Full Digital Module Technical Guide
Factory Packaged Controls
Tulsa
Full Digital Module
Technical Guide
Table of Contents
OVERVIEW ........................................................................................................................................................ 3
INSTALLATION AND WIRING ........................................................................................................................... 4
Environmental Requirements .......................................................................................................................................................4
Mounting.......................................................................................................................................................................................4
Power Supply and Communications ............................................................................................................................................4
Important Wiring Considerations ..................................................................................................................................................5
VCM-X Modular E-BUS Controller to Full Digital Module Wiring .................................................................................................6
START-UP AND COMMISSIONING.................................................................................................................... 8
General.........................................................................................................................................................................................8
Unit Configurations .......................................................................................................................................................................8
MODES OF OPERATION ................................................................................................................................... 9
Digital Stage 1 / Digital Stage 2....................................................................................................................................................9
Off Mode.......................................................................................................................................................................................9
Cooling Mode ...............................................................................................................................................................................9
Heat Pump Heating Mode (Air to Air) ...........................................................................................................................................9
Dehumidification Mode .................................................................................................................................................................9
Defrost Mode ................................................................................................................................................................................9
Staging Delays .............................................................................................................................................................................9
TROUBLESHOOTING ...................................................................................................................................... 10
Using LEDs to Verify Operation..................................................................................................................................................10
LED Diagnostics .........................................................................................................................................................................12
Suction Pressure Transducer Testing.........................................................................................................................................13
APPENDIX ...................................................................................................................................................... 14
VCM-X Controller to Full Digital Module Wiring .........................................................................................................................14
PART NUMBER CROSS REFERENCE TABLE
PART DESCRIPTION
ORION
AAON
VCM-X Full Digital Module
OE370-23-FDM-A
R74870
VCM-X Modular Controller
OE332-23-VCMX-MOD-A
R90800
VCM-X Modular E-BUS Controller
OE332-23E-VCMX-MOD-A
V07150
VCM-X E-BUS Distribution Module
OE365-23-EBD-A
R82930
VCM-X Expansion Module
OE333-23-EM
R69190
VCM-X 12 Relay Expansion Module
OE358-23-12R
R69180
VCM-X One Condenser Head Pressure Module
OE370-23-HP1C
R74860
VCM-X Two Condenser Head Pressure Module
OE370-23-HP2C
R90230
www.aaon.com
WattMaster Controls Inc.
8500 NW River Park Drive · Parkville , MO 64152
Toll Free Phone: 866-918-1100
PH: (816) 505-1100 · FAX: (816) 505-1101
E-mail: mail@wattmaster.com
Visit our web site at www.orioncontrols.com
WattMaster Form : AA-FDM-TGD-01G
Copyright July 2016 WattMaster Controls, Inc.
AAON Manual Part Number: R84500
AAON® is a registered trademark of AAON, Inc., Tulsa, OK.
Neither WattMaster Controls, Inc. nor AAON®
assumes any responsibility for errors or omissions in this document.
This document is subject to change without notice.
Full Digital Module
Module Overview
Overview
The Full Digital Module (OE370-23-FD-A) is a device that enables and
modulates up to four digital compressors on HVAC Units controlled
by the VCM-X Modular Controller (OE332-23-VCMX-MOD-A) or
VCM-X Modular E-BUS Controller (OE332-23E-VCMX-MOD-A).
The Full Digital Module will control the digital compressors to satisfy
the cooling, dehumidification, and heat pump requirements of the VCMX Modular series controller.
If the Full Digital Module is in the Cooling Mode or Heat Pump Heating Mode, it will modulate the compressors to maintain the appropriate
Supply Air Temperature Setpoint. If the module is in the Dehumidification Mode, it will modulate compressors to maintain the Coil Suction
Temperature Setpoint. If the module is in the Heat Pump Heating Mode,
the module can also monitor a signal for a Defrost Cycle from the VCMX Modular series controller if a One Condenser Head Pressure Module
(OE370-23-HP1C) is also installed.
The Full Digital Module is connected to the VCM-X Modular Controller using the E-BUS Distribution Module (OE365-23-EBD). The Full
Digital Module can also be directly connected to the VCM-X Modular
E-BUS Controller. Either connection allows the Full Digital Module
to receive setpoints and monitor the Supply Air Temperature from the
VCM-X Modular series controller. The Full Digital Module requires a
24 VAC power connection with an appropriate VA rating.
NOTE: The Full Digital Module contains no user-serviceable
parts. Contact qualified technical personnel if your
module is not operating correctly.
