage or current analog input:

Analog/logic input

•

•

Voltage analog input 0–10 Vdc, impedance 30 k

Ω (max. safe voltage: 27 Vdc +/- 3 Vdc)

Analog current input X–Y mA by programming X and Y from 0 to

20 mA, with impedance 242

Ω


Resolution: 11 bits

Accuracy: ± 0.6% for a temperature variation of 60°C

Linearity: ± 0.15% of the maximum value

Analog input Voltage analog input:

•

•

•

•

•

0–10 Vdc, impedance 30 k

Ω (max. safe voltage 27 Vdc)


Resolution: 11 bits

Accuracy: ± 0.6% for a temperature variation of 60°C

Linearity: ± 0.15% of the maximum value

McQuay OM 844-1 11

Switch Settings and Terminal Designations

Switch Settings and Terminal Designations

Figure 3: Switches

Voltage/current selection for analog I/O (FM and VIA)

Selection of logic type

SW4

Source

(positive logic)

PLC

Sink

(negative logic)

SW4

FM VIA

V (voltage)

V (voltage)

I (current)

SW2 SW3

I (current)

NOTE: Refer to Appendix E—Wiring Diagrams and Parameter Settings on page 65 for your

specific HVAC application and switch settings.

NOTE: The logic input switch SW4 is set to the source position. The switch should never be moved to the PLC or sink position.

DANGER






Table 2: Drive Controller Default Terminal Function Assignments

Terminal

FLA-FLB-FLC relay

RY-RC relay

F

R

RES

VIA

VIB

FM

Function

De-energized in the event of a fault or when the power supply is disconnected

Energized when the speed is greater than or equal to low speed (LL)

Forward (2-wire control)

Preset speed

Fault reset

Speed reference 0-10 Vdc

Not assigned

Output frequency

12 McQuay OM 844-1

McQuay OM 844-1

Integrated Display Terminal


The LEDs and keys on the integrated display terminal are illustrated in Figure 4.

Figure 4: Description of Display Terminal

1

2

3

4

5

RUN

PRG

MON

%

Hz

12

13

6

7

Loc

Rem

RUN STOP

MODE

ENT

8

9

10

11

14

NOTE: Display terminal functions described above reflect VFD default settings.

Table 3: Display Terminal Features

LED/Key Characteristics

1

2

Display RUN LED

Display PRG LED

3 Display MON LED

4

5

Display unit

Display unit LED

•

•

Illuminates when a run command is applied to the drive controller

Flashes when there is a speed reference present

•

•

•

•

Illuminates when Adjustment mode is active

Flashes in AUF–Gr.U modes

Illuminates when Monitoring mode is active

Flashes in fault record display mode

Four digits, seven segments

•

•

The % LED illuminates when a displayed numeric value is a percentage

The Hz LED illuminates when a displayed numeric value is in hertz

Depending on the mode, you can use the arrows to:

6

7

8

9

Navigation arrows

Arrow LED

Loc/Rem LED

Mode

10 Loc/Rem key

11 ENT

12 RUN LED

•

•

•

•

•

•

Navigate between the menus

Change a value

Change the speed reference when the Arrow LED (7) is lit

Illuminates when the navigation arrows are controlling the speed reference

Illuminates when Local mode is selected

Press to select the Mode (see Figure 5)

Display mode (default)

Adjustment mode

Monitoring mode

Can also be used to go back to the previous menu

Switches between Local and Remote modes

Press to display a parameter’s value or to save a changed value

Illuminates when the Run key is enabled

13


Table 3: Display Terminal Features

(continued)

LED/Key

13 RUN

14 STOP

Characteristics

Pressing this key when the RUN LED is illuminated starts the drive controller

Stop/reset key

In Local mode (see table item #10), pressing the STOP key decelerates the drive to a stop

In Remote mode (see table item #10), while the VFD is being controlled by the unit controller, pressing the STOP key will allow the drive to freewheel stop (drive display will indicate a flashing “E”)

If F735 is set to 0 (default setting), pressing the stop key twice will reset the flashing “E” fault and other resettable faults if the fault condition has been resolved

DANGER

STOP BUTTON CAN CAUSE MOTOR RESTART

• The Stop Button on this drive controller can reset faults and restart the motor if an active run command is present.

• Disable all run commands and inspect the drive system for the cause of the fault before activating a fault reset.

• Disable the panel reset operation (F735) to remove this hazard.


14 McQuay OM 844-1

McQuay OM 844-1

Programming

Programming

Mode Access

MD2 drive controllers have three modes of operation described in Table 4.

Table 4: Mode Descriptions

Display mode

(default)

•

•

Active when power is applied to the drive controller

Use to display drive controller parameters, alarms, and faults

Adjustment mode

•

Use to modify drive controller parameters

Monitoring mode

•

Use to monitor drive controller status

Figure 5 illustrates how to access the modes with the display terminal MODE key.

Figure 5: Mode Access

RUN

Display mode

(default)

60.0

MODE

PROG

Adjustment mode

AUF

MODE

MON

Monitoring mode

Fr-F

MODE

Parameter Groups

MD2 drive controllers are factory programmed per your HVAC application (refer to

Appendix E—Wiring Diagrams and Parameter Settings for your application options

and settings).To restore McQuay factory settings, use parameter “tYp” (see Default

Setting on page 22).

WARNING


• Any parameter values altered from the VFD control panel will affect the operation of the drive.

• If parameter “ tYp ” is selected and changed, altered parameters will be transferred into the VFD memory and may affect safe operation of the equipment.


Table 5: MD2 Parameter Groups

Parameter Type Description

Basic parameters Parameters that need validation before using the drive controller.

Extended Parameters

(menu F---)

User Parameters (menu

Gr.U.)

Parameters for special settings and applications.

Subset of Basic and Extended parameters whose values have changed from the VFD default settings.

Quick menu (menu AUF) Subset of Basic and Extended parameters frequently used.

History Parameters (menu

AUH)

Subset of Basic and Extended parameters displaying the five parameters that were last changed, displayed in reverse chronological order.

15

Programming

16

Access to Menus and Parameters

Figure 6 illustrates how to access menus.

Figure 6: Menu Access

Display

Mode

RUN

60.0

MOD

Adjustment

Mode

PROG

AUF

MOD Monitoring

Mode

Fr-F

MOD

AUH

GrU

F---

Basic

Parameters

AUF

AU1

Figure 7: Access to Parameters

AU1

ENT

AUF ACC

ENT dEC

10.1

NOTE: Press the MODE key to go back to the previous level.

For example:

— To go from 9.9 to

dEC

— To go from dEC to

AUF

10

LL

9.9

ENT

Confirm value

McQuay OM 844-1

McQuay OM 844-1

AUF Quick Menu

AUF Quick Menu

Figure 8 illustrates the parameters accessible from the AUF Quick menu.

Figure 8:

AUF Quick Menu Parameters

HEAD

Top of list

Automatic ramp adaptation

AUF

ENT

AU1

ACC

Acceleration ramp times dEC

Deceleration ramp times

LL

UL tHr

FN

Pt uL uLu

END

Minimum motor frequency

Maximum motor frequency

Motor thermal protection

Analog output scaling

Motor control profile

Nominal motor frequency

Nominal motor voltage

End of list

17

AUF Quick Menu


Table 6 describes the parameters that can be accessed from the AUF Quick menu.

With the exception of ACC and dEC, the parameters cannot be modified while the drive controller is running.

Table 6:


Code Description Unit Adjustment Range

ACC Acceleration time dEC Deceleration time

LL

Frequency lower limit (minimum motor frequency)

UL tHr

FN

Frequency upper limit (maximum motor frequency)

Motor electronic thermal protection level in amperes.

Adjust tHr to the nominal current value which appears on the motor nameplate.

Analog output scaling

Seconds

Seconds

Hz

Hz

A

0.0 to 3200

0.0 to 3200

0.0 to uL

0.5 to 200.0

0.1 to 1 times In

1

Pt

Selection of Volts/Hz control mode (motor control profile)

—

—

Do not use

0: V/Hz profile constant torque

1: V/Hz profile variable torque

2: Automatic voltage boost

3: Flux vector control

4: Energy saving

6: Permanent magnet synchronous motor uL

Base frequency (nominal motor frequency)

Hz 25 to 200.0

1 uLu

Voltage at base frequency

(nominal motor voltage)

V

50 to 330 (230 V drive controllers)

50 to 660 (460 V drive controllers)

In is the nominal drive current shown on the drive controller nameplate.

NOTE: With the exception of

ACC

and

dEC

, the parameters cannot be modified while the drive controller is running.

18 McQuay OM 844-1

McQuay OM 844-1

AUF Quick Menu

Setting the Acceleration/Deceleration

Ramp Times

-<$

Acceleration/deceleration ramp adaptation. Automatically adjusts the acceleration/deceleration ramp times to match the inertia of the load.

-//

Programs the time it takes for the drive controller output frequency to go from

0 Hz to the maximum frequency (parameter FH).

@1/

Programs the time it takes for drive controller output frequency to go from maximum frequency (parameter FH), to 0 Hz.

Table 7: Setting Ramp Time Parameters

Parameter Name

AU1

ACC dEC

Range

Automatic

Acceleration/

Deceleration Ramp

Adaptation

0: Disabled

1: Automatic

2: Automatic acceleration only

(Do not use)

Acceleration Time 1 0.0 to 3200 s

Deceleration Time 1 0.0 to 3200 s

See Appendix E—Wiring Diagrams and Parameter Settings on page 65 for McQuay

settings.

Acceleration/Deceleration Ramp Adaptation

• AU1 = 0: Function is disabled.

• AUI = 1: Automatically adjusts the acceleration and deceleration ramp times from 1/8–8 times the value set in the ACC or dEC parameters, depending on the current rating of the drive controller.

• AUI = 2: Do not use.

Figure 9: Automatic Ramp Adaptation

Output frequency (Hz)

FH

When load is small ...


FH

When load is large ...

0

Acceleration

Time

Deceleration

Time shorten acceleration/deceleration time.

Time

(seconds)

0

Acceleration

Time

Deceleration

Time lengthen acceleration/deceleration time.

Time

(seconds)

19

AUF Quick Menu

20

Manually Setting Acceleration/Deceleration Ramp Times

During startup, confirm parameters ACC and dEC match the parameters in

Appendix E—Wiring Diagrams and Parameter Settings.

Figure 10: Manually Setting the Acceleration/Deceleration Ramp Times


FH

AUI

=

0

(Manual)

0

Time (seconds)

ACC dEC

Setting the Macro Function

-<'

Sets the drive controller to one of four macro configurations. The macro configuration selection automatically determines the settings of the following parameters: CMOd, FMOd, F110–F113, and F201.

Table 8:

Parameter AU4

Parameter Name

AU4 Macro Function

Range (refer to Appendix E—Wiring

Diagrams and Parameter Settings for

values)

0: Disabled

1: Freewheel stop

2: 3-wire operation

3: + - speed from logic input(s)

4: 4–20 mA current input operation

NOTE: The current setting of this parameter is shown on the left side of the display. The number

0 is always displayed on the right. For example,

$ #

indicates that the freewheel stop setting is enabled.

Setting the Mode of Operation

In Remote mode, start and stop commands and the frequency are determined by the settings of CMOd (Command mode) and FMOd (Frequency Setting mode).

