Axpert VM-1000 Service Manual

专案名称：
Axpert VM 1KW/ VM 2KW
专案编号： S1701112
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维修手册
Prepared by：
郭佳威
Date：
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Date：
Approved by：
Date：
V-RDP-004-73 A
2018‐3‐19
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专案名称： Axpert VM 1KW/ VM 2KW
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专案名称： Axpert VM 1KW/ VM 2KW
专案编号： S1701112
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Axpert VM-1000/ VM-2000
Charger/ Inverter
Service manual
V-RDP-004-73 A
3 / 30
维修手册
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Table of contents
1.
GENERAL INFORMATION ........................................................................................................................... 5
1.1
1.2
GETTING START ........................................................................................................................................... 5
IMPORTANT SAFETY INSTRUCTIONS ............................................................................................................ 5
2.
FUNCTIONAL BLOCK ................................................................................................................................... 7
3.
WORKING PRINCIPLE OF THE MAJOR FUNCTIONAL BLOCK........................................................ 8
3.1
3.2
3.3
3.4
4.
FUNCTIONAL EXPLANATIONS FOR EACH PCB ................................................................................. 12
4.1
4.2
4.3
4.4
5.
MAIN BOARD .............................................................................................................................................. 12
SCC BOARD .............................................................................................................................................. 12
COMM BOARD .......................................................................................................................................... 12
LED BOARD ............................................................................................................................................... 13
INTERFACE .................................................................................................................................................... 13
5.1
5.2
6.
SWITCH POWER SUPPLY ............................................................................................................................ 8
DC TO DC CONVERTER (PUSH-PULL) ........................................................................................................ 9
DC TO AC INVERTER (FULL-BRIDGE) ....................................................................................................... 10
CHARGER .................................................................................................................................................. 11
LED INDICATOR ......................................................................................................................................... 13
LCD DISPLAY ICONS ................................................................................................................................. 14
TROUBLESHOOTING .................................................................................................................................. 18
6.1
6.2
6.3
6.4
FAULT REFERENCE CODE ......................................................................................................................... 18
WARNING INDICATOR ................................................................................................................................ 18
TROUBLE SHOOTING ACCORDING TO FAULT INDICATION .......................................................................... 19
QUICK START ............................................................................................................................................. 20
7.
TEST STEP ...................................................................................................................................................... 22
8.
ELECTRICAL SPECIFICATION................................................................................................................. 23
8.1
8.2
8.3
9.
TABLE 1 LINE MODE SPECIFICATIONS ...................................................................................................... 23
TABLE 2 INVERT MODE SPECIFICATIONS.................................................................................................. 23
TABLE 3 CHARGE MODE SPECIFICATIONS ............................................................................................... 25
ASSEMBLING GUIDE................................................................................................................................... 26
9.1
9.2
THE VM 1K ASSEMBLY .............................................................................................................................. 26
THE VM 2K ASSEMBLY .............................................................................................................................. 29
V-RDP-004-73 A
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1. General information
1.1 Getting start
This manual is for Axpert VM-1000/VM-2000 series, it can help service personal perform the basic
maintenance and repair service.
This manual focus on the service, so you should get the basic operation of the Inverter/Charger from the
user manual, and make sure you had read and understood user manual before you use this service
manual.
The manual include 8 sections, as follows

General Information, this section shows you the general information of the service manual

Functional Block, this section shows you the major functional block of the Inverter/Charger

Working Principle of the major Functional Block, this section shows you the major functional block

Function explanations for each PCB, this section shows you all the PCBs of the Inverter/Charger

Interface, this section shows you the LCD interface, include display and setting

Trouble shooting, this section will give you the way to find the trouble

Test step ,this section tells you how to test the Inverter/Charger after you repair the unit

Electric Specifications, this section shows you the basic electric specification of the Inverter/Charger
1.2 Important safety instructions
WARNING: This chapter contains important safety and operating instructions. Read and
keep this manual for future reference.
1.
Before using the unit, read all instructions and cautionary markings on the unit, the batteries and
all appropriate sections of this manual.
2.
CAUTION --To reduce risk of injury, charge only deep-cycle lead acid type rechargeable batteries.
Other types of batteries may burst, causing personal injury and damage.
Do not disassemble the unit. Take it to a qualified service center when service or repair is required.
Incorrect re-assembly may result in a risk of electric shock or fire.
To reduce risk of electric shock, disconnect all wirings before attempting any maintenance or
cleaning. Turning off the unit will not reduce this risk.