R12
R53
4751
R54
4751
4751
4751
R11
TB3
D3
+5V
SIG 1
R1
1003
D4
R2
1002
GND
D12
10uF
R3
D13
R4
+5V
1003
Rc
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SERIAL #
SIG 2
1002
GND
10uF
C2
RELAYS
ANALOG
+5V
SIG 3
AO1
1003
1002
GND
AO2
10uF
GND
+5V
SIG 4
1003
PWM1-
1002
GND
R9
R13
COM
300
R23
1002
PWM2PWM2+
SW2
1002
OPTIONS
R24
R25
R26
1002
1002
1002
1002
1002
1002
OFF
1
2
4
8
4
OFF
ADDRESS
300
R14
BIN 2
4
R34 R50
R7
BIN 1
PWM1+
10uF
R30
R29
R28
ALARM
STAT
COMM
SW1
C20
PWR
.01uF
Figure 1: Full Digital Module
Technical Guide
3
Full Digital Module
Installation and Wiring
Environmental Requirements
Power Supply and Communications
The Full Digital Module needs to be installed in an environment which
can maintain a temperature range between -30°F and 150°F and not
exceed 90% RH levels (Non-Condensing).
The Full Digital Module is connected to the E-BUS Distribution Module with a modular HSSC cable to provide communications from the
VCM-X Modular Controller. The E-BUS Distribution Module uses
WattMaster Control’s standard I2C modular cable to connect with the
VCM-X Modular Controller, VCM-X Expansion Module, or 12-Relay
Expansion Module.
Mounting
The Full Digital Module is housed in a plastic enclosure. It is designed
to be mounted by using the 3 mounting holes in the enclosure base. It is
important to mount the module in a location that is free from extreme high
or low temperatures, moisture, dust, and dirt. Be careful not to damage
the electronic components when mounting the module.
See Figure 2 for Module dimensions (dimensions are in inches).
The Full Digital Module can also be directly connected to the VCM-X
Modular E-BUS Controller, bypassing the use of the E-BUS Distribution Module.
The Full Digital Module requires a 24 VAC power supply with an appropriate VA rating.
WARNING:
Observe polarity! All boards must be wired
GND-to-GND and 24 VAC-to-VAC. Failure to
observe polarity could result in damage to the
boards.
5.71
0.18 DIA. TYP.
0.29
R12
R53
R54
4751
4751
4751
4751
R11
TB3
D3
+5V
R1
SIG 1
1003
GND
10uF
D4
R2
1002
D12
R3
D13
R4
+5V
1003
Rc
www.orioncontrols.com
SERIAL #
SIG 2
1002
GND
10uF
C2
RELAYS
ANALOG
+5V
SIG 3
AO1
1003
1002
5.64
GND
5.04
AO2
10uF
GND
+5V
SIG 4
1003
PWM1-
1002
GND
R9
R13
COM
4
300
R23
1002
PWM2+
SW2
1002
OPTIONS
R24
R25
R26
PWM2-
1002
1002
1002
1002
1002
OFF
ADDRESS
1002
OFF
1
2
4
8
300
R14
BIN 2
4
R34 R50
R7
BIN 1
PWM1+
10uF
R30
R29
R28
ALARM
STAT
COMM
SW1
C20
.01uF
PWR
2.07
0.55
4.14
Note: Height is 1.49 inches.
Figure 2: Full Digital Module Dimensions
4
Technical Guide
Full Digital Module
Installation and Wiring
Important Wiring Considerations
4.
Be sure that all wiring connections are properly inserted
and tightened into the terminal blocks. Do not allow wire
strands to stick out and touch adjoining terminals. This
could potentially cause a short circuit.
5.
Be sure all modular wiring harness connectors are seated
firmly in their respective modular connectors on the circuit
board.
Please carefully read and apply the following information when wiring
the Full Digital Module:
1.
The 1 to 5 VDC signals for the Copeland Compressor
Speed need to use 18-gauge shielded twisted pair cable, and
the Drain wire must be the GND signal.
2.
All 24 VAC wiring must be connected so that all ground
wires remain common. Failure to follow this procedure can
result in damage to the module and connected devices.
3.
All wiring is to be in accordance with local and
national electrical codes and specifications.
P5
NOTE: The Compressor Relays on the Full Digital Module
are used rather than the relay outputs on the VCM-X
Modular series controller.
WARNING:
Be sure all controllers and modules are
powered down before connecting or
disconnecting HSSC cables.
