Electra WNG 50 DCI Service Manual page 87

14 TROUBLESHOOTING WNG 80 DCI
When Power Up – the whole outdoor unit controller, including the wiring, is under
Never open the Outdoor unit before turning off the Power!!!
When turned off, the system is still charged (400V)!!!
Touching the controller before discharging may cause an electrical shock!!!
For safe handling of the controller please refer to section 2.5 below.
14.1 General System Failures and Corrective Actions
No SYMPTOM
Indoor unit power supply indicator
1.
(Red LED) does not light up.
Indoor unit does not respond to
2.
remote control message
Indoor unit responds to remote
control message but Operate
3.
indicator (Green LED) does not light
up
Indoor fan does not start (louvers are
4.
opened and Green LED is ON)
Indoor fan works when unit is OFF,
5. and indoor fan speed is not changed
by remote control command.
6. Water leakage from indoor unit
Service Manual - WNG 50_60_80 DCI
WARNING!!!
HIGH VOLTAGE!!!
It takes about 1 Min. to discharge the system.
PROBABLE CAUSE
No power supply
Remote control message
not reached the indoor
unit
Problem with display PCB
Unit in heat mode and coil
is still not warm
Outdoor unit is in opposite
mode
Problem with controller or
capacitor
Controller problem
Indoor unit drainage tube
is blocked
Revision Y05-02
CONTENT
TROUBLESHOOTING
CORRECTIVE ACTION
Check power supply. If OK,
check display and display
wiring. if OK, replace controller
Check remote control
batteries, if OK, check display
and display wiring, if OK,
replace display PCB. If still not
OK replace controller
Replace display PCB.
If still not OK replace controller
Change to cool mode
Change operation mode
Change to high speed and
Check power supply to motor
is higher than 130VAC (for
triack controlled motor) or
higher than 220VAC for fixed
speed motors, if OK replace
capacitor, if not OK replace
controller
Replace controller
Check and open drainage tube
14-1