3.
4.
5.
6.
7.
CAUTION – Only qualified personnel can install this device with battery.
NEVER charge a frozen battery.
For optimum operation of this inverter/charger, please follow required spec to select appropriate
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cable size. It’s very important to correctly operate this inverter/charger.
8. Be very cautious when working with metal tools on or around batteries. A potential risk exists to
drop a tool to spark or short circuit batteries or other electrical parts and could cause an
explosion.
9. Please strictly follow installation procedure when you want to disconnect AC or DC terminals.
Please refer to INSTALLATION section of this manual for the details.
10. One piece of fuse(150A, 32VDC) are provided as over-current protection for the battery supply.
11. GROUNDING INSTRUCTIONS -This inverter/charger should be connected to a permanent
grounded wiring system. Be sure to comply with local requirements and regulation to install this
inverter.
12. NEVER cause AC output and DC input short circuited. Do NOT connect to the mains when DC
input short circuits.
13. Warning!! Only qualified service persons are able to service this device. If errors still persist after
following troubleshooting table, please send this inverter/charger back to local dealer or service
center for maintenance.
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2. Functional block
Axpert VM-2000/VM-1000 series production employ a double conversion topology, comprise following
functional blocks, as shown in figure 2.1
Figure 2.1 function block diagram
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3. Working principle of the major functional block
3.1 Switch Power Supply
The switch power supply (SPS) supplies DC power for Inverter/Charger operation. The input voltage of
the SPS is the battery or AC Charger output voltage.
Figure 3.1 basic circuit of power supply
This is the fly-back DC-DC converter, fly-back operation can be easily recognized from the position of the
dots on the transformer primary and secondary(these dots show starts of the winds). When Q1 is ON, the
dot ends of all winds are negative with respect to their no-dot ends. Output rectifier diodes D1, D2, D34
and D38 are reverse-biased and all the output load currents are supplied from storage filter capacitors
CE6, CE7,CE8 and CE9.The primary coil of the transformer acts as an inductor and stored energy.
When Q1 is OFF, the stored energy in the primary coil is delivered to secondary filter capacitors CE6,
CE7,CE8 and CE9.
As shown in figure 3.1, this circuit may generate several output voltage, such as +12V,-12V, +VCC, +5V,
HFPW+, GTDRV3.
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3.2 DC to DC Converter (push-pull)
The push-pull topology is a transformer isolated forward-mode regulator. Unlike the
Fly-back transformer, the push-pull transformer does not store any energy and output current is drawn
when either power switches (Q9-Q11 or Q2-Q4) is conducting.（Q22 and Q5 NC）
A push-pull topology is shown in figure 3.2, power switch Q9-Q11 and Q2-Q4 receive 180 out-of-phases.
Refer to figure 3.2, the battery voltage is transformed through a push-pull DC-DC converter to >330Vdc
as DC BUS for inverter. When the line fails, the DC BUS voltage is caught up to supply the power needed
by the inverter immediately.
The output voltage (DC BUS) must be higher than the input voltage (BAT+) .It mentioned by the primary
turns and secondary turns. In this circuit, BAT= + 12V or BAT=+24V,DC BUS voltage above 330Vdc.
Figure 3.2 Push-pull topology
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3.3 DC to AC Inverter (full-bridge)
The Inverter circuit (Figure 3.3) and PWM control are only active under battery mode. The Inverter circuit
of Axpert series is based on a full-bridge circuitry and its output is driven by photo-couplers. The
photo-couplers are capable to drive high energy and high speed power of MOSFET and IGBT with
independent high and low referenced output channels.
To construct a high frequency PWM inverter, the drivers receive switching signals from PWM generation
circuit through a pair of photo-couplers to trigger the upper IGBT and the lower IGBT alternately. The
output of IGBT is filtered by an LC circuit to reduce the O/P voltage harmonics distortion.
Figure 3.3 Full-bridge topology
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3.4 Charger
The Charger of utility is to recharge and maintain the batteries at fully charged condition .The charger
charges the batteries with a constant current at initial stage, and as battery voltage keep increasing, the
charge current decrease accordingly until the charge voltage reached the constant voltage level, and
then the charger turn to the floating charge mode.
As shown in figure 3.4, the charger also employed a fly-back topology like the SPS.