When Local mode is selected with the

LOC

REM

key, start/stop commands and frequency settings can only be made from the display terminal. The Local LED illuminates while

Local mode is selected. See page 13 for Local/Remote key operation and Local LED.

When service is complete, return the VFD to the remote mode.

WARNING





Failure to follow this instruction can result in death or serious injury.

McQuay OM 844-1

McQuay OM 844-1

AUF Quick Menu

Command Mode Selection

CNOd

Specifies which command source has priority in issuing Start and stop commands.

NOTE: You must stop the drive controller before changing the setting of

CMOd

.

Table 9:

Parameter CMOd

Parameter Name

CNOd

Command Mode

Selection

Range

0: Terminal board

1: Display terminal

2: Serial communication

• CMOd = 0: Start and stop commands via the logic inputs on the control terminal board.

• CMOd = 1: The controller.

and keys on the display terminal start and stop the drive

• CMOd = 2: The serial link sends start and stop commands to the drive controller.

Some functions, when assigned to an input terminal, are commanded by the input terminal even if CMOd is set to 1 (display terminal).

Priority commands via a serial link can take precedence over the setting of CMOd.

Frequency Mode Selection

289@

Specifies which input device has priority in issuing a speed reference command.

Table 10: Parameter FMOd

Parameter Name

FNOd

Frequency Mode

Selection

Range

1: VIA

2: VIB (not used with McQuay controls)

3: Display terminal

4: Serial communication (not used with McQuay controls)

5: +/- speed from logic input(s)


FMOd

. Preset speed operation is allowed with all settings of

FMOd

.

• FMOd = 1: Speed Reference command via analog input terminal VIA (0-10 Vdc or 4-20 mAdc).

• FMOd = 2: Speed Reference command via analog input terminal VIB (0-10 Vdc)

- not used with McQuay controls.

• FMOd = 3: Speed reference via the terminal or the optional remote keypad.

and arrow keys on the display

• FMOd = 4: Speed reference via serial communication link - not used with

McQuay controls.

• FMOd = 5: Speed reference from +/- speed from logic input(s)

21

AUF Quick Menu

22

Default Setting

tYp

This parameter provides a variety of functions to reset, restore and save parameter settings.

WARNING


• Drive controller default parameter settings will be substituted for the present settings when value 3 (standard default settings) of the tYP parameter is selected.

• Drive controller default parameter settings may not be compatible with the application.

• Contact McQuay product support before initiating standard default settings.

Failure to follow these instructions can result in death, serious injury, or equipment damage

Table 11: Parameter tYP

Parameter Name

tYp Default Setting

Range

0:

1: 50 Hz default

2: 60 Hz default

3: Standard default settings (Initialization)

4: Clear the fault record

5: Clear the cumulative operation time

6: Initialize the type information

7: Save the user-defined parameters (do not use)*

8: Recalls your McQuay defined parameters

9: Clear the cumulative fan operation time

* You may replace McQuay parameters if this is used.


tYP

.

NOTE: The following parameters are not affected by settings 1, 2, and 3:

FN

,

FNSL

,

F109

,

F470 F473

, and

F880

.

NOTE: The setting display of this parameter contains two numbers. The left-most number displays the last operation performed. The right-most number indicates the pending operation and should be adjusted for the action desired.

Forward/Reverse Run Selection

Fr

Programs the direction of motor rotation when starting the drive from the keypad display.

Table 12: Parameter 2H

Parameter Name

Fr

Forward/

Reverse Run

Selection

Range

0: Forward run

1: Reverse run (do not use)

2: Forward run with forward/ reverse switching (do not use)

3: Reverse run with forward/reverse switching (do not use)

NOTE: For more information, contact your McQuay representative.

McQuay OM 844-1

McQuay OM 844-1

AUF Quick Menu

Maximum Frequency

FH

Programs the maximum output frequency of the drive controller. This value is used as the maximum frequency reference for the acceleration and deceleration ramps.

CAUTION


• Do not use above 60Hz.

Failure to follow this instruction can result in equipment damage.

Table 13: Parameter FH

Parameter Name

FH

Maximum

Frequency

Range

30–200 (Hz)


FH

.

Figure 11: Maximum Frequency


80 Hz

60 Hz

When

FH = 80 Hz

When

FH = 60 Hz

0 100 % Frequency setting signal (%)

NOTE:

FH

can not be adjusted during operation

NOTE:

UL

value can not exceed

FH

value.

23

AUF Quick Menu

24

High Speed and Low Speed

UL

LL

Programs the high speed.

Programs the low speed.

Table 14: Parameters UL and LL

Parameter Name

UL

LL

High Speed

Low Speed

Range

0.5–FH (Hz)

0.0–UL (Hz)

Figure 12: High speed and low speed

High Speed

Output frequency (Hz) uL


0 100 %

Speed Reference signal

Low Speed

LL

0

100 %

Speed Reference signal

Nominal Motor Frequency and Voltage

Settings

J7

, J7J

Use these parameters to set the nominal motor frequency (uL) and voltage settings (uLu) to the motor nameplate values.

Table 15: Parameters J7 and J7u

Parameter Name

uL

Nominal Motor

Frequency

Range

25.0–200.0 Hz uLu

Voltage Setting

50.0–330 V: 200 V Class

50.0–660 V: 400 V Class

Figure 13: Nominal motor frequency and voltage settings

uLu

0

Output frequency uL

McQuay OM 844-1

McQuay OM 844-1

AUF Quick Menu

V/Hz Control Mode Selection

Pt

Use this parameter to set the V/Hz control mode.

Table 16: Parameter Pt

Parameter Name

:I

V/Hz Control Mode

Selection

Range

0: V/Hz constant (do not use)

1: Variable torque

2: Automatic voltage boost control

3: Vector control (do not use)

4: Energy saving (do not use)

5: No assignment (do not use)

6: PM motor control (do not use)

Voltage Boost (Energy Recovery

Application Only)

ub

Use this parameter to increases the voltage boost rate. This function is useful for applications where the torque is not adequate at low speeds.

Table 17: Parameter ub

Parameter Name

ub

Voltage Boost

Figure 14: Voltage Boost

Range

0.0–30.0% uLu ub

0

Output frequency (Hz) uL

V/Hz Control Mode (Pt) must be set to 0 (V/Hz constant) or 1 (variable torque) to use this function.

The optimum setting for Voltage Boost depends on the drive controller capacity.

Increasing Voltage Boost too much can cause the drive controller to fault on an overcurrent at start up.

25

AUF Quick Menu

Electronic Motor Overload Protection

tHr

Motor rated current value (FLA)

OLN

Electronic motor overload characteristics

F632

Electronic motor overload memory

These parameters must be set to match the rating and characteristics of the motor

(refer to the motor nameplate, full load amps).

Table 18: Electronic Thermal Protection Parameter Settings

1

Parameter Name

tHr

OLN

Motor Electronic

Thermal Protection

Electronic Thermal

Protection

Characteristic

Adjustment Range

0.1–1.0 In.

1

Set to the rated current indicated on the motor nameplate.

Setting Value

Overload

Protection

Overload

Stall

0

1

2

3

4

Self

Cooled

Motor

Enabled Disabled

Enabled Enabled

Disabled Disabled

Disabled Enabled

Enabled Disabled

(do not use)

5

Enabled Enabled

(do not use)

6

Forced

Cooled

Motor

Disabled Disabled

(do not use)

7

Disabled Enabled

(do not use)

F632

Electronic Motor

Thermal State

Memory

0: Disabled

1: Enabled

“In.” corresponds to the drive rated current indicated on the drive controller nameplate.

CAUTION

MOTOR OVERHEATING

This drive controller does not provide direct thermal protection for the motor. Use of a thermal sensor in the motor may be required for protection at all speeds and load conditions. Consult the motor manufacturer for thermal capability of the motor when operated over the desired speed range.

Failure to follow this instruction can result in injury or equipment damage.

26 McQuay OM 844-1

McQuay OM 844-1

AUF Quick Menu

Setting tHr, and OLM

Use electronic thermal protection characteristics (OLM) to enable or disable the motor overload fault function (97%) and the overload stall function.

While the drive controller overload fault (OL1, see page 26) is always enabled, motor overload fault (97%) can be selected using parameter OLM.

Overload stall is used with variable torque loads such as fans, pumps, and blowers, in which the load current decreases as the operating speed decreases. When the drive controller detects an overload, overload stall automatically lowers the output frequency before the motor overload fault, OL2, is activated. This function maintains the motor at frequencies that allow the load current to remain balanced so that the drive controller can continue operation without tripping.

NOTE: Do not use overload stall with constant torque loads such as conveyor belts in which load current is fixed with no relation to speed.

Self Cooled Motors

To set electronic thermal protection characteristics, OLM, for a self-cooled motor, refer to Table 18.

If the capacity of the motor is smaller than the capacity of the drive controller, or the rated current of the motor is smaller than the rated current of the drive controller, set the electronic thermal protection level, tHr, to the motor's nominal rated current value.

Figure 15: Motor Electronic Thermal Protection:

Self-cooled motor

Output current factor

(%)/(A) tHr x 1.0

tHr x 0.55

0

30 Hz Output frequency (Hz)

Motor Electric Thermal Protection Retention, 2)&%

The setting of this parameter determines whether electric thermal calculation values are retained when power is removed. Enabling the parameter (F632 = 1) causes the electric thermal calculation values to be retained when power is removed.

NOTE: For installations to meet Article 430 of the National Electric Code, parameter F632 must be set to 1.

27

AUF Quick Menu

Input Signal Selection

2$#,

VIA terminal function selection

This parameter allows you to select an analog or digital input for the VIA terminal.

Table 19: Parameter F109

Parameter Name

F109

Range

Analog/Digital Input

Function Selection

(VIA Terminal)

0: Analog input

1: Do not use (sinking input assignment)

2: Digital (sourcing) input

When using the VIA terminal as a digital input terminal, set the VIA slide switch to the

V position. For switch location see Figure 2.

DANGER






Terminal Function Selection

Modifying Input Terminal Functions

Table 20: Parameters F110, F111, F112, F113, and F118

Terminal

Symbol

Parameter Name Range

—

F

R

RES

VIA

F110

F111

F112

F113

F118

Always-Active Function (the control input function assigned to this parameter will always be active).

Logic Input

Logic Input

Logic Input

Input Terminal

0–71

(refer to Appendix E—

Wiring Diagrams and

Parameter Settings)

The functions selected with parameters F110 are always active.

28 McQuay OM 844-1

McQuay OM 844-1

AUF Quick Menu

Modifying Output Terminal Functions

2$&#

Output terminal selection 1A (RY-RC)

Figure 16: Application Example

Function of RY-RC:

Can be set using parameter F130

RY

RY

RC

Table 21: Assigning One Function to an Output Terminal

Terminal

Symbol


RY-RC

F130

Output Terminal

Selection 1A

0–255

(Refer to Appendix

E—Wiring Diagrams and Parameter

Settings on page 65,

for McQuay settings)

Jump Frequency (Jumping

Resonant Frequencies)

2%*#

Jump Frequency 1

2%*$

Jumping Width 1

2%*%

Jump Frequency 2

2%*&

Jumping Width 2

2%*'

Jump Frequency 3

2%*(

Jumping Width 3

Resonance due to the natural frequency of the mechanical system can be avoided by jumping the resonant frequency during operation.

