Electra ONG 25 DCI INV, Service Manual

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TROUBLESHOOTING
12-6 Revision 0 Service Manual – WNG DCI
12.3.4 Outdoor unit diagnosis and corrective actions
o.
Fault
Probable Cause Corrective Action
Sensors failures of all
types Check sensors
connections or replace
sensors.
IPM Fault Electronics HW
problem Check all wiring and
umper settings, if OK,
replace electronics.
Bad EEPROM No action, unless special
parameters are required
for unit operation.
DC under/over Voltage Electronics HW
problem Check outdoor unit power
supply voltage
AC under Voltage Check outdoor unit power
supply voltage
Indoor / Outdoor unit
Communication
mismatch Indoor and Outdoor
controllers are with
different versions Replace Indoor controller
No Communication Communication or
grounding wiring is not
good. Check Indoor to Outdoor
wiring and grounding
Compressor Lock Switch unit to STBY and
restart
Bad Communication Communication quality is
low reliability Check Indoor to Outdoor
wiring and grounding
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