Figure 3.4 Charger fly-back topology
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4. Functional explanations for each PCB
Item
Model
1
VM-2000
PCBA number
QTY
Main
71-501052-XXG
1
2
CNTL
71-501090-XXG
1
3
MPPT CNTL&PANEL
71-501054-XXG
1
4
MPPT Choke
71-501084-XXG
1
5
COMM
71-500900-XXG
1
Main
71-501051-XXG
1
6
CNTL
71-501090-XXG
1
7
MPPT CNTL&PANEL
71-501054-XXG
1
8
MPPT Choke
71-501085-XXG
1
COMM
71-500900-XXG
1
5
VM-1000
PCB type
Remark
Same with VM-2000
Note: “XX” in the sheet of PCBA number is the version of semi-finished PCBA.
4.1 Main board
The main board consists of SPS, DC-DC converter, inverter, charger, MCU control. Many semiconductors
and easy-failure components on the board, so it should be pay more attention when the system is
abnormal.
4.2 SCC board
The solar current control (SCC) board based on a MPPT control mode for VM-2000 and VM-1000 .When
the solar source is presented, battery charged from solar source; MAX charge current is 40A@ VM-2000
and VM-1000, if solar panel with enough energy.
4.3 COMM board
This inverter/charger is equipped with a communication port to communicate with a PC with corre
sponding software. Please use supplied communication cable to connect to communication port of
this inverter and USB port of the PC.
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4.4 LED board
The LED display panel includes there indicators and four functional keys.
5. Interface
The operation and display panel, shown in below chart, It is on the front panel of the inverter. It includes
three indicators, four function keys and a LCD display, indicating the operating status and input/output
power information.
5.1 LED Indicator
LED Indicator
Green
Green
Red
Messages
Solid On
Output is powered by utility in Line mode.
Flashing
Output is powered by battery or PV in battery mode.
Solid On
Battery is fully charged.
Flashing
Battery is charging.
Solid On
Fault occurs in the inverter.
Flashing
Warning condition occurs in the inverter.
Function Keys
Function Key
V-RDP-004-73 A
Description
ESC
To exit setting mode
SCROLL
To go to next selection
ENTER
To confirm the selection in setting mode or enter setting mode
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5.2 LCD Display Icons
Icon
Function description
Input Source Information
Indicates the AC input.
Indicates the PV input
Indicate input voltage, input frequency, PV voltage, battery voltage.
Configuration Program and Fault Information
Indicates the setting programs.
Indicates the warning and fault codes.
Warning:
Fault:
flashing with warning code.
lighting with fault code
Output Information
Indicate output voltage, output frequency, load percent, load in VA, load in
Watt
Battery Information
Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% in battery
mode and charging status in line mode.
In AC mode, it will present battery charging status.
Status
Constant
V-RDP-004-73 A
Battery voltage
<2V/cell
2 ~ 2.083V/cell
LCD Display
4 bars will flash in turns.
Bottom bar will be on and the other three
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bars will flash in turns.
Bottom two bars will be on and the other
two bars will flash in turns.
Bottom three bars will be on and the top
Current mode /
Constant
00
2.083 ~ 2.167V/cell
Voltage mode
> 2.167 V/cell
bar will flash.
Floating mode. Batteries are fully charged.
4 bars will be on.
In battery mode, it will present battery capacity.
Load Percentage
Battery Voltage
LCD Display
< 1.85V/cell
1.85V/cell ~ 1.933V/cell
Load >50%
1.933V/cell ~ 2.017V/cell
> 2.017V/cell
< 1.892V/cell
1.892V/cell ~ 1.975V/cell
Load < 50%
1.975V/cell ~ 2.058V/cell
> 2.058V/cell
Load Information
Indicates overload.
Indicates the load level by 0-24%, 25-50%, 50-74% and 75-100%.
0%~25%
25%~50%
50%~75%
Mode Operation Information
Indicates unit connects to the mains.
Indicates unit connects to the PV panel.
Indicates load is supplied by utility power.
Indicates the utility charger circuit is working.
Indicates the DC/AC inverter circuit is working.
V-RDP-004-73 A
75%~100%
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Mute Operation
Indicates unit alarm is disabled.
Icon
Function description
Input Source Information
Indicates the AC input.
Indicates the PV input
Indicate input voltage, input frequency, PV voltage, battery voltage
Configuration Program and Fault Information
Indicates the setting programs.
Indicates the warning and fault codes.
flashing with warning code.
Warning:
Fault:
lighting with fault code
Output Information
Indicate output voltage, output frequency, load percent, load in VA and
load in Watt.
Battery Information
Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% in battery
mode and charging status in line mode.
In AC mode, it will present battery charging status.