Figure 17: Jump Frequency Timing Diagram

Output command frequency

(Hz)

Jump frequency 3 (

F274)

Jumping width 3 (

F275)

Jump frequency 2 (

F272)

Jumping width 2 (

F273)

Jump frequency 1 (

F270)

0

Jumping width 1 (

F271)

Frequency setting signal

29

AUF Quick Menu

Table 22: Jump Frequency Parameter Setting


F270

F271

F272

F273

F274

F275

Jump Frequency 1

Jump Width 1

0.0–FH (Hz)

0.0–30.0 (Hz)

Jump Frequency 2 0.0–FH (Hz)

Jump Width 2 0.0–30.0 (Hz)

Jump Frequency 3 0.0–FH (Hz)

Jump Width 3 0.0–30.0 (Hz)

NOTE: The jump frequency plus jump width may not overlap another jump frequency plus jump width.

NOTE: During acceleration or deceleration, the jumping function is disabled for the operation frequency.

Switching Frequency

2&##

Switching Frequency

2&$%

Random Mode

The F300 parameter allows the audible noise from the motor to be changed by altering the switching frequency.

In addition, the F300 parameter reduces the electromagnetic noise generated by the drive controller. Decrease the switching frequency to reduce electromagnetic noise.

NOTE: Although the electromagnetic noise level is reduced when decreasing switching frequency, the acoustic noise of the motor is increased.

The F312 parameter (random mode) reduces motor electromagnetic and acoustic noise by changing the pattern of the switching frequency.

Table 23: Parameters F300, F312

Parameter Name

F300

F312

Range

Switching Frequency 6.0–16.0 (kHz)

Random Mode

0: Disabled

1: Enabled

30 McQuay OM 844-1

McQuay OM 844-1

AUF Quick Menu

Auto Restart

2&#&

Select the number of restarts

DANGER

AUTOMATIC RESTART ENABLED

• This drive controller can restart under fault conditions.

• Equipment must be shut down, locked out and tagged out to perform servicing or maintenance.


This parameter resets the drive controller automatically if it is in an alarm state.


Parameter Name

F303 Number of Restarts

Range

0: Disabled

1–10: 1 to 10 restarts

Table 25: Causes of Tripping and Corresponding Restart Processes

Cause of

Tripping

Restart Process Canceling Conditions

Momentary power failure

Overcurrent

Overvoltage

Overload

Overheating

Up to 10 restarts in succession

1st restart: 1 second after tripping

2nd restart: 2 seconds after tripping

3rd restart: 3 seconds after tripping

10th restart: About 10 seconds after tripping

Auto restart is possible only after the following faults: momentary power failure, overcurrent, overvoltage, or overload.

The restart function will be canceled if restarting is not successful within the specified number of times.

Restart is disabled when the faults or errors listed in Table 26 occur.

OCA

OCL

EPHO

OH2

Ot

E

UC

UPI

EF2

EPH1

EtYP

Err2

Err3

Err4

Table 26: Faults Which Cannot Be Automatically Reset

Motor overcurrent at start up

Overcurrent on load side at start up

Output phase loss

External thermal fault

Overtorque fault

External fault stop

Low-current operation fault

Undervoltage fault (main circuit)

Ground fault

Input phase loss

Drive controller error

Main unit RAM fault

Main unit ROM fault

CPU fault

31

AUF Quick Menu

32

Table 26: Faults Which Cannot Be Automatically Reset

OCA

OCL

EPHO

OH2

Ot

E

UC

UPI

EF2

EPH1

EtYP

Err2

Err5

Err7

Err8

EEP1

EEP2

EEP3

Etn1

E-18

E-19

E-20

E-21

Motor overcurrent at start up

Overcurrent on load side at start up

Output phase loss


Overtorque fault

External fault stop


Undervoltage fault (main circuit)

Ground fault

Input phase loss

Drive controller error

Main unit RAM fault

Remote control error

Current detector fault

Control circuit board format error

EEPROM fault 1

EEPROM fault 2

EEPROM fault 3

Auto-tuning error

VIA input detection error

Main unit CPU communication error

Excessive voltage boost

CPU fault 2

CAUTION


• Repeated reset of the thermal overload can result in thermal stress to the motor.

• When faults occur, promptly inspect the motor and driven equipment for problems such as locked shaft and mechanical overload before restarting. Also check the power supplied to the motor for abnormal conditions such as phase loss and phase imbalance.

Failure to follow these instructions can result in equipment damage.

When using Auto Restart, observe the following:

• By default, protective operation detection relay signals (FLA-FLB-FLC terminal signals) are not sent during an auto restart process. To allow a signal to be sent to the protective operation detection relay (FLA-FLB-FLC terminals) during an auto restart process, assign value 36 or 37 to parameter F132.

• A calculated cooling time is provided for overload tripping (OL1, OL2, OLr). In this case, the auto restart function operates after the calculated cooling time and the restart time.

• In the event of an overvoltage fault (OP1–OP3), the auto restart function is not activated until the voltage in the DC section comes down to a normal level.

• In the event of an overheating fault (OH), the auto restart function is not activated until the drive controller temperature is low enough to restart operation.

McQuay OM 844-1

McQuay OM 844-1

AUF Quick Menu

• When F602 is set to 1 (fault retained), the restart function is not performed, regardless of the setting of F303.

• During an auto restart process, the display alternates between “rtry” and the setting specified by display mode selection parameter F710.

• The number of auto restarts is cleared if the drive controller does not fault for the specified period of time after a successful restart. A successful restart means that the drive controller output frequency reaches the command frequency without causing the drive controller to fault again.

Drive Controller Fault Retention

2)#%

Drive controller fault retention

This parameter can be set to retain fault information for display after power has been cycled.


Parameter Name

F602

Range

Drive Controller Fault

Retention Selection

0: Clear the fault information when power is removed

1: Retain the fault information when the power is removed

The causes of up to four trips can be displayed in status monitor mode.

Output Phase Loss Detection

2)#(

Output phase loss detection mode

The setting of this parameter determines how the drive controller responds after detecting an output phase loss. If the phase loss status persists for one second or more, the drive controller will fault, the FL relay will be activated, and fault code

EPHO will be displayed.


Parameter Name

F605

Output Phase Loss

Detection (one second or greater).

Range

0: Disabled

1: At start-up (only one time after power is turned on)

2: At start-up (each time)

3: During operation

4: At start-up and during operation

5: Detection of cutoff on output side

NOTE: If the drive controller detects an all-phase loss (i.e. contactor opening), it will restart on completion of recondition. The drive controller does not check for output phase loss when restarting after a momentary power loss.

33

AUF Quick Menu

34

Input Phase Loss Detection

2)#+

Input phase loss detection mode selection

Setting this parameter to 1 (default) enables Input Phase Loss Detection. During a complete input phase loss event the drive controller will fault (code EPHI) and the

FL relay will be activated.

NOTE: The drive controller may not fault on all input phase imbalance conditions.

Input phase loss nuisance tripping on low source impedance power systems may indicate the need to install an AC input line reactor.


Parameter Name

F608

Input Phase Loss Detection

Range

0: Disabled

1: Enabled

Setting F608 to 0 (input phase loss detection disabled) may result in damage to the drive controller if operation is continued under a heavy load during an input phase loss.

Avoiding Overvoltage Tripping

2&#(

Overvoltage limit operation

2)%)

Overvoltage stall protection level

Use these parameters to keep the output frequency constant, or to increase it to prevent overvoltage tripping should the voltage in the DC section rise during deceleration or varying speed operation. The deceleration time during overvoltage limit operation may increase above the designated time. Overvoltage stall protection level sets the percentage of the nominal DC bus level where the drive will modify the output frequency to prevent an Overvoltage fault.

Figure 18: Overvoltage Limit Operation Level

Output

Frequency

DC Voltage

F626 : Over-voltage stall protection level

CAUTION


• Repetitive braking can cause motor overheating and damage if the Quick Deceleration or Dynamic Quick Deceleration features are active.

• Use of a thermal sensor in the motor is recommended to protect the motor during repetitive braking.

Failure to follow these instructions can result in injury or equipment damage.

McQuay OM 844-1

McQuay OM 844-1

AUF Quick Menu

Table 30: Parameters F305, F626

Parameter Name

F305

Overvoltage Limit

Operation

Range

0: Enabled

1: Disabled

2: Enabled (quick deceleration - do not use)

3: Enabled (dynamic quick deceleration - do not use)

F626

Overvoltage Stall

Protection Level

100–150%*

* McQuay setting = 140%. If power transients are more common than normal, increase toward

150%.

If F305 is set to 2 (quick deceleration), the drive controller will increase the voltage to the motor (over-excitation control) to increase the amount of energy consumed by the motor when the voltage reaches the overvoltage protection level. The motor can therefore be decelerated more quickly than with normal deceleration.

If F305 is set to 3 (dynamic quick deceleration), the drive controller will increase the voltage to the motor (over-excitation control) to increase the amount of energy consumed by the motor as soon as the motor begins to slow down. The motor can therefore be decelerated even more quickly than with quick deceleration.

Undervoltage Fault

2)%*

Undervoltage fault/alarm selection

The setting of this parameter determines how the drive controller responds when it detects an undervoltage. The fault code displayed is UPI.


Parameter Name

F627

Undervoltage

Fault/Alarm

Selection

Range

0: Alarm only (input voltage level below 60%)

The drive controller stops but does not fault

(the FL relay is not activated).

1: Fault (detection level below 60%)

The drive controller stops and faults when the input voltage is less than 60% of it's rating.

2: Alarm only (input voltage level below 50%, input reactor needed)

The drive controller stops but does not fault when the input voltage is less than 50% of it's rating. A line reactor must be used with this setting.

35

AUF Quick Menu

Changing the Display Parameter

2*$#

Display selection

When power is applied to the drive controller, it is in display mode. The display terminal shows operation frequency as the default setting.


Parameter Name

F710

Display

Selection

Range

0: Operation frequency (Hz/free unit/step)

1: Frequency command (Hz/free unit/step)

2: Output current (%/A)

3: Drive controller rated current (A)

4: Drive controller load factor (%)

5: Output power

6: Frequency command after PID control (Hz/free unit/step)

7: Optional item specified from an external control unit

8: Output speed of fan motor

9: Communication counter

10: Normal state communication counter

36 McQuay OM 844-1

McQuay OM 844-1

Troubleshooting Fault and Alarm Codes


When an alarm or fault occurs, use Tables 33 and 34 to diagnose and resolve the

problem.

If the problem cannot be resolved by any of the actions described in the tables, refer to the programming guide or contact your McQuay representative.

Drive Controller Fault Conditions

Table 33: Fault Codes

Error

Code

OC1

OC1p

OC2

OC2P

OC3

OC3P

0C1p

0C2p

0C3p

Failure

Code

Problem

0001

0025

0002

0026

0003

0027

0025

0026

0027

Possible Causes Remedies

Overcurrent during acceleration

Transistor overcurrent

Overcurrent during deceleration


Overcurrent during constant speed operation


•

•

Ground fault

Motor overcurrent at start-up

(for 15 and 20 hp models only)

•

•

•

•

•

•

•

•

•

The acceleration time

ACC is too short.

The V/Hz setting is improper.

A restart signal is input to the rotating motor after a momentary stop, etc.

A special motor (e.g. motor with a small impedance) is used.

Possible ground fault.

•

•

•

•

The deceleration time dEC is too short.

