Electra WNG 50 DCI Service Manual page 85

13.3.4 Outdoor unit diagnosis and corrective actions
NO Fault
1 Sensors failures of all
types
2
IPM Fault
3
Bad EEPROM
4
DC under/over Voltage
5
AC under Voltage
6
Indoor / Outdoor unit
Communication mismatch
7
No Communication
8
Compressor Lock
9
Bad Communication
Judgment by MegaTool
13.4
MegaTool is a special tool to monitor the system states.
Using MegaTool requires:
x
A computer with RS232C port.
x
A connection wire for MegaTool.
x
A special MegaTool software.
Use MegaTool according to following procedure:
x
Setup MegaTool software: copy the software to the computer.
x
Connect RS232C port in computer with MegaTool port in
Indoor/Outdoor unit controller by the connection wire.
x
Run the software and choose the COM port, you can monitor the
A/C system state in monitor tab.
Simple procedures for checking the Main Parts
13.5
Checking Mains Voltage
13.5.1
Confirm that the Mains voltage is between 198 and 264 VAC. If Mains
voltage is out of this range, abnormal operation of the system is expected. If
in range check the Power (Circuit) Breaker and look for broken or loosed
cable lugs or wiring mistake(s).
Service Manual - WNG 50_60_80 DCI
Probable Cause
Electronics HW
problem
Electronics HW
problem
Indoor and Outdoor
controllers are with
different versions
Communication or
grounding wiring is not
good.
Communication quality is
low reliability
.
Revision Y05-02
CONTENT
TROUBLESHOOTING
Corrective Action
Check sensors connections
or replace sensors.
Check all wiring and jumper
settings, if OK, replace
electronics.
No action, unless special
parameters are required for
unit operation.
Check outdoor unit power
supply voltage
Check outdoor unit power
supply voltage
Replace Indoor controller
Check Indoor to Outdoor
wiring and grounding
Switch unit to STBY and
restart
Check Indoor to Outdoor
wiring and grounding
13-5