Status
Battery voltage
<2V/cell
Constant
Current mode
/ Constant
Voltage mode
2 ~ 2.083V/cell
2.083 ~ 2.167V/cell
> 2.167 V/cell
Floating mode. Batteries are fully charged.
V-RDP-004-73 A
LCD Display
4 bars will flash in turns.
Bottom bar will be on and the other three
bars will flash in turns.
Bottom two bars will be on and the other
two bars will flash in turns.
Bottom three bars will be on and the top
bar will flash.
4 bars will be on.
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In battery mode, it will present battery capacity.
Load Percentage
Battery Voltage
LCD Display
< 1.85V/cell
1.85V/cell ~ 1.933V/cell
Load >50%
1.933V/cell ~ 2.017V/cell
> 2.017V/cell
< 1.892V/cell
1.892V/cell ~ 1.975V/cell
Load < 50%
1.975V/cell ~ 2.058V/cell
> 2.058V/cell
Load Information
Indicates overload.
Indicates the load level by 0-24%, 25-50%, 50-74% and 75-100%.
0%~25%
25%~50%
50%~75%
Mode Operation Information
Indicates unit connects to the mains.
Indicates unit connects to the PV panel.
Indicates load is supplied by utility power.
Indicates the utility charger circuit is working.
Indicates the DC/AC inverter circuit is working.
Mute Operation
Indicates unit alarm is disabled.
V-RDP-004-73 A
75%~100%
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6. Troubleshooting
This section describes how to find the trouble when the system is abnormal. We suggest you can follow
the service procedure:
a. Check the system status by LED and LCD display, the sounds of buzzer.
b. Observe the failure board, static checking.
c. Replace the failure components.
d. Static checking.
e. Power up checking.
f. Test after repair.
Following section will help service person to solve most of problem.
6.1 Fault Reference Code
Fault Code
Fault Event
01
Fan is locked when inverter is off.
02
Over temperature
03
Battery voltage is too high
04
Battery voltage is too low
05
06
Icon on
Output short circuited or over temperature is detected by
internal converter components.
Output voltage is abnormal. (For 3KVA model)
Output voltage is too high. (For 3KVA Plus/5KVA model)
07
Overload time out
08
Bus voltage is too high
09
Bus soft start failed
6.2 Warning Indicator
Warning
Code
Warning Event
Audible Alarm
01
Fan is locked when
inverter is on.
Beep three times every
second
03
Battery is over-charged
Beep once every second
V-RDP-004-73 A
Icon flashing
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Low battery
Beep once every second
07
Overload
Beep once every 0.5 second
10
Output power derating
Beep twice every 3 seconds
Battery equalization
None
19 / 30
6.3 Trouble shooting according to fault indication
Problem
LCD/LED/Buzzer
Explanation / Possible cause
Unit shuts down
automatically
during startup
process.
LCD/LEDs and buzzer
will be active for 3
seconds and then
complete off.
The battery voltage is too low
(<1.91V/Cell)
1. Re-charge battery.
2. Replace battery.
No indication.
1. The battery voltage is far too
low. (<1.4V/Cell)
2. Internal fuse tripped.
1. Contact repair center
for replacing the fuse.
2. Re-charge battery.
3. Replace battery.
Input voltage is
displayed as 0 on the
LCD and green LED is
flashing.
Input protector is tripped
Check if AC breaker is
tripped and AC wiring is
connected well.
No response after
power on.
Mains exist but the
unit works in
battery mode.
When the unit is
turned on, internal
relay is switched on
and off repeatedly.
Buzzer beeps
continuously and
red LED is on.
Green LED is flashing.
Insufficient quality of AC power.
(Shore or Generator)
Green LED is flashing.
Set “Solar First” as the priority of
output source.
LCD display and LEDs
are flashing
Battery is disconnected.
Fault code 07
Overload error. The inverter is
overload 110% and time is up.
Output short circuited.
Fault code 05
Fault code 02
V-RDP-004-73 A
Temperature of internal converter
component is over 120°C. (Only
available for 1-3KVA models)
Internal temperature of inverter
component is over 100°C.
What to do
1. Check if AC wires are
too thin and/or too long.
2. Check if generator (if
applied) is working well
or if input voltage range
setting is correct.
(UPSAppliance)
Change output source
priority to Utility first.
Check if battery wires
are connected well.
Reduce the connected
load by switching off
some equipment.
Check if wiring is
connected well and
remove abnormal load.
Check whether the air
flow of the unit is
blocked or whether the
ambient temperature is
too high.
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Battery is over-charged.
Return to repair center.
The battery voltage is too high.