Possible ground fault.

The load fluctuates abruptly.

Mechanical blockage

•

•

•

•

•

•

•

•

A current leaked from an output cable or the motor to ground.

A main circuit elements is defective.

•

•

Increase the acceleration time, ACC.

Check the V/Hz parameter.

Use F301 (autorestart) and F302(ridethrough control).

Adjust the switching frequency F300.

Set the switching frequency control mode selection parameter

F316 to 1 or 3

(switching frequency decreased automatically).

Increase the deceleration time dEC.


F316 to 1 or 3


Reduce the load fluctuation.

Check the load (operated machine).


F316 to 1 or 3


Contact your Mcquay representative.

Check the cables connecting the drive controller to the motor, and check the motor insulation.

Reduce the switching frequency.

Connect output filters in series with the motor.

37



(continued)

Error

Code

OCL

OCA

EpH1*

EPH0*

Op1

Op2

Failure

Code

Problem

0004

0005

0008

0009

000A

000B


Overcurrent (an overcurrent on the load side at start-up)

•

•

Motor overcurrent at start-up

•

The insulation of the output main circuit or motor is defective.

Motor impedance is too low

Current is leaked from an output cable or the motor to ground.

•

•

•

•

•

A main circuit elements is defective.

Possible ground fault

•

•

Check the cables and wires for defective insulation.

Check cables, connectors, and so on for ground faults.

•

Check the cables connecting the drive controller to the motor, and check the motor insulation.

Reduce the switching frequency.

Connect output filters in series with the motor.

Contact your McQuay representative.

Input phase loss

Output phase loss

Overvoltage during acceleration

•

•

•

•

•

•

•

•

•

•

•

•

•

Input phase loss, blown fuse

Three-phase drive controller used on a single phase line supply

Input phase imbalance

Transient phase fault

Loss of phase at drive controller output

Downstream contactor open

Motor not connected

Instability in the motor current

Drive controller oversized for motor

•

•

•

•

•

Line voltage too high

Line supply transients


There is possibility of output phase loss.

•

•

•

•

Check the main circuit input line for phase loss.

Enable F608 (input phase loss detection).

Check the main circuit output line, motor, etc. for phase loss.

Enable F605 (output phase loss detection).

Check the line voltage.

Compare with the drive controller nameplate rating.

Reset the drive controller.

Install a line reactor

Use F301 (autorestart) and F302 (ridethrough control).


Overvoltage during deceleration

•

•

•

•

•

The deceleration time dEC is too short.

(regenerative energy is too large.)

F305 (overvoltage limit operation) is off.

The input voltage fluctuates abnormally:

Overhauling load


•

•

•

Increase the deceleration time dEC.

Enable F305

(overvoltage limit operation).


38 McQuay OM 844-1

McQuay OM 844-1



(continued)

Error

Code

Op3

OL1

OL2

Ot*

OH

OH2

E

Failure

Code

Problem

000C

000D

000E

0020

0010

002E

0011


Overvoltage during constantspeed operation

Drive controller overload

•

•

Motor overload

Over-torque fault

Drive controller over temperature

•

•

•


•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

The input voltage fluctuates abnormally.

The motor is in a regenerative state because the load causes the motor to run at a frequency higher than the drive controller output frequency.


•

•

The acceleration time

ACC is too short.

The DC braking level is too large.



The load is too large.

•

•

•

•


The motor is locked.

Low-speed operation is performed continuously.

An excessive load is applied to the motor during operation.

•

•

•

Over-torque during operation.

The cooling fan does not rotate.

The ambient temperature is too high.

The vent is blocked.

A heat generating device is installed close to the drive controller.

The thermistor in the unit is broken.

•

•

•

•

External thermal fault.

External PTC probe fault.

•

•


•

•

•

Increase the acceleration time ACC.

Reduce the DC braking amount F251 and the

DC braking time F252.

Check the V/Hz parameter setting.

Use F301 (autorestart) and F302 (ridethrough control).

Use an drive controller with a larger rating.

Check the V/Hz parameter setting.

Check the load (operated machine).

Adjust OLN to the overload that the motor can withstand during operation in a low speed range.

Enable F615 (overtorque fault selection).

Check system error.

Restart the operation by resetting the drive controller after it has cooled down.

The fan requires replacement if it does not rotate during operation.

Ensure sufficient space around the drive controller.

Do not place any heat generating device near the drive controller.


Check the external thermal input.

Check the PTC in the motor.

Emergency stop

•

During automatic operation or remote operation, a stop command is entered from the operation panel or a remote input device.

•

Reset the drive controller.

39



(continued)

Error

Code

EEp1

EEp2

EEp3

Err2

Err3

Err4

Err5*

Err7

Err8

UC*

Up1*

EF2

Etn*

EtYp

Failure

Code

Problem

0012

0013

0014

0015

0016

0017

0018

001A

001B

001D

001E

0022

0054

0029


EEPROM fault 1

EEPROM fault 2

EEPROM fault 3

Main unit RAM fault

Main unit ROM fault

CPU fault 1

Communication error

Current detector fault

•

Network error


Undervoltage fault

(main circuit)

Ground fault

Auto-tuning error

Drive controller type error

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

Data writing error.

Power supply is cut off during tYp operation and data writing is aborted.

A data reading error occurred.

The control RAM is defective.

•

•

•

•

Turn off the drive controller, then turn it again. If it does not recover from the error, contact your McQuay representative.

Turn the power off temporarily and turn it back on, and then try tYp operation again.

Turn off the drive controller, then turn it again. If it does not recover from the error, contact your McQuay representative.


The control ROM is defective.

The control CPU is defective.

An error arises during serial communication.

The current detector is defective.

•

•

•

•



Check the remote control device, cables, etc.


The error has occurred during Network communication.

•

Check the Network device and wiring.

The output current decreased to a lowcurrent detection level during operation.

The input voltage (in the main circuit) is too low.

•

•

•

•

•

Enable F610 (lowcurrent detection).

Check the suitable detection level for the system (F611,

F612).

Check the input voltage.

Enable F627

(undervoltage fault selection).

To cope with a momentary stop due to undervoltage, enable

F302 (ride-through control) and F301

(auto-restart).

A ground fault occurs in the output cable or the motor.

•

Check the cable and the motor for ground faults.

Check the motor parameter F401 to F494.

The motor with the capacity of 2 classes or less than the drive controller is used.

The output cable is improperly sized.

The motor is rotating.

The drive controller is used for loads other than those of three-phase induction motors.

Circuit board is changed.

(or main circuit/drive circuit board)

•


40 McQuay OM 844-1

McQuay OM 844-1



(continued)

Error

Code

Failure

Code

Problem Possible Causes

E-18*

E-19

E-20

E-21

SOUt

0032

0033

0034

0035

002F

Break in analog signal cable

CPU communication error

Excessive voltage boost

CPU fault 2

Step-out (for PM motor only)

•

•

•

•

•

•

•

•

The signal input via VIA is below the analog signal detection level set with F633.

•

A communications error occurs between control

CPUs.

•

The voltage boost parameter F402 is set too high.

Impedance of the motor is too low

The control CPU is defective.

The motor shaft is locked.

One output phase is open.

An impact load is applied.

•

•

•

•

* You can select a trip ON/OFF by parameters.

Remedies

Check the cables for breaks. And check the setting of input signal or setting value of F633.


Decrease the setting of the voltage boost parameter F402.


Unlock the motor shaft.

Check the interconnect cables between the drive controller and the motor.

41


Drive Controller Alarm Conditions

Alarms do not cause the drive controller to fault.

Table 34: Alarm Codes

Error

Code

Problem Possible Causes Remedies

OFF

NOFF rtrY

Err1

CLr

EOFF

H1

LO

HEAd

End db

EI

StOp

LStp

ST terminal

OFF

•

The ST-CC circuit is opened.

•

Close the ST-CC circuit.

Undervoltage in main circuit

Restart in process

Frequency point setting error alarm

Clear command acceptable

Emergency stop command acceptable

Setting error alarm /

An error code and data are displayed alternately twice each.

Display of first/last data items

•

•

•

•

•

•

•

•

The supply voltage between R,

S and T is under voltage.

The drive controller is in the process of restart.

A momentary stop occurred.

The frequency setting signals at points 1 and 2 are set too close to each other.

This message is displayed when pressing the STOP key while an error code is displayed.

•

•

•

The operation panel is used to stop the operation in automatic control or remote control mode.

•

•

Measure the main circuit supply voltage.

If the voltage is at a normal level, the drive controller requires repairing.

The drive controller is operating normally if it restarts after several tens of seconds.

Set the frequency setting signals at points 1 and 2 apart from each other.

Press the STOP key again to clear the fault.

Press the STOP key for an emergency stop.

To cancel the emergency stop, press any other key.

An error is found in a setting when data is reading or writing.

•

Check whether the setting is made correctly.

The first and last data item in the auh data group is displayed.

•

Press MODE key to exit the data group.

DC braking

•

DC braking in process

•

The message goes off in several tens of seconds if no problem occurs.

Flowing out of excess number of digits

Momentary power failure slowdown stop prohibition function activated.

Auto-stop because of continuous operation at the lowerlimit frequency

•

•

•

The number of digits such as frequencies is more than 4.

(The upper digits have a priority.)

The automatic stop function selected with F256 was activated.

•

Lower the frequency free unit magnification F702.

The slowdown stop prohibition function set with F302

(momentary power failure ridethrough operation) is activated.

•

To restart operation, reset the drive controller or input an operation signal again.

•

To deactivate the automatic stop function, increase the frequency command above the lower-limit frequency (LL) + 0.2 Hz or turn off the operation command.

42 McQuay OM 844-1

McQuay OM 844-1


Table 34: Alarm Codes

(continued)

Error

Code

Problem Possible Causes

InIt

Parameters in the process of initialization

•

Parameters are being initialized to default values.

E-17

Operation panel key fault

Atn1 Auto-tuning

•

•

•

The RUN or STOP key is held down for more than 20 seconds.

The RUN or STOP key is faulty.

•

Auto-tuning in process

•

•

Remedies

Normal if the message disappears after a while (several seconds to several tens of seconds).

Check the operation panel.

h999

H999

Integral input power

Integral output power

•

•

Integral input power is more than 999.99 kWh.

Integral output power is more than 999.99 kWh.

•

•

Normal if it the message disappears after a few seconds.

Press and hold down the key for

3 seconds or more when power is off or when the input terminal function CKWH is turned on or displayed.

Press and hold down the key for

3 seconds or more when power is off or when the input terminal function CKWH is turned on or displayed.

43


Pre-Alarm Displays

Table 35: Pre-alarm codes

C

P

L

H

Overcurrent alarm

Overvoltage alarm

Same as OC (overcurrent)

Same as OP (overvoltage)

Overload alarm

Same as OL1 and OL2

(overload)

Overheating alarm

Same as OH (overheating)

The pre-alarms are displayed, blinking, in the following order from left to right: C, P,

L, 4.

If two or more problems arise simultaneously, one of the following alarms appears and blinks: CP, PL, CPL.

Resetting the Drive Controller After a

Fault Condition

Do not reset the drive controller when faulted because of a failure or error before eliminating the cause of the fault. Resetting the tripped drive controller before eliminating the problem causes it to fault again.