SHLD P4
P6
EXC
P3
C1
OUT
P2
C2
COM
P1
RD
WH
BK
OE275-01 Suction
Pressure Transducer
Copeland Digital
Compressor Controller A1
NOTE: ALL RELAY OUTPUTS
ARE NORMALLY OPEN AND
RATED FOR 24 VAC POWER
ONLY. 1 AMP MAXIMUM LOAD.
OE370-23-FD-A
Full Digital Module
P5
SHLD P4
P6
EXC
P3
C1
OUT
P2
C2
COM
P1
RD
WH
BK
OE275-01 Suction
Pressure Transducer
Copeland Digital
Compressor Controller A2
P5
EXC
P3
C1
OUT
P2
COM
R2
GND
R3
+5V
R4
SIG 2
Rc
BK
P1
AO2
GND
GND
OE275-01 Suction
Pressure Transducer
Copeland Digital
Compressor Controller B1
AO1
AO2
AO1
SIG 3
GND
HVAC UNIT CONNECTIONS
ANALOG
+5V
SIG 3
COMPRESSOR A1 ENABLE
COMPRESSOR A2 ENABLE
COMPRESSOR B1 ENABLE
COMPRESSOR B2 ENABLE
RELAYS
GND
RD
WH
R1
R2
R3
R4
R1
SIG 1
SIG 2
GND
SHLD P4
P6
C2
+5V
SIG 1
GND
+5V
SIG 4
GND
SIG 4
PWM1-
GND
PWM1+
BIN 1
PWM2PWM2+
BIN 2
COM
C1
OUT
P2
C2
COM
P1
ADDRESS
RD
P3
WH
BK
Copeland Digital
Compressor Controller B2
OE275-01 Suction
Pressure Transducer
If Using One
Module, Set
Addresses To
Off. If Using
Two Modules,
Set Addresses
Consecutively.
Connect To E-BUS
Distribution Module or
VCM-X Modular E-BUS Controller
ALARM
STAT
COMM
PWR
HSSC Cable
24 VAC
EXC
GND
SHLD P4
OPTIONS
P5
P6
This Dip
Switch Is Not
Used For This
Application
WARNING!!
Observe Polarity! All
boards must be wired
with GND-to-GND and
24 VAC-to-24 VAC.
Failure to observe
polarity could result in
damage to the boards.
Line Voltage
24 VAC Transformer
3 VA Minimum
HSSC Cable
Connect To Other
WattMaster-Approved
E-BUS Expansion Module(s)
Figure 3: Full Digital E-BUS Connection Wiring
Technical Guide
5
Full Digital Module
Installation and Wiring
VCM-X Modular E-BUS Controller to
Full Digital Module Wiring
Any E-BUS Module can be connected to the E-BUS Controller’s E-BUS
port or can be daisy-chained together using HSSC cables.
The Full Digital Module directly connects to the VCM-X Modular EBUS Controller using a modular HSSC cable. The Full Digital Module
requires a 24 VAC power connection with an appropriate VA rating. See
Figure 4 below for wiring.
NOTE: Contact Factory for the correct HSSC cable length for
your application. Cables are available in ½ and 3 meter
lengths and 100 and 150 foot lengths.
OE370-23-FD-A
Full Digital Module
+5V
R1
SIG 1
R2
GND
R3
+5V
R4
SIG 2
Rc
RELAYS
GND
ANALOG
+5V
AO1
SIG 3
AO2
GND
GND
+5V
SIG 4
PWM1-
GND
PWM1+
BIN 1
PWM2PWM2+
BIN 2
COM
OPTIONS
ADDRESS
ALARM
STAT
COMM
WARNING!!
Observe Polarity! All boards must be
wired with GND-to-GND and 24 VACto-24 VAC. Failure to observe polarity
could result in damage to the boards.
24 VAC
PWR
GND
If Using One Module,
Set Addresses To Off.
If Using Two Modules,
Set Addresses
Consecutively.
This Dip Switch Is
Not Used For This
Application
Line Voltage
24 VAC Transformer
3 VA Minimum
Connect To Other
WattMaster-Approved
E-BUS Expansion Module(s)
HSSC Cable
HSSC Cable
Connect To VCM-X E-BUS Controller
Figure 4: VCM-X Modular E-BUS Controller to Full Digital Module Wiring Diagram
6
Technical Guide
Full Digital Module
Installation and Wiring
WARNING:
Be sure all controllers and modules are
powered down before connecting or
disconnecting HSSC cables.
For Stand Alone Applications,
Connect To System Manager. For Network
Applications Connect To Next Controller
And/Or MiniLink PD On Local Loop.
Note:
All Relay Outputs Are Normally Open And
Rated For 24 VAC Power Only.