Check if spec and
quantity of batteries are
meet requirements.
Fault code 01
Fan fault
Replace the fan.
Fault code 06/58
Output abnormal (Inverter voltage
below than 190Vac or is higher
than 260Vac)
1. Reduce the connected
load.
2. Return to repair
center
Fault code
08/09/53/57
Internal components failed.
Return to repair center.
Fault code 51
Over current or surge.
Fault code 52
Bus voltage is too low.
Fault code 55
Output voltage is unbalanced.
Restart the unit, if the
error happens again,
please return to repair
center.
Fault code 56
Battery is not connected well or
fuse is burnt.
Fault code 03
If the battery is
connected well, please
return to repair center.
6.4 Quick start
Before any detail check of the system, please check the components listed as follow table.
NOTE: It is important to check the capacitor’s voltage on the board lower than the safety voltage before
any check action.
Functional
block
Checked components
Fuse
MOSFET：
CSD19505KCS VM-2000
DC-DC
Converter
IRFB3306GPBF VM-1000
Diode: RHRP1560 VM-2000
BYC8-600P VM-1000
Resistance
F1
Q2---Q4
Q9---Q11
D17---D20
R6-R9，R13-R15
R21
Instruction
function
Reference
value
Failed status
Resistance
0.14 ohm
short or open
310k
DS
short or open
290k GD
short or open
5k
short or open
Resistance
Resistance
Resistance
IGBT:
DC-AC
Inverter
STGW60H65DFB VM-2000
Q16---Q19
Resistance
STGW30H60DFB VM-1000
Resistance
V-RDP-004-73 A
GS
165k
short or open
10 ohm
short or open
178K-200K DS
short or open
220K-250K
GD
50K
R54,R56,R61,R64
Resistance
33 ohm
short or open
GS
short or open
short or open
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00
U24---U27
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Resistance
2K
short or open
0.5M
PIN1-PIN2
Rectifier:
GBU8M 8A VM-2000
REC1
Resistance
GBU6M 6A VM-1000
2SK3878 VM-2000
Q20，Q21
Resistance
2SK3878 VM-1000
D22---D23
STPS20H100CT VM-1000
S.P.S
Resistance
Control IC
UC3843
Resistance
Resistance
R258 ,R262
Resistance
Control IC
UC3845
Resistance
D2,D34,D38
Diode
Resistance
MOSFET：IRFB4410Z
162K
DS
short or open
210K
GD
short or open
12K
GS
short or open
short or open
78K
A->K
short or open
>4K
PIN5-PIN7
short or open
100 ohm
short or open
>4K
short or open
Resistance
>4K
short or open
D1
Resistance
3.5K
short or open
R90
Resistance
20 ohm
short or open
Q47,Q45，Q32
Resistance
>230K
DS
short or open
0.7M
GD
short or open
0.45M
GS
short or open
Op07 Amp
U7 PIN8-PIN4
Resistance
>30K
short or open
MCU
PIN17-PIN16
Resistance
>0.8K
short or open
4.92K
short or open
(P-N)
short or open
Diode:
HTR30L200CT
VM-1000& VM-2000
V-RDP-004-73 A
short or open
PIN5-PIN7
VM-1000& VM-2000
S.C.C
short or open
PIN1-PIN4
Resistance
Diode :
MBR20200CTG VM-2000
0.43M
PIN1-PIN3
160K
MOSFET:
Charger
short or open
D54,D57
Resistance
short or open
维修手册
专案名称： Axpert VM 1KW/ VM 2KW
专案编号： S1701112
7. Test Step
V-RDP-004-73 A
修订版次：
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维修手册
专案名称： Axpert VM 1KW/ VM 2KW
专案编号： S1701112
修订版次：
00
PAGE
23 / 30
8. Electrical specification
8.1
Table 1 Line Mode Specifications
Line Mode (Utility Bypass Mode)
Input Voltage Waveform
Nominal Input Voltage
Low Loss Voltage
Low Loss Return Voltage
High Loss Voltage
High Loss Return Voltage
Max AC Input Voltage
Nominal Input Frequency
Low Loss Frequency
Low Loss Return Frequency
High Loss Frequency
High Loss Return Frequency
Output Short Circuit Protection
Efficiency
Transfer Time
Sinusoidal (utility or generator)
230Vac
170Vac±7V(UPS); 90Vac±7V(Appliances)
180Vac±7V(UPS); 100Vac±7V (Appliances)
280Vac±7V
270Vac±7V
300Vac
50Hz / 60Hz (Auto detection, 55Hz as boundary)
