Electra WNG 50 DCI Service Manual page 81

13. TROUBLESHOOTING WNG 50 60 DCI
When Power Up – the whole outdoor unit controller, including the wiring, is
Never open the Outdoor unit before turning off the Power!!!
When turned off, the system is still charged (400V)!!!
It takes about 4 Min. to discharge the system.
Touching the controller before discharging may cause an electrical shock!!!
Single Split system failures and corrective actions
13.1
No SYMPTOM
Power supply indicator
1
(Red LED) does not light
up.
Unit does not respond to
remote control message
2
Unit responds to remote
control message but
3
Operate indicator (Green
LED) does not light up
Indoor fan does not start
(louvers are opened and
Green LED does light up)
4
Indoor fan works when
unit is OFF, and indoor
5 fan speed is not changed
by remote control
command.
Compressor does not
6
start
Compressor stops during
7 operation and Green
LED remains on
Compressor is on but
8
outdoor fan does not
work
Service Manual - WNG 50_60_80 DCI
WARNING!!!
under HIGH VOLTAGE!!!
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.
Problem with PCB or
capacitor
PCB problem
Electronics control
problem or protection
Electronic control or
power supply problem
Problem with outdoor
electronics or outdoor fan
Revision Y05-02
CONTENT
TROUBLESHOOTING
CORRECTIVE ACTION
Check power supply. If power supply
is OK, check display and display
wiring. if OK, replace controller.
Check remote control batteries, if
batteries are 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 and check.
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 replace controller
Replace controller
Perform diagnostics , and follow the
actions described.
Perform diagnostics ,and follow the
actions described.
Check outdoor fan motor according
to the procedure in section, if not OK
replace controller
13-1