1 Amp Maximum Load.
OE332-23E-VCMX-MOD-A
VCM-X Modular
E-BUS Controller
Local Loop
RS-485
9600 Baud
RS-485 COMMUNICATION LOOP. WIRE
“R” TO “R”, “T” TO “T” “SHLD” TO “SHLD”
R - 24VAC
RELAY CONTACT
RATING IS 1 AMP
MAX @ 24 VAC
G - Fan ON/OFF Only
RELAY
COMMON
All Comm Loop Wiring Is
Straight Thru
T to T, R to R & SHLD to SHLD
FAN
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RELAY 2
RELAY 3
RELAY 4
RELAY 5
Relay Output Contacts
R2 Through R5 May Be User-Configured
For The Following:
1 - Heating Stages
2 - Cooling Stages
3 - Warm-up Mode Command (VAV Boxes)
4 - Reversing Valve (Air To Air Heat Pumps)
5 - Reheat Control (Dehumidification)
6 - Exhaust Fan Interlock
7 - Preheater For Low Ambient Protection
8 - Alarm
9 - Override
10 - Occupied
11 - OA Damper
12 - Heat Wheel
13 - Emergency Heat
Note: 1.) When Using the HP2C Module,
All Compressors Will Be Wired From the
Protection Module, Not the VCM-X Controller.
Note: A Total Of 20 Relays Are Available By
Adding Relay Expansion Modules. All
Expansion Module Relay Outputs Are User
Configurable As Listed Above.
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AAON No.:
V07150
VCM-X MODULAR E-BUS CONTROLLER
Orion No.:OE332-23E-VCMX-MOD-A
AI1 = SPC (SPACE TEMPERATURE SENSOR)
AI2 = SAT (SUPPLY AIR TEMPERATURE SENSOR)
AI3 = RAT (RETURN AIR TEMPERATURE SENSOR)
AI4 = OAT (OUTDOOR AIR TEMPERATURE SENSOR)
AI5 = SUCTION PRESSURE SENSOR (FROM EXP. MODULE)
AI7 = SPACE TEMPERATURE SENSOR SLIDE ADJUST
OR VOLTAGE RESET SOURCE
A01 = ECONOMIZER (2-10 VDC OUTPUT)
A02 = SUPPLY FAN VFD (0-10 VDC OUTPUT)
HSSC Cable Connect To
VCM-X E-BUS Port
E-BUS
CONNECTOR
ANALOG INPUT
JUMPER
SETTINGS
AI1 SET
See Individual
Component Wiring
Diagrams For
Detailed Wiring Of
Analog Inputs And
LED BLINK CODES
LED NAME
STATUS1
STATUS2
0
1
AI1
THERM
4-20mA
0-10V
0-5V
SAT FAIL
1
2
OAT FAIL
2
2
AI2
THERM
4-20mA
0-10V
0-5V
SPC FAIL
3
MODULE ALARM
4
2
THERM
4-20mA
0-10V
0-5V
MECH COOL FAIL
1
3
MECH HEAT FAIL
2
3
FAN PROOF FAIL
3
3
THERM
4-20mA
0-10V
0-5V
DIRTY FILTER
AI4
AI5
THERM
4-20mA
0-10V
0-5V
THERM
4-20mA
0-10V
0-5V
PUSH BUTTON OVR
AI7
AI3
NORMAL OPERATION
3
AI2 SET
EMERGENCY SHUTDOWN
5
3
LOW SAT
1
4
HIGH SAT
2
4
CONT. TEMP COOL FAIL
3
4
CONT. TEMP HEAT FAIL
4
1
4
5
ZONE OVR
2
5
OUTPUT FORCE ACTIVE
0
6
AI3 SET
ANALOG INPUT JUMPER SETTINGS
MUST BE SET AS SHOWN FOR
PROPER OPERATION
STATIC
PRESSURE
4
2
WattMaster Label
#LB102073-01-A
Rev.: 1A
GND
Line Voltage
24 VAC POWER ONLY
WARNING! POLARITY MUST BE OBSERVED
OR THE CONTROLLER WILL BE DAMAGED
2
IC
EXPANSION
24VAC
2
IC DIGITAL
SENSOR
AI4 SET
Size Transformer For Correct
Total Load.
VCM-X Modular Controller = 8
Jumpers
AI5 SET
Splice If Required
Connect To Digital Room Sensor And/Or
Digital CO2 Sensor
AI7 SET
Connect To
Expansion Module(s)
(When Used)
OE271
Static Pressure
Transducer
Warning:
24 VAC Must Be Connected So That All Ground
Wires Remain Common. Failure To Do So Will
Result In Damage To The Controllers.