40±1Hz
42±1Hz
65±1Hz
63±1Hz
Circuit Breaker
>95% (Rated R load, battery full charged)
10ms typical, 12ms maximum @50Hz (UPS);
20ms typical, 25ms maximum @50Hz (Appliances)
Power Limitation
8.2
Table 2 Invert Mode Specifications
Inverter Mode
Axpert Model
Rated Output Power
Output Voltage Waveform
V-RDP-004-73 A
VM-2000
VM-1000
2KVA/2KW
1KVA/1KW
Pure Sine Wave
维修手册
专案名称： Axpert VM 1KW/ VM 2KW
专案编号： S1701112
修订版次：
Output Voltage Regulation
Output Frequency
Peak Efficiency
Overload Protection
Surge Capacity
Nominal DC Voltage
Cold Start Voltage
Low DC Warning Voltage
@ load < 50%
@ load ≥ 50%
Low DC Warning Recovery Voltage
@ load < 50%
@ load ≥ 50%
Low DC Cut-off Voltage
@ load < 50%
@ load ≥ 50%
High DC Recovery Voltage
High DC Cut-off Voltage
DC Voltage Accuracy
THDV
DC Offset
No Load Power Consumption
V-RDP-004-73 A
00
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230Vac±5%
50Hz
93%
5s@≥130% load; 10s@105%~130% load
2 * rated power for 5sec
24Vdc
12 Vdc
23.0Vdc
11.5Vdc
23.0Vdc
22.0Vdc
11.5Vdc
11Vdc
23.5Vdc
23.0Vdc
11.7Vdc
11.5Vdc
21.5Vdc
21.0Vdc
30Vdc
31Vdc
10.7Vdc
10.5Vdc
15Vdc
16Vdc
+/-0.3%V@ no load
<5% for linear load,<10% for non-linear load @
nominal voltage
≦100mV
<35W
<25W
维修手册
专案名称： Axpert VM 1KW/ VM 2KW
专案编号： S1701112
8.3
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Table 3 Charge Mode Specifications
Utility Charging Mode
INVERTER MODEL
2KVA
Charging Algorithm
3-Step
AC Charging Current (Max)
Floating Charging Voltage
1KVA
20Amp(@VI/P=230Vac)
27 Vdc
13.5Vdc
2KVA
1KVA
MPPT Solar Charging Mode
INVERTER MODEL
Charging Current
PV Array MPPT Voltage Range
Max. PV Array Open Circuit Voltage
Max Charging Current
(AC charger plus solar charger)
V-RDP-004-73 A
40Amp
15~80Vdc
30~80Vdc
102Vdc
60Amp
维修手册
专案名称： Axpert VM 1KW/ VM 2KW
专案编号： S1701112
修订版次：
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9. Assembling guide
9.1 The VM 1K assembly
Note:
(1) Before take apart inverter, please confirm all power cords are disconnected!
(2) The guide as below is only for reference, for the figures as below may not be exactly the same
with the version in your hand. Please notice the difference and follow your original version.
Remove the screws of
the wiring cover.
Remove the screws of
the top cover.
V-RDP-004-73 A
维修手册
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专案编号： S1701112
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1．Open the top cover.
You can see unit
inside.
2. Remove the plastic
rivet on the air flow
paper to take out the
paper
and
Cut
the
cable tie.
3.
Remove
AC OUT
FAN
AC IN
Comm
board and LCD,LED;
Unplug the ac input,
output plug and fan.
4. Screw down the
screw, then the main
board.
V-RDP-004-73 A
COMM Board
维修手册
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专案编号： S1701112
修订版次：
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LCD and LED are
connected to the
main board
V-RDP-004-73 A
维修手册
专案名称： Axpert VM 1KW/ VM 2KW
专案编号： S1701112
9.2 The VM 2k assembly
Remove the screws of
the wiring cover.
Remove the screws of
the top cover.
V-RDP-004-73 A
修订版次：
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维修手册
专案名称： Axpert VM 1KW/ VM 2KW
专案编号： S1701112
修订版次：
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1．Open the top cover.
You can see unit
COMM Board
inside.
2. Remove the plastic
rivet on the air flow
paper to take out the
paper
and
Cut
AC OUT
the
cable tie.
3.
Remove
Comm
board and LCD,LED;
Unplug the ac input,
output plug and fan.
4. Screw down the
LCD and LED are
FAN
connected to the
screw, then the main
board.
V-RDP-004-73 A
main board
AC IN