The drive controller can be reset after a fault with any of the following operations:

1. Turning off the power.

2. Using external signal.

3. Using the Stop key on the display terminal: a. Press the STOP key and make sure that CLr is displayed.

b. Eliminate the cause of the fault.

c. Press the STOP key again to reset the drive controller.

4. Inputting a fault clear signal from a remote communication device.

When any overload function (OL1 or OL2) is active, the drive controller cannot be reset by inputting a reset signal from an external device or with the Stop key on the display terminal if the calculated cooling time has not expired. Calculated cooling time:

• OL1: 30 seconds after the fault has occurred

• OL2: 120 seconds after the fault has occurred

CAUTION


• Repeated reset of the thermal state after a thermal overload can result in thermal stress to the motor.

• When faults occur, promptly inspect motor and driven equipment for problems (locked shaft, mechanical overload, etc.) before restarting. Also check power supplied to the motor for abnormal conditions (phase loss, phase imbalance, etc.).

Failure to follow these instructions can result in equipment damage.

44 McQuay OM 844-1

McQuay OM 844-1

Appendix A—Input Terminal Functions


The input terminals F, R, and RES can be configured with the settings in Table 36.

Table 36: Input Terminal Functions

Function

No.

#

Code

-

Function Action

$

*

%

&

(

)

*

+

$#

*

$$

*

$&

$'

$(

$)

*

%#

%$

%%

%&

%'

%(

%)

ST

F

R

AD2

SS1

SS2

SS3

RES

EXT

DB

PID

PWENE

ST+RES

F+AD2

R+AD2

F+SS1

R+SS1

F+SS2

R+SS2

F+SS3

No function is assigned Disabled

ON: Ready for operation

Standby terminal

Forward run command

Reverse run command

Acceleration/deceleration 2 pattern selection

OFF: Coast stop (gate off)

ON: Forward run OFF: Slowdown stop

ON: Reverse run OFF: Slowdown stop

ON: Acceleration/deceleration 2

OFF: Acceleration/deceleration 1 or 3

Preset-speed command 1



Selection of 7-speed with SS1 to SS3

(3 bits)

Reset command

ON: Acceptance of reset command

ON

→ OFF: Fault reset

Fault stop command from external input device

DC braking command

ON: E Fault stop

ON: DC braking

ON: PID control prohibited

PID control prohibited

OFF: PID control permitted

ON: Parameter editing permitted

Permission of parameter editing

Combination of standby and reset commands

Combination of forward run and acceleration/deceleration 2

Combination of reverse run and acceleration/deceleration 2

Combination of forward run and preset-speed command 1

OFF: Parameter editing prohibited

(If F700=1)

ON: Simultaneous input from ST and

RES

ON: Simultaneous input from F and

AD2

ON: Simultaneous input from R and

AD2


SS1

Combination of reverse run and preset-speed command 1





SS1


SS2


SS2


SS3

45



(continued)

Function

No.

%*

&#

&$

&%

&&

&'

&(

&+

&,

'#

'$

'%

'&

''

*

*

*

*

*

Code Function Action

R+SS3

F+SS1+AD2

R+SS1+AD2

F+SS2+AD2

R+SS2+AD2

F+SS3+AD2

R+SS3+AD2

FCHG

VF2

MOT2

UP

DOWN

CLR

CLR+RES



SS3

Combination of forward run, preset-speed command 1 and acceleration/deceleration 2

Combination of reverse run, preset-speed command 1 and acceleration/deceleration 2





Frequency command forced switching

ON: Simultaneous input from F, SS1 and AD2

ON: Simultaneous input from R, SS1 and AD2





No.2 Switching of V/Hz setting

No.2 motor switching

(VF2 + AD2 + OCS2)

ON: F207 (if F200 = 0)

OFF: FNOd

ON: No.2 V/Hz setting

(pt=0, F170, F171, F172,

F173)

OFF: No.1 V/Hz setting

(Set value of pt, uL, ulu, ub, tHr)

ON: No.2 motor

(pt=0, F170, F171,

F172, F173, F185, F500,

F501, F503)

OFF: No.1 motor (set value of pt, uL, uLu, ub, tHr, ACC, dEC, F502, F601)

Frequency UP signal input from external contacts

Frequency DOWN signal input from external contacts

Frequency UP/DOWN cancellation signal input from external contacts

Combination of frequency

UP/DOWN cancellation and reset by means of external contacts

ON: Increase in frequency

ON: Reduction in frequency

OFF

→ ON: Resetting of UP/DOWN frequency by means of external contacts

ON: Simultaneous input from CLR and RES

46 McQuay OM 844-1

McQuay OM 844-1



(continued)

Function

No.

Code Function

'(

*

')

*

'*

*

'+

',

($

*

(%

*

(&

*

('

*

((

*

()

(*

)$

)%

*

)'

*

)(

EXTN

OH

OHN

SC/LC

HD

CKWH

FORCE

FIRE

STN

RESN

F+ST

R+ST

OCS2

HDRY

PRUN

ICLR

Action

Inversion of fault stop command from external device

Thermal fault stop signal input from external device

Inversion of thermal fault stop command from external device

OFF: E Fault stop

ON: OH2 Fault stop

OFF: OH2 Fault stop

Forced switching from remote to local control

Operation holding (stop of

3-wire operation)

Enabled when remote control is exercised

ON: Local control (setting of CNOd,

FNOd and F207)

OFF: Remote control

ON: F (forward run)/R: (reverse run) held, 3-wire operation

OFF: Slowdown stop

Display cancellation of the cumulative power amount

(kWh)

ON: Monitor display cancellation of the cumulative power amount (kWh)

Forced operation (factory configuration required)

ON: Forced operation mode in which operation is not stopped in the event of the occurrence of a soft fault

(preset speed operation frequency

15) To use this function, the inverter needs to be so configured at the factory.

OFF: Normal operation

Fire-speed control

ON: Fire-speed operation (F244)

Forced fire speed setting frequency

OFF: Normal operation

Freewheel stop (gate off) ON: Freewheel stop (gate off)

ON: Acceptance of reset command

Inversion of RES

Combination of forward run and standby

Combination of reverse run and standby

Forced switching of stall prevention level 2

Holding of RY-RC terminal output

OFF

→ ON: Fault reset


ST


ST

ON: Enabled at the value of F185

OFF: Enabled at the value of F601

ON: Once turned on, RY-RC are held on.

Cancellation (clearing) of operation command from panel

OFF: The status of RY-RC changes in real time according to conditions.

0: Operation command canceled

(cleared)

PID control integral value clear

1: Operation command retained

ON: PID control integral value always zero

OFF: PID control permitted

47



(continued)

Function

No.


))

)*

)+

),

*#

*$

ST+F+SS1

ST+R+SS1

ST+F+SS2

ST+R+SS2

ST+F+SS3

ST+R+SS3

Combination of standby, forward run and presetspeed command 1

Combination of standby, reverse run and presetspeed command 1





ON: Simultaneous input from ST, F and SS1

ON: Simultaneous input from ST, R and SS1





* When function

$

,

$#

,

$$

,

$)

,

&+

,

'$

,

'%

,

'&

,

''

,

'(

,

')

,

'*

,

($

,

(%

,

(&

,

('

,

((

,

)%

, or

)'

is assigned to an input terminal board, the input terminal board is enabled even if the parameter command mode selection CNOd is set at 1 (panel).

48 McQuay OM 844-1

McQuay OM 844-1

Appendix B—Output Terminal Functions


The output terminals FLA, FLB, FLC, RY, and RC can be configured with the settings

in Table 37.

Table 37: Output Terminal Functions

Function

No.


#

$

%

&

'

(

)

*

+

,

$#

$$

LL

LLN

UL

ULN

LOW

LOWN

RCH

RCHN

RCHF

RCHFN

FL

FLN

Low speed

Inversion of low speed

ON: Output frequency is equal to or higher than UL value.

High speed

OFF: Output frequency is lower than UL value.

Inversion of high speed Inversion of UL setting

Low-speed detection signal

ON: The output frequency is above the LL set value.

OFF: The output frequency is equal to or less than the LL set value.

Inversion of LL setting

ON: Output frequency is equal to or higher than F100 value.

OFF: Output frequency is lower than F100 value.

Inversion of low-speed detection signal

Inversion of LOW setting

Designated frequency attainment signal

(completion of acceleration/deceleration)

ON: The output frequency is equal to or less than the specified frequency ± frequency set with

F102.

OFF: The output frequency is above the specified frequency ± frequency set with F102.

Inversion of designated frequency attainment signal (inversion of completion of acceleration/deceleration)

Inversion of RCH setting

Set frequency attainment signal

ON: The output frequency is equal to or less than the frequency set with F101 ± F102.

OFF: The output frequency is above the frequency set with

F101 ± F102.

Inversion of set frequency attainment signal

Inversion of RCHF setting

Failure signal (fault output)

ON: When inverter is tripped

OFF: When inverter is not tripped

Inversion of failure signal

(inversion of fault output)

Inversion of FL setting

49



(continued)

Function

No.

Code Function

$%

$&

$'

$(

$)

$*

%#

%$

%%

%&

%'

%(

%)

%*

OT

OTN

RUN

RUNN

POL

POLN

POT

POTN

PAL

PALN

UC

UCN

HFL

HFLN

Action

ON: Torque current is equal to or larger than set value and longer than F618 set time.

Over-torque detection

OFF: The torque current is equal to or less than (F616 set value -

F619 set value).

Inversion of over-torque detection

Inversion of OT

Start/Stop

ON: When operation frequency is output or during (db)

OFF: Operation stopped

Inversion of RUN/STOP Inversion of RUN setting

ON: 50% or more of calculated value of overload protection level

OL pre-alarm

OFF: Less than 50% of calculated value of overload protection level

Inversion of OL pre-alarm Inversion of POL setting

Over-torque detection pre-alarm

ON: Torque current is equal to or larger than 70% of F616 set value.

OFF: The torque current is below

(F616 set value x 70% - F619 set value).

Inversion of over-torque detection pre-alarm

Inversion of POT setting

One of the following is turned on:

ON POL, POHR, POT, MOFF, UC,

OT, LL, stop, COT, and momentary power failure slowdown stop.

Pre-alarm

Inversion of pre-alarm

Low-current detection

Or C, p, or H issues an alarm

All the following are turned off:

OFF POL, POHR, POT, MOFF,

UC, OT, LL, stop, COT, and momentary power failure slowdown stop.

Or C, p, or H issues no alarm

Inversion of PAL setting

ON: The output current is equal to or less than F611 (set value) for

F612 (set time).

Inversion of low-current detection

Inversion of UC setting

Significant failure

ON: OCA, OCL, Ot, E,

EEP1, Etn, EPHO, Err2–

5, OH2, UP1, EF2, UC,

EtYP, or EPH1)

OFF: Failure other than the above

Inversion of significant failure

Inversion of HFL setting

50 McQuay OM 844-1

McQuay OM 844-1



(continued)

Function

No.