Connect FRP Tubing To High Pressure
Port (Bottom Tube) and Route To Static
Pressure Pickup Probe Located In Unit
Discharge. Leave Port Marked “Lo” Open
To Atmosphere
Figure 4, cont.: VCM-X E-BUS Controller to Full Digital Module Wiring Diagram
Technical Guide
7
Full Digital Module
Start Up and Commissioning
General
In order to have a trouble free start-up, it is important to follow a few
simple procedures. Before applying power for the first time, it is very
important to run through a few simple checks.
One of the most important checks to make before powering up the system
for the first time is to make sure that the VCM-X Modular or VCM-X
Modular E-BUS Controller is configured properly for your application.
Refer to the VCM-X Controller Technical Guide or VCM-X Modular
E-BUS Controller Technical Guide for more information. A handheld
Modular Service Tool, Modular System Manager, or System Manager
Touch Screen connected to the VCM-X Modular or VCM-X Modular
E-BUS Controller will allow you to configure your application. Refer to
the VCM-X / RNE Operator’s Interfaces SD Technical Guide or System
Manager TS II Technical Guide for more information.
Check all wiring leads at the terminal block for tightness. Be sure that
wire strands do not stick out and touch adjacent terminals. Confirm
that all sensors required for your system are mounted in the appropriate
location and wired into the correct terminals.
WARNING:
Observe polarity! All boards must be wired
GND-to-GND and 24 VAC-to-VAC. Failure to
observe polarity could result in damage to the
boards.
UNIT CONFIGURATIONS
SYSTEM A
PERMUTATION
SYSTEM B
HARDWARE
VCM-X WSHP
CONFIGURATION
Comp A1
Comp A2
Comp B1
Comp B2
Relay 1
Relay 2
Relay 3
Relay 4
1
On/Off
On/Off
Use VCM-X Modular
Series Controller Only
2 Compressors
2
Digital
On/Off
Use VCM-X Modular
Series Controller Only
2 Compressors
Digital Compressor
3
Digital
Digital
Use VCM-X Modular
Series Controller and
Full Digital Module
2 Compressors
Full Digital
4
On/Off
On/Off
On/Off
On/Off
Use VCM-X Modular
Series Controller Only
4 Compressors
5
Digital
On/Off
On/Off
On/Off
Not Available
4 Compressors
Digital Compressor
4 Compressors
Full Digital
6
Digital
On/Off
Digital
On/Off
Use VCM-X Modular
Series Controller Only
7
Digital
Digital
Digital
Digital
Use VCM-X Modular
Series Controller and
Full Digital Module
Not Available
In the Cooling Mode, the Compressors will stage in the following order:
Permutations 1, 2 & 3: Compressor A1 -> Compressor A2
Permutations 4: Compressor A1 -> Compressor A2 -> Compressor B1 -> Compressor B2
Permutations 6: Compressor A1 & Compressor A2 -> Compressor B1 -> Compressor B2
Permutations 7: Compressor A1 & Compressor A2 -> Compressor B1 & Compressor B2
In the Dehumidification Mode, the Compressors will stage in the following order:
Permutation 4: Compressor A1 & Compressor A2 -> Compressor B1 -> Compressor B2
All other permutations in the Dehumidification Mode stage as described in the Cooling Mode.
Table 1: Unit Configurations Chart
8
Technical Guide
Full Digital Module
Modes of Operation
NOTE: See Unit Configurations Chart on page 10 for more
information about compressor staging.
Digital Stage 1 / Digital Stage 2
On units with two Digital Scroll Compressors, the first compressor (A1)
will be designated as Digital Stage 1 and the second compressor (A2)
will be designated as Digital Stage 2.
On units with four Digital Scroll Compressors, there may be instances
where compressor numbers on the module do not correlate with the
mechanical compressors’ numbers. Therefore, Digital Stage 1 refers to
the first set of Digital Scroll Compressors (A1/B1) that will stage on
together and Digital Stage 2 refers to the second set of Digital Scroll
Compressors (A2/B2) that will stage on together. Please refer to AAON’s
wiring diagram for specific wiring of the unit.
Off Mode
The Full Digital Module will be in the Off Mode when no signal is
being received from the VCM-X Modular series controller to run the
compressors.
Cooling Mode
When a Cool Signal is received, the Full Digital Module will go into
Cooling Mode. At this point, Compressor A1 (and B1*) will energize and
Digital Stage 1 Analog Output will modulate as necessary to maintain
the Supply Air Temperature at the Active Supply Air Setpoint that is
broadcast from the VCM-X Modular series controller.
