Troubleshooting - Electra WNG 9 DCI INV Technical Manual

12.

TROUBLESHOOTING

When Power Up – the whole outdoor unit controller, including the wiring, is under
Never open the Outdoor unit before turning off the Power!!!
Touching the controller before discharging may cause an electrical shock!!!
For safe handling of the controller please refer to section 12.5 below.
12.1 General System Failures and Corrective Actions
No SYMPTOM
Indoor unit power supply indicator (Red
1.
LED) does not light up.
Indoor unit does not respond to remote
2.
control message
Indoor unit responds to remote control
message but Operate indicator (Green
3.
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, and
5. indoor fan speed is not changed by
remote control command.
6. Water leakage from indoor unit
One indoor unit or more are operating in
7. cool mode with no capacity, and the other
units have water leaks/freezing problems
One indoor or more are operating in heat
8.
mode with a limited capacity, and the coil
on the other units are very hot.
Outdoor unit display board and leds are
9.
off
10. Compressor operates but one or more
units generates no capacity
HIGH VOLTAGE!!!
When turned off, the system is still charged (400V)!!!
It takes about 1 Min. to discharge the system.
Revision 0
WARNING!!!
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
The communication wires of
the indoor units are switched
No power supply
PFC Chock coil
Burnt fuse
EEV problem
Refrigerant leakage
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
Check and correct the
communication wires connection
Check the connections and the
wiring on the main terminal -
Repair if needed.
Check the PFC Chock coil
(12.4.3)
Check 20A fuse on the Filter
(12.4.2)
Check EEV (12.4.7)
Check refrigeration system (12.2)
12-1