Code Function

%+

%,

&#

&$

&%

&&

&'

&(

&)

&*

&+

&,

'%

'&

''

'(

LFL

LFLN

RDY1

RDY1N

RDY2

RDY2N

FCVIB

FCVIBN

FLR

FLRN

OUT0

OUT0N

COT

COTN

LTA

LTAN

Action

Insignificant failure

ON: (OC1–3, OP1–3, OH,

OL1–2, OLr)

OFF: Failure other than the above

Inversion of insignificant failure

Inversion of LFL setting

Ready for operation

(including ST/RUN)

ON: Ready for operation (ST and

RUN are also ON)

OFF: Others

Inversion of ready for operation (including

ST/RUN)

Inversion of RDY1 setting

Ready for operation

(excluding ST/RUN)

ON: Ready for operation (ST and

RUN are not ON)

OFF: Others

Inversion of ready for operation (excluding

ST/RUN)

Inversion of RDY2

ON: VIB selected as frequency command

Frequency VIB selection

OFF: Terminal other than VIB selected as frequency command

Inversion of frequency

VIB selection

Inversion of replacement alarm

Inversion of FCVIB

ON: When inverter trips or restarts

Fault signal (put out also at the time of a restart)

Parts replacement alarm

OFF: When inverter does not trip or restart

Inversion of failure signal

(put out also at the time of a restart)

Inversion of cumulative operation time alarm

Inversion of FLR

ON: Specified data from remote control FA50: BIT0= 1

Specified data output 1

Inversion of specified data output 1

Inversion of OUT0 setting

Cumulative operation time alarm

OFF: Specified data from remote control FA50: BIT0= 0

ON: Cumulative operation time is equal to or longer than F621

OFF: Cumulative operation time is shorter than F621

Inversion of COT

ON: Calculation for parts replacement time is equal to or longer than the preset time

ON: Calculation for parts replacement time is shorter than the preset time

Inversion of LTA

51



(continued)

Function

No.

Code Function

'+

',

(#

($

(%

(&

('

((

()

(*

(+

(,

)#

)$

)%!

%(&

%('

%((

LI1

LI1N

LI2

LI2N

PIDF

PIDFN

MOFF

MOFFN

LOC

LOCN

PTC

PTCN

PIDFB

PIDFBN

Disabled

AOFF

AON

Action

ON: The signal input to F terminal is

ON

F terminal input signal

OFF: The signal input to F terminal is OFF

Inversion of F terminal input signal

PTC thermal alarm

Inversion of LI1

ON: The signal input to R terminal is ON

R terminal input signal

Inversion of local/remote switching

OFF: The signal input to R terminal is OFF

Inversion of R terminal input signal

Inversion of signal in accordance of frequency command (VIA)

Inversion of LI2

ON: Frequency commanded by

FNOd or F207 and that by VIA show the same value.

Signal in accordance of frequency command (VIA)

OFF: Frequency commanded by

FNOd or F207 and that by VIA show different values.

Inversion of PIDF setting

ON: Undervoltage detected

Undervoltage detection

OFF: Other than undervoltage

Inversion of undervoltage detection

Inversion of MOFF

ON: Local mode

Local/remote switching

OFF: Remote mode

Inversion of LOC

ON: 60% and over the protection level by PTC

OFF: Normal condition

Inversion of PTC thermal alarm

ON: Frequency commanded by

FNOd or F207 and that by VIB show the same value.

Signal in accordance of frequency command (VIB)

OFF: Frequency commanded by

FNOd or F207 and that by VIB show different values.

Inversion of signal in accordance of frequency command (VIB)

Invalid settings, always

OFF (ignored)

Always OFF

Always ON

Inversion of PTC

Inversion of PIDFB setting

Invalid settings, always OFF

(ignored)

Always OFF

Always ON

52 McQuay OM 844-1

McQuay OM 844-1

Appendix C—Receiving and Preliminary Inspection

Appendix C—Receiving and Preliminary

Inspection

This appendix only applies to replacing VFD drives on existing equipment.

WARNING

DAMAGED PACKAGING

If the packaging appears damaged, it can be dangerous to open it or handle it.


WARNING

DAMAGED EQUIPMENT

Do not operate or install any drive controller that appears damaged.


Before installing the drive controller, read pages 7–54 and follow all precautions.

Before removing the drive controller from its packaging, verify that the carton is not damaged from shipping. Damage to the carton usually indicates improper handling. If any damage is found, notify the carrier and your McQuay representative.

Storing and Shipping

If the drive controller is not immediately installed, store it in a clean, dry area where the ambient temperature is between -25

°

F and +158

°

F (-32

°

C and +70

°

C). If the drive controller must be shipped to another location, use the original shipping material and carton to protect the drive controller.

53


Lifting and Handling

WARNING

HANDLING AND LIFTING HAZARD

Keep the area below any equipment being lifted clear of all personnel and property. Use the lifting method illustrated in the figure below.


45° max.

• MD2 drive controllers up to 25 hp can be removed from their packaging and installed without a handling device.

• A hoist must be used for handling and lifting drive controllers of higher ratings.

• After removing the drive controller from its packaging, inspect it for damage. If any damage is found, notify the carrier and your sales representative.

• Verify that the drive controller nameplate and label conform to the packing slip and corresponding purchase order.

WARNING

RISK OF TOPPLING

• Do not stand the drive upright.

• Keep the drive on pallet until ready to install.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

Precautions

DANGER


Before turning on the drive controller or upon exiting the configuration menus, ensure that the inputs assigned to the Run command are in a state that will not cause the drive controller to run. Otherwise, the motor can start immediately


CAUTION

INCOMPATIBLE LINE VOLTAGE

Before turning on and configuring the drive controller, ensure that the line voltage is compatible with the line voltage range specified on the drive controller nameplate. The drive controller can be damaged if the line voltage is not compatible.

Failure to follow this instruction can result in injury or equipment damage.

54 McQuay OM 844-1

McQuay OM 844-1


The symbols used in Table 38 are as follows:

• W: Width

• H: Height

• D: Depth

• W1: Mounting dimension (horizontal)

• H1: Mounting dimension (vertical)

• H2: Height of EMC plate mounting area

.

Table 38: Outside Dimensions and Weight

Voltage class

Applicable motor hp

3-phase

230 V

5

7.5

10

15

3

4

1

2

20

25

W

4

(105)

5.5

(140)

7

(180)

9.6

(245)

30

40

9.4

(240)

12.5

(320)

3-phase

460 V

50

60

75

100

20

25

30

40

5

7.5

10

15

3

4

1

2

4

(105)

5.5

(140)

7

(180)

9.6

(245)

9.4

(240)

9.4

(240)

12.5

(320)

Dimensions in. (mm)

H

5.6

(143)

7.2

(184)

9.1

(232)

D

5.9

(150)

5.9

(150)

6.7

(170)

11.4

(290)

W1

3.6

(93)

4.9

(126)

6.3

(160)

13

(329.5)

7.5

(190)

8.8

(225)

16.5

(420)

24.8

(630)

5.6

(143)

7.2

(184)

9.1

(232)

13

(329.5)

7.5

(190)

8.8

(225)

16.5

(420)

21.7

(550)

24.8

(630)

8.4

(214)

11.4

(290)

5.9

(150)

5.9

(150)

6.7

(170)

8.4

(214)

11.4

(290)

8.1

(206)

11

(280)

3.6

(93)

4.9

(126)

6.3

(160)

8.1

(206)

8.1

(206)

11.0

(280)

H1

4.7

(121.5)

6.1

(157)

8.2

(210)

11.6

(295)

15.8

(403)

23.8

(604.5)

4.7

(121.5)

6.1

(157)

8.2

(210)

11.6

(295)

15.8

(403)

20.8

(529)

23.8

(604.5)

H2

2

(50)

1.8

(48)

2.95

(75)

2.95

(75)

4.8

(122)

4.7

(118)

2

(50)

1.8

(48)

2.95

(75)

2.95

(75)

4.8

(122)

5.29

(113)

4.7

(118)

Refer to drawing:

Approx. weight lb

(kg)

A

B

C

D

E

F

A

B

C

D

E

G

G

4.0

(1.8)

6.7

(3.1)

13.5

(6.1)

25.4

(11.5)

60.6

(27.4)

85.3

(38.7)

4.4

(2.0)

7.4

(3.4)

14.3

(6.5)

25.75

(11.7)

51.81

(23.5)

58.3

(26.4)

87.5

(39.7)

55


NOTE: In the following figures, dimensions common to all drive controllers are shown with numeric values, not with symbols. The model shown in Drawing A is fixed at two points: in the upper left and lower right corners.

Drawing A

Ø0.2 (5)

3.7 (93)

(Installation dimension)

R 0.1 (2.5)

0.51

(13)

M5

4-M4

3.7 (95)

EMC plate

Drawing B

2-Ø1.0 (25)

56

5.0 (126)


5.5 (140)

0.6

(14)

2-R 0.1 (2.5)

M5 4-M4

3.7 (95)

EMC plate

McQuay OM 844-1

McQuay OM 844-1

Drawing C


0.5

(1

3)

.5

)

1

(2

R

0.

R 0.1 (2.5)

Drawing D

Ø

0.6

.1

(3

)

(1

4) R 0.1 (3)

57


Drawing E

Ø

0.6 (15)

(1

(3

)

0.

1

5) R 0.1 (3)

8 (206)


Drawing F

Ø

0.6

(1

0.

1

(3

5) R 0.1 (3)

)

58 McQuay OM 844-1

Drawing G


McQuay OM 844-1 59

Appendix D—Wiring Recommendations


No field wiring is required except in the following instances:

Controls by others - McQuay provides examples of typical control wiring (see

Appendix E—Wiring Diagrams and Parameter Settings), but control wiring ultimately

is the customer’s responsibility. All power wiring is factory installed and must not be changed.

Replacing a drive in an existing unit - Any replacement VFD must be wired exactly as the original VFD. This applies to power and control wiring. Carefully examine the original wiring and the wiring schematic before removing the original VFD.

Field Control Wiring and General Background for

Reconnecting Wiring to a Replacement VFD

Good wiring practice requires the separation of control wiring from all power (line) wiring. In addition, power wiring to the motor must have the maximum possible separation from all other power wiring, whether from the same drive controller or other drive controllers. Do not run power and control wiring, or multiple power wiring,

in the same conduit. This separation reduces the possibility of coupling electrical transients from power circuits into control circuits or from motor power wiring into other power circuits.

WARNING

IMPROPER WIRING PRACTICES

• Follow the wiring practices described in this document in addition to those already required by the National Electrical Code and local electrical codes.

• The drive controller will be damaged if input line voltage is applied to the output terminals (U/T1, V/T2, W/T3).

• Check the power connections before energizing the drive controller.

• If replacing another drive controller, verify that all wiring connections to the MD2 drive controller comply with all wiring instructions in this manual.


Follow the practices below when wiring MD2 drive controllers:

• Verify that the voltage and frequency of the input supply line and the voltage, frequency, and current of the motor match the rating on the drive controller nameplate.

• Use metallic conduit for all drive controller wiring. Do not run control and power wiring in the same conduit.

• Separate the metallic conduits carrying power wiring or low-level control wiring by at least 76 mm (3 in.).

• Separate the non-metallic conduits or cable trays carrying power wiring from the metallic conduit carrying control wiring by at least 305 mm (12 in.).

60 McQuay OM 844-1

McQuay OM 844-1


• Whenever power and control wiring cross, the metallic conduits and non-metallic conduits or trays must cross at right angles.

• Equip all inductive circuits near the drive (such as relays, contactors, and solenoid valves) with noise suppressors, or connect them to a separate circuit.

Branch Circuit Protection and General Background for

Reconnecting a Replacement VFD

McQuay factory installed all necessary branch circuit protection and grounding wires for the original VFD and fan motor. No further wiring is required except for field control

wiring on “controls by others” (see page 60) applications.