When Digital Stage 1 reaches 100%, a stage up timer is started. If Digital
Stage 1 stays at 100% for the Stage Up timer, Compressor A2 (and B2*)
will energize and both Digital Stage 1 and Digital Stage 2 outputs will
go to 50% and begin to modulate together.
Heat Pump Heating Mode (Air to Air)
Heating Mode works the same as Cooling Mode except the Reversing
Valve is switched and the sequence is opposite. Compressors modulate
up when below the Heating Supply Air Setpoint and modulate down
when above the setpoint.
Dehumidification Mode
In Dehumidification Mode, compressors will be controlled to maintain
the Suction Pressure Temperature Setpoint. Digital Stage 1—Compressor A1 (and B1*) will modulate up to 100% before Digital Stage
2—Compressor A2 (and B2*) can be energized. When Digital Stage 2
is energized, Digital Stage 1 will be locked at 100%.
* If configured for 4 modulating compressors.
Defrost Mode
In Defrost Mode, if only Digital Stage 1 is energized, it will go to 100%
and the reversing valve will deactivate. If both Digital Stage 1 & Digital
Stage 2 are energized, they will both go to 100% and the reversing valve
will be deactivated. The duration for Defrost Mode is determined by the
VCM-X Modular series controller.
NOTE: Defrost Mode is only available if a One Condenser or
Two Condenser Head Pressure Module is installed.
Staging Delays
Staging Delays minimum run times and minimum off times are sent
from the VCM-X Modular series controller.
If both systems are energized and they go below 30% and the Supply Air
is below the Supply Air Setpoint by the Cooling Stage Window value,
the stage down timer is started. If the systems remain below 30% for
the duration of the stage down timer, Digital Stage 2 will deactivate and
Digital Stage 1 will go to 60%. Digital Stage 1 will stage down if it is
at 0% for the duration of the stage down timer.
* If configured for 4 modulating compressors.
Technical Guide
9
Full Digital Module
Troubleshooting
Using LEDs to Verify Operation
The Full Digital Module is equipped with LEDs that can be used to verify
operation and perform troubleshooting. There are LEDs for communication, operation modes, and diagnostic codes. The module has seven
LEDs—one used for power, one used for operation status, one used for
alarms, and four used for the compressor relays. See Figure 5 for the
LED locations. The LEDs associated with these inputs and outputs allow you to see what is active without using a voltmeter. The LEDs and
their uses are as follows:
Status LEDs
“COMM” - The COMM LED lights up to indicate Communications
between the module and the VCM-X Modular series controller. If Communications are established, the COMM LED will blink.
“STAT” - This is the status blink code LED. It will light up and every 10
seconds will blink the status mode that the module is currently operating
under. See Table 3 for Status Blink Code code descriptions. The blink
code descriptions are also located on the module’s front cover.
No. of Blinks
Status
1
Off Mode
2
Cool Mode
3
Heat Mode
4
Dehumidify Mode
5
Defrost Mode
Table 3: STAT LED Blink Codes
“ALARM” - This is the diagnostic blink code LED. It will light up
and blink out diagnostic codes. See Table 2 for Diagnostic Blink Code
descriptions. The blink code descriptions are also located on the module’s front cover.
No. of Blinks
Status
0
No Problems
1
Low Suction Pressure Compressor A1
2
Low Suction Pressure Compressor A2
3
Low Suction Pressure Compressor B1
4
Low Suction Pressure Compressor B2
5
Pressure Sensor A1 Not Detected
6
Pressure Sensor A2 Not Detected
7
Pressure Sensor B1 Not Detected
8
Pressure Sensor B2 Not Detected
9
No Communication
Table 2: ALARM LED Blink Codes
10
Technical Guide
Full Digital Module
Troubleshooting
Compressor LEDs
R12
4751
4751
R54
4751
“R2” - This LED will light up when Compressor A2 is enabled and will
stay lit as long as Compressor A2 is active.
4751
R11
“R1” - This LED will light up when Compressor A1 is enabled and will
stay lit as long as Compressor A1 is active.
R53
TB3
D3
R1
‚
D4
R2
D12
R3
D13
R4
“R3” - This LED will light up when Compressor B1 is enabled and will
stay lit as long as Compressor B1 is active.
SERIAL #
Rc
“R4” - This LED will light up when Compressor B2 is enabled and will
stay lit as long as Compressor B2 is active.
RELAYS
ANALOG
AO1
AO2
GND
PWM1PWM1+
R34 R50
PWM2PWM2+
SW2
OPTIONS
1002
1002
OFF
1002
1002
R30
R29
R28
ALARM
STAT
COMM

C20
.01uF
Figure 5: LED Locations
Technical Guide
11
Full Digital Module
Troubleshooting
LED Diagnostics
“PWR” LED: When the Full Digital Module is powered up, the PWR
LED (located below the address switches) should light up and stay on
continuously. If it does not light up, check to be sure that the power wiring is connected to the board, the connections are tight, and the VCM-X
Modular series controller is powered. If after making all these checks,
the PWR LED does not light up, the module is probably defective.
Other Checks
NOTE: The Full Digital Module contains no user-serviceable
parts. Contact qualified technical personnel if your
module is not operating correctly.
“COMM” LED: The COMM LED lights up to indicate Communications between the module and the VCM-X Modular series controller. If
the COMM LED does not blink, then communications have not been
established. Check the connection between the VCM-X Modular Controller, the VCM-X Modular E-BUS Controller, the E-BUS Distribution
Module, and the Full Digital Module.
“STAT” LED: As previously described, this LED will blink out the
operation mode that the Full Digital Module is operating under. When
the board is first powered up, the STAT LED will do the following:


Light up
Blink out status code every ten seconds to indicate
controller status
“ALARM” LED: As previously described, this LED will blink on and
off to indicate alarms and diagnostics.
12
Technical Guide
Full Digital Module
Troubleshooting
Temperature
°F
Pressure
PSI
Signal
DC Volts
See the OE275-01 Suction Pressure Transducer, Pressure, Temperature,
and Voltage Chart for R410A Refrigerant testing (Table 4). The chart
shows a temperature range from 20°F to 80°F. For troubleshooting purposes, the DC Voltage readings are also listed with their corresponding
temperatures and pressures.
Signal
DC Volts
Use the voltage column to check the Suction Pressure Transducer while
connected to the Full Digital Module. Read voltage with a meter set on
DC volts. If the temperature/voltage or pressure/voltage readings do
not align closely with the chart, your Suction Pressure Transducer is
probably defective and will need to be replaced.
Pressure
PSI
The Evaporator Coil Temperature is calculated by converting the Suction Pressure to Temperature. The Suction Pressure is obtained by using
the OE275-01 Suction Pressure Transducer, which is connected into the
Suction Line of the Compressor.
OE275-01 Suction Pressure Transducer Coil Pressure
– Temperature – Voltage Chart for R410A Refrigerant
Temperature
°F
OE275-01 Suction Pressure Transducer
Testing for R410A Refrigerant
21.19
80.94
1.8
59.03
168.10
3.2
24.49
87.16
1.9
61.17
174.32
3.3
27.80
93.39
2.0
63.19
180.55
3.4
30.99
99.62
2.1
65.21
186.78
3.5
33.89
105.84
2.2
67.23
193.00
3.6
36.80
112.07
2.3
69.24
199.23
3.7
39.71
118.29
2.4
71.15
205.46
3.8
42.30
124.52
2.5
72.95
211.68
3.9
44.85
130.75
2.6
74.76
217.91
4.0
47.39
136.97
2.7
76.57
224.14
4.1
49.94
143.2
2.8
78.37
230.36
4.2
52.23
149.42
2.9
80.18
236.59
4.3
54.50
155.65
3.0
56.76
161.88
3.1
Table 4: Coil Pressure/Voltage/Temp for OE275-01
Suction Pressure Transducers - R410A Refrigerant
Technical Guide
13
Full Digital Module
Appendix
VCM-X Modular Controller to Full
Digital Module Wiring
When using the VCM-X Modular Controller, the E-BUS Distribution
Module is required ot connect to the Full Digital Module. The Full Digital
Module connects to the E-BUS Distribution Module using a modular
HSSC cable. The Full Digital Module requires a 24 VAC power connection with an appropriate VA rating.
For Stand Alone Applications,
Connect To System Manager.
For Network Applications
Connect To Next Controller
And/Or MiniLink PD On Local Loop.
The E-BUS Distribution Module connects to the VCM-X Modular
Controller, VCM-X Expansion Module, or 12 Relay Expansion Module
using the I2C port. See Figure 6 below for wiring.
Any E-BUS module can be connected to each of the four E-BUS Distribution Module’s output ports or can be daisy-chained together using
HSSC cables.
If using a spliced terminal connection for longer runs, one module can be
connected to the E-BUS Distribution Module and any additional modules
would be daisy-chained to the first module. For more information, refer
to the E-BUS Distribution Module Technical Guide.
OE332-23-VCMX-MOD-A
VCM-X Modular Controller
Note:
All Relay Outputs Are Normally Open And Rated
For 24 VAC Power Only.