Factory branch circuit protection, ground wiring, or any factory wiring, must not be changed.

The motor size must not be changed and any replacement motor nameplate amps must not exceed the original motor nameplate amps.

Refer to NEC Article 430 for sizing of branch circuit conductors. Ensure that all branch circuit components and equipment (such as transformers, feeder cables, disconnect devices, and protective devices) are rated for the input current of the MD2 drive controller, or for the rated output current, whichever value is larger. Rated input and output current values are shown on the drive controller nameplate.

NOTE: Ensure that the branch circuit feeder protection rating is not less than the rated output current of the drive controller.

WARNING

INADEQUATE OVERCURRENT PROTECTION

• Overcurrent protective devices must be properly coordinated.

• The National Electrical Code and the Canadian Electricity Code require branch circuit protection. Use the fuses recommended on the drive controller nameplate to achieve published fault withstand current ratings.

• Do not connect the drive controller to a power feeder whose short circuit capacity exceeds the drive controller withstand fault rating listed on the drive controller nameplate.


Grounding

For safe, dependable operation, ground the drive controller according to the National

Electrical Code and all local codes.

• To comply with current regulations concerning high leakage currents (above

3.5 mA), use at least a 10 mm² (6 AWG) protective conductor, or two protective conductors with the same cross-section as the power section AC supply conductors.

• Verify that resistance to ground is one ohm or less. Improper grounding causes intermittent and unreliable operation.

61


DANGER


Ground the equipment using the provided ground connecting point as shown in Figure 19. The drive controller panel must be properly grounded before power is applied.


Make certain McQuay factory installed grounding is maintained (see “Proper

Grounding” in Figure 19). Do not loop the ground cables or connect them in series

(see “Improper Grounding” in Figure 19).

Figure 19: Grounding Multiple Drive Controllers

Proper

Grounding

Improper

Grounding

YES

NO

Drive Controller

Drive Controller

Drive Controller

Drive Controller Drive Controller Drive Controller

Drive Controller Drive Controller

Drive Controller

208 - 230 Volt, 7.5 - 10 HP VFDs

208 - 230 V, 7.5 -10 HP VFD nameplate amps may be rated 1 amp less than the motor nameplate amps. Amp disparity between VFD and motor nameplates is normal for this application.

62 McQuay OM 844-1


Power Terminals

To access the power terminals, open the cover using one of the methods illustrated in

Figure 20.

Figure 20: Power Terminal Access

Example MD2, 2 hp

Example MD2, 30 hp

McQuay OM 844-1

Table 39: Power Terminal Functions


Ground terminal

R/L1

S/L2

T/L3

U/T1

V/T2

W/T3

PO

PA/+

PB

PC/-

Power supply

Outputs to the motor

DC bus (+) polarity (do not use)

DC bus (+) polarity

DC bus connection (do not use)

DC bus (–) polarity

NOTE: The PA/+, and PC/- terminals can only be used to measure the DC bus voltage. Do not remove the jumper between PA/+ and PO.

63


Table 40: Power Terminal Characteristics

Voltage

MD2H

230 V

460 V

hp

20

25

30

40

1–7.5

10

15

20

1–3

4

5

7.5

10

15

25

30

40

50

60

75–100

AWG

10

10

10

6

6

3

3

3

1/0

300 kcmil

10

6

6

3

3

1/0

1/0

1/0

1/0

300 kcmil

Maximum Wire Size Tightening Torque mm²

6

16

16

25

25

25

50

150

6

6

6

16

16

25

25

50

50

50

50

150

Nm (lb-in)

1.3 (10.7)

1.3 (10.7)

1.3 (10.7)

2.5 (22.3)

2.5 (22.3)

4.5 (40.1)

4.5 (40.1)

2.5 (22.3)

12 (106.2)

41 (362.9)

1.3 (10.7)

2.5 (22.3)

2.5 (22.3)

4.5 (40.1)

4.5 (40.1)

12 (106.2)

12 (106.2)

12 (106.2)

12 (106.2)

41 (360)

64 McQuay OM 844-1

McQuay OM 844-1

Appendix E—Wiring Diagrams and Parameter Settings

Appendix E—Wiring Diagrams and

Parameter Settings

Table 42, Table 43, and Table 44 indicate McQuay factory settings that deviate from

VFD defaults or are parameters that normally require field adjustment. Adjusting other parameters is not recommended.

WARNING


• Any parameter values altered from the VFD control panel will affect the operation of the drive.

• If parameter “ tYp

” is selected and changed, altered parameters will be transferred into the VFD memory and may affect safe operation of the equipment.


LL (Lower Limit Frequency)

If the VFD is placed into LOCAL control mode, local or remote keypad can alter the

Lower Limit Frequency to a value above the 20.0 Hz setting as determined by parameter LL (McQuay Factory Value = 20.0 Hz). The altered value can be placed into Memory.

MODE KEY (LOCAL or REMOTE Keypad)

If the MODE key is pressed once or twice, the keypad panel display will not positively indicate the frequency output that the motor is running at, or not running. The redcolored RUN LED light indicates that the drive is in a mode enabled to run. Pressing the mode key a third time will restore the digital display to the frequency output monitoring condition. Only then will the motor run speed be indicated.

Always assume that the drive is operating, even when a motor run speed is not displayed.

WARNING


• The fan and VFD may be operating even though motor run speed is not displayed.


65


MPS Rooftop with MicroTech II Controls for SAF and EAF Applications

Figure 21: VFD Control Wiring and Switch Settings

SW4

SOURCE

PLC

SINK

SW4

F

PLC P24 CC

R RES FM

FLA FLB FLC RY RC

FM VIA

V

I

V

I

SW2 SW3

PP VIA VIB CC

VFD Enable Relay

(MPS control panel)

Common from

Unit Controller

Analog Signal

(from Unit Controller)

NOTE: Contacts and wire terminations are in the unit control panel.

Switch Settings:

SW 4: Source (up)

FM: Voltage (up)

VIA: Voltage (up)

Parameter Settings:

The MD2 VFD has been made to McQuay specifications. All factory installed MD2

VFDs with MicroTech II controls are also factory configured and started. Table 42 lists

the parameters that have been specifically configured for McQuay or else may need owner adjustment as described in this manual.

• “VFD Default” settings are the vendor defaults (see page 70 for more information)

• “McQuay Settings” are the recommended settings for McQuay units.

• No other parameters should be needed or adjusted.

66 McQuay OM 844-1

McQuay OM 844-1


WARNING






Table 41: Parameter Settings

Parameter Description

AU1 tYP

Automatic acceleration/deceleration

AU4

Automatic function setting

FMOd

Frequency setting mode selection 1

Default setting

FM

Meter adjustment

Fr

Forward/reverse run selection (Operation panel)

ACC

Acceleration time 1

DEC

Deceleration time 1

FH

Maximum frequency

UL

Upper limit frequency

LL

Lower limit frequency

J7

Base frequency 1

J7J

Pt

Base frequency voltage 1

V/F control mode selection 1

J>

Torque boost 1 tHr

Motor electronic-thermal protection level 1

OLM

Electric-thermal protection characteristic selection

F109

Analog/contact input function selection (VIA/VIB)

F110

Always-active function selection

F111

Input terminal selection1 (F)

F112

Input terminal selection 2 (R)

F113

Input terminal selection 3 (RES)

F118

Input terminal selection 8 (VIA)

F130


F270

Jump frequency 1

F271

Jump width 1

F272

Jump frequency 2

F273

Jump width 2

F274

Jump frequency 3

F275

Jump width 3

F300

PWM carrier frequency

F303

Retry selection (number of times)

F312

Random mode

McQuay

Setting

VFD Default

6

5

0

0

1

0

0

0

0

7

4

6

10

1

0

1

56

318

0

60

60

1

1

1 1

Last Entry 0

1

0

0

0

10

10

60

60

50

50

15 0

Fan Motor 50

Fan Motor Fan Motor

1 1

5 5

Fan Motor Fan Motor

7

4

6

10

1

2

0

0

0

0

0

0

0

0

Fan Motor

3

0

67




F602 Inverter trip retention selection

F605

Output phase failure detection mode selection

F608

Input phase failure detection mode selection

F626 Over-voltage stall protection level

F627

Under-voltage trip/alarm selection

F632

Thermal memory selection

F710

Standard monitor display selection

F880

Rooftop or self-contained application

NOTE: Fan Motor = Varies with the fan motor.

McQuay

Setting

0

1

0

107

0

3

1

140

VFD Default

0

0

0

0

0

4

1

140

68 McQuay OM 844-1

McQuay OM 844-1


Rooftop and Self-Contained with MicroTech II

Controls for SAF, RAF, and EAF Applications


SW4

SOURCE

PLC

SINK

SW4

F

PLC P24 CC

R RES FM

FLA FLB FLC RY RC

FM VIA

V

I

V

I

SW2 SW3

Factory Wiring to Terminal Strip in Main Control Box

PP VIA VIB CC

Bypass

Contact

Run

Enable

Contact

Decrease

Speed

Contact

Increase

Speed

Contact

Speed

Feedback

Signal

NOTE: Contacts and wire terminations are in the unit control panel.

Common to

Unit Controller


SW 4: Source (up)

FM: Voltage (up)

VIA: Voltage (up)



VFDs with MicroTech II controls are also factory configured and started. Table 42 lists

the parameters that have been specifically configured for McQuay or else may need owner adjustment as described in this manual.


• “McQuay Settings” are the recommended settings for McQuay units that control the speed of an energy recovery wheel.


69


70

WARNING








AU1 tYP


AU4


FMOd


Default setting

FM

Meter adjustment

Fr


ACC

Acceleration time 1

DEC

Deceleration time 1

FH

Maximum frequency

UL


LL


J7

Base frequency 1

J7J

Pt



J>

Torque boost 1 tHr


OLM


F109


F110


F111


F112


F113


F118


F130


F132

Output terminal selection

F268

Initial up/down frequency

F269

Change of initial up/down frequency

F270

Jump frequency 1

F271

Jump width 1

F272

Jump frequency 2

F273

Jump width 2

F274

Jump frequency 3

F275

Jump width 3

McQuay

Setting

VFD Default

0

0

0

0

0

0

0

5

15

41

42

43

14

1

2

0

56

318

0

60

60

1

1

5 1

Last Entry 0

1

0

0

0

10

10

60

60

50

50

15 0

Fan Motor 50

Fan Motor Fan Motor

1 1

5 5

Fan Motor Fan Motor

0

0

0

0

0

1

0

11

0

7

4

6

10

1

2

0

0

McQuay OM 844-1




F300 PWM carrier frequency

F303


F312

Random mode

F602 Inverter trip retention selection

F605


F608


F626

Over-voltage stall protection level

F627


F632


F710


F880



McQuay

Setting

4

1

140

0

1

0

6

5

1

0

108

VFD Default

0

0

0

4

1

140

0

0

0

Fan Motor

3

McQuay OM 844-1 71


Rooftop Controls by Others for SAF, RAF, and

EAF Applications

The MD2 has been made to McQuay’s specifications. However, McQuay assumes no responsibility for field installed controls. Commonly used control connections and

switch positions are shown in Figure 23. Table 43 lists parameters settings that are

often used with analog control or often require field adjustment. The user or installer should consult the OEM vendor’s operation and maintenance manual for more details at www.us.schneider-electric.com.