1 Amp Maximum Load.
Local Loop
RS-485
9600 Baud
R - 24VAC
G - Fan ON/OFF Only
All Comm Loop Wiring Is
Straight Thru
T to T, R to R & SHLD to SHLD
Relay Output Contacts
R2 Through R5 May Be User-Configured
For The Following:
1 - Heating Stages
2 - See Note 1 Below
3 - Warm-up Mode Command (VAV Boxes)
4 - Reversing Valve (Air To Air Heat Pumps)
5 - Reheat Control (Dehumidification)
6 - Exhaust Fan Interlock
7 - Preheater For Low Ambient Protection
8 - Alarm
9 - Override
10 - Occupied
11 - OA Damper
12 - Heat Wheel
13 - Emergency Heat
Note: 1.) When Using the HP2C Module,
All Compressors Will Be Wired From the
Protection Module, Not the VCM-X
Controller.
2.) A Total Of 20 Relays Are Available By
Adding Relay Expansion Modules. All
Expansion Module Relay Outputs Are UserConfigurable As Listed Above.
See Individual Component
Wiring Diagrams For
Detailed Wiring Of Analog
Inputs And Outputs
AI1 SET
AI1 SET
AI1
AI5
24 VAC
AI4 SET
AI2 SET
AI7
AI3 SET
AI4
AI2 SET
AI2
AI3
AI5 SET
GND
GND
AI7 SET
AI3 SET
Line Voltage
24VAC
AI4 SET
Size Transformer For
Correct Total Load.
VCM-X Modular Controller
= 8 VA
Connect To
E-BUS
Distribution
Module
Jumpers
AI5 SET
Connect To Digital Room Sensor And/Or
Digital CO2 Sensor
Splice If Required
AI7 SET
OE271
Static Pressure
Transducer
Connect FRP Tubing To High Pressure
Port (Bottom Tube) and Route To Static
Pressure Pickup Probe Located In Unit
Discharge. Leave Port Marked “Lo” Open
To Atmosphere
Line Voltage
Connect To E-BUS Distribution Module
or Expansion Module(s) (When Used)
Warning:
24 VAC Must Be Connected So That All Ground
Wires Remain Common. Failure To Do So Will
Result In Damage To The Controllers.
Figure 6: VCM-X Modular Controller Connection to Full Digital Module
14
Technical Guide
Full Digital Module
Appendix
NOTE: Contact Factory for the correct HSSC cable length for
your application. Cables are available in ½ and 3 meter
lengths and 100 and 150 foot lengths.
WARNING:
Be sure all controllers and modules are
powered down before connecting or
disconnecting HSSC cables.
OE370-23-FD-A
Full Digital Module
OE365-23-EBD E-BUS
Distribution Module
YS102308
REV 1
I2C TO COMM
DIST. BOARD
+5V
R1
SIG 1
OUTPUT
R2
GND
R3
+COMM
+5V
R4
SIG 2
Rc
SHLD
-COMM
RELAYS
GND
GND
+VDC
ANALOG
+5V
AO1
SIG 3
AO2
GND
GND
INPUT
+5V
+COMM
SHLD
SIG 4
PWM1-
-COMM
GND
PWM1+
BIN 1
PWM2-
GND
PWM2+
BIN 2
COM
OPTIONS
24VAC
ADDRESS
GND
If Using One
Module, Set
Addresses To
Off. If Using
Two Modules,
Set Addresses
Consecutively.
ALARM
STAT
COMM
PWR
GND
WARNING!!
Observe Polarity! All
boards must be wired with
GND-to-GND and 24 VACto-24 VAC. Failure to
observe polarity could
result in damage to the
boards.
485 DRV
24 VAC
PWR
This Dip
Switch Is Not
Used For This
Application
WARNING!!
Observe Polarity! All boards must
be wired with GND-to-GND and 24
VAC-to-24 VAC. Failure to observe
polarity could result in damage to
the boards.
Line Voltage
Modular Cable
Connect To
VCM-X Modular Controller
24 VAC Transformer
3 VA Minimum
HSSC Cable
Connect To E-BUS
Distribution Module
HSSC Cable
Connect To Other
WattMaster-Approved
E-BUS Expansion Module(s)
Figure 6: VCM-X Modular Controller Connection to Full Digital Module
Technical Guide
15
www.aaon.com
2425 So. Yukon Ave • Tulsa, OK 74107-2728
Ph: (918) 583-2266 • Fax: (918) 583-6094
AAON® Manual Part No. R84500
WattMaster Manual Form No: AA-FDM-TGD-01G
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