SW4

SOURCE

PLC

SINK

SW4

F

PLC P24 CC

R RES FM

FLA FLB FLC RY RC

Run

Fault

FM VIA

V

I

V

I

SW2 SW3

PP VIA VIB CC

Field Wiring


(use shielded cable and common drain in main control box)

Common to

Unit Controller

0 - 10 Vdc Control

(change the connection from

VIA to VIB for 4 - 20 mA control)


SW 4: Source (up)

FM: Voltage (0 - 10 = up)

VIA: Voltage (0 (adjustable) - 20 = down)

72 McQuay OM 844-1

McQuay OM 844-1





AU1 tYP


AU4


FMOd


Default setting

FM

Meter adjustment

Fr


ACC

Acceleration time 1

DEC

Deceleration time 1

FH

Maximum frequency

UL


LL


J7

Base frequency 1

J7J

Pt



J>

Torque boost 1 tHr


OLM


F109


F110


F111


F112


F113


F118


F130


F270

Jump frequency 1

F271

Jump width 1

F272

Jump frequency 2

F273

Jump width 2

F274

Jump frequency 3

F275

Jump width 3

F300


F303


F312

Random mode

F602

Inverter trip retention selection

F605


F608


F626


F627


F632


F710


F880


* Unit ships with VFD default parameter settings.


Suggested

McQuay

Setting*

VFD Default

6

5

0

0

0

0

0

0

7

4

1

10

0

2

1

0

1

0

140

0

110

4

1

1

0

318

0

60

60

1

1

1 1

Last Entry 0

1

0

0

0

10

10

60

60

50

50

15 0

Fan Motor 50

Fan Motor Fan Motor

1 1

5 5

Fan Motor Fan Motor

0

0

4

1

140

0

0

0

0

7

4

6

10

1

2

0

0

0

0

0

0

0

0

Fan Motor

3

73


Rooftop Energy Recovery Wheel Speed Control


SW4

SOURCE

PLC

SINK

SW4

F

PLC P24 CC

R RES FM

FLA FLB FLC RY RC

FM VIA

V

I

V

I

SW2 SW3


Decrease

Speed

Contact

PP VIA VIB CC

Bypass

Contact

Run

Enable

Contact

Increase

Speed

Contact

Speed

Feedback

Signal

Common to

Unit Controller


SW 4: Source (up)

FM: Voltage (up)

VIA: Voltage (down)



VFDs that control the speed of an energy recovery wheel are also factory configured

and started. Table 44 lists the parameters that have been specifically configured for

McQuay or else may need owner adjustment as described in this manual.


• “McQuay Settings” are the recommended settings for McQuay units that control the speed of an energy recovery wheel.


74 McQuay OM 844-1

McQuay OM 844-1


WARNING








AU1 tYP


AU4


FMOd


Default setting

FM

Meter adjustment

Fr


ACC

Acceleration time 1

DEC

Deceleration time 1

FH

Maximum frequency

UL


LL


J7

Base frequency 1

J7J

Pt



J>

Torque boost 1 tHr


OLM


F109


F110


F111


F112


F113


F118


F130


F132

Output terminal selection

F268

Initial up/down frequency

F269

Change of initial up/down frequency

F270

Jump frequency 1

F271

Jump width 1

F272

Jump frequency 2

F273

Jump width 2

F274

Jump frequency 3

McQuay

Setting

VFD Default

0

0

0

0

0

0

5

15

41

42

43

14

2

2

0

56

318

0

90

90

0

1

5 1

Last Entry 0

1

0

0

0

10

10

60

60

50

50

5 0

Fan Motor 50

Fan Motor Fan Motor

1 1

5 5

Fan Motor Fan Motor

0

0

0

0

1

0

11

0

7

4

6

10

1

2

0

0

75




F275 Jump width 3

F300


F303


F312 Random mode

F602

Inverter trip retention selection

F605


F608


F626


F627


F632


F710


F880



McQuay

Setting

0

4

1

140

5

1

0

6

0

1

0

111

VFD Default

0

0

0

0

0

4

1

140

3

0

0

Fan Motor

76 McQuay OM 844-1

/2.68

T2_115VAC

/3.11

T3_24V

SRC

207

TB2

45

SOURCE 9-16

WIRED INTERNAL

TO MOTHERBOARD

MJ45


Figure 25: Typical VFD Control Wiring

TB2

42

7

R67

8

/3.11

T3_COM

MCB

BO1

1 1NO

207

SUPPLY FAN jprs

24V SRC

MCB BO2 jprs

24V SRC

2 2NO

207

RETURN FAN

MCB BO13 jprs

24V SRC

13

207

13NO

MCB BO14 jprs

24V SRC

14

207

14NO

MCB

BO15 jprs

24V SRC

15

207

15NO

MCB BO16 jprs

24V SRC

16

207

16NO

MCB BO11 jprs

24V SRC

11

207

11NO

+PP

PL18

7

R25

5

604

3

1

+GB

R20

3

R68

7

H1DN

R46_47

8

H1C

H1UP

H1DN

R48_49

H1C

H1UP

+PP

PL18

6

/1.68

T1_N

+PP

PL7

3

+BB

MMP30

75

133

76

+PP

PL7

6

+PP

PL8

1

+BB

MMP40

75

145

76

+PP

PL8

4

SIG_1/6.01

S4

SUPPLY

AIR

1C

(INVERTER)

1NC

(OFF)

1NO

427A

(BYPASS)

S4

RETURN

AIR

2C

(INVERTER)

2NC

(OFF)

2NO

431A

(BYPASS)

R67

5

401

3

12

+PP

PL7

H425-12

427B

+PP

PL7

9

H427-9

R69

7

10

+PP

PL8

H429-10

8

R68

6

404

4

+PP

PL8

7

H431-7

A1

I

+BB

M30I

H425-2

A2

A1

B

+BB

M30B

A2

A1

I

+BB

M40I

H429-11

A2

A1

B

+BB

M40B

A2

+PP

PL7

2

+PP

PL8

11

FLA FLC

F R VIA

+NB

AFD10

SAF

SQD21

NC NC NC P24 RES

137

261

H443A

H443-7

13

+BB

M30I

H443-14

14

425

14

+PP

PL7

445A

R67

6

401

4

443C

H2UP

INCR

H2V

R46_47

405

H2DN

DECR

FLA FLC

F R VIA

+NB

AFD20

RAF

SQD21

NC

NC NC P24 RES

149

264

H443C

H443-12

13

+BB

M40I

H443-15

14

430

15

+PP

PL8

445C

R68

5

404

3

443G

H2UP

INCR

H2V

R48_49

409

H2DN

DECR

McQuay OM 844-1 77


PB11

L1-3

L2-3

L3-3

108

137

138

139

CB10

T1

H137

H138

T2

H139

T3

Figure 26: Typical VFD Power Wiring

+BB

MMP30

L1A

L1B

L2A

L2B

L3A

L3B

T1A

T1B

T2A

T2B

T3A

T3B

426

+NB

AFD10

133A

L1 U

134A

135A

H140

L2

L3

V

GND

440

W

GND10

G

137A

138A

139A

+BB

M30B

L1

L2

T1

T2

L3 T3

427

+BB

M30I

L1

L2

T1

T2

L3 T3

425

PB11

L1-5

L2-5

L3-5

108

149

150

151

CB20

T1 H149

H150

T2

H151

T3

G

GND20

145A

146A

147A

H152

L1A

L1B

L2A

L2B

L3A

L3B

+BB

MMP40

T1A

T1B

T2A

T2B

T3A

T3B

426

+NB

AFD20

L1 UTI

L2

L3

VT2

GND

WT3

440

149B

150B

151B

+BB

M40B

L1

L2

T1

T2

L3 T3

432

+BB

M40I

L1

L2

T1

T2

L3 T3

430

HSAF-1

HSAF-2

HSAF-3

T1

+NB

SUPPLY-FAN

MTR

T2

T3

HRAF-1

HRAF-2

HRAF-3

T1

+NB

RETURN-FAN

MTR

T2

T3

78 McQuay OM 844-1

McQuay Training and Development

Now that you have made an investment in modern, efficient McQuay equipment, its care should be a high priority.

For training information on all McQuay HVAC products, please visit us at www.mcquay.com and click on training, or call 540-248-9646 and ask for the Training Department.

Warranty

All McQuay equipment is sold pursuant to its standard terms and conditions of sale, including Limited Product

Warranty. Consult your local McQuay Representative for warranty details. Refer to Form 933-43285Y. To find your local McQuay Representative, go to www.mcquay.com.

This document contains the most current product information as of this printing. For the most up-to-date product information, please go to www.mcquay.com.

© 2007 McQuay International • www.mcquay.com • 800-432-1342

MD2 Variable Speed Drive Controllers

Operation and Maintenance Manual OM 844-1

MD2 Variable Speed Drive Controllers

Packaged Rooftop Units RPS, RFS, RDT, RPE, and RDE

Rooftop Air Handler Units RDS and RAH

Vertical Self-Contained Units SWP and SWT

Commercial Packaged Rooftop Units MPS 030 to 050 Tons

Introduction

Applications With MicroTech II Control (A1a, A2,

B1a, B2, C, and D)

Applications Without MicroTech II Controls (A1b and B1b)

Replacement VFD

Hazard Categories and Special Symbols

Before You Begin

Bus Voltage Measurement Procedure

Initial Start-Up

Control Terminals

Switch Settings and Terminal Designations

Integrated Display Terminal

Programming

Mode Access

Parameter Groups

Access to Menus and Parameters

AUF Quick Menu

AUF Quick Menu Parameters

Setting the Acceleration/Deceleration

Ramp Times

Acceleration/Deceleration Ramp Adaptation

Manually Setting Acceleration/Deceleration Ramp Times

Setting the Macro Function

Setting the Mode of Operation

Command Mode Selection

Frequency Mode Selection

Default Setting

Forward/Reverse Run Selection

Maximum Frequency

High Speed and Low Speed

Nominal Motor Frequency and Voltage

Settings

V/Hz Control Mode Selection

Voltage Boost (Energy Recovery

Application Only)

Electronic Motor Overload Protection

Setting tHr, and OLM

Self Cooled Motors

Motor Electric Thermal Protection Retention, 2)&%

Input Signal Selection

Terminal Function Selection

Modifying Input Terminal Functions

Modifying Output Terminal Functions

Jump Frequency (Jumping

Resonant Frequencies)

Switching Frequency

Auto Restart

Drive Controller Fault Retention

Output Phase Loss Detection

Input Phase Loss Detection

Avoiding Overvoltage Tripping

Undervoltage Fault

Changing the Display Parameter

Troubleshooting Fault and Alarm Codes

Drive Controller Fault Conditions

Drive Controller Alarm Conditions

Pre-Alarm Displays

Resetting the Drive Controller After a

Fault Condition

Appendix A—Input Terminal Functions

Appendix B—Output Terminal Functions

Appendix C—Receiving and Preliminary

Inspection

Storing and Shipping

Lifting and Handling

Precautions

Appendix D—Wiring Recommendations

Field Control Wiring and General Background for

Reconnecting Wiring to a Replacement VFD

Branch Circuit Protection and General Background for

Reconnecting a Replacement VFD

Grounding

208 - 230 Volt, 7.5 - 10 HP VFDs