Troubleshooting - Electra PXD 25 DCI Service Manual

11.

TROUBLESHOOTING

When Power Up – the whole outdoor unit controller, including the wiring, is under HIGH
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 12.6 below.
.1 Single Split system failures and corrective actions
No SYMPTOM
1 Power supply indicator
(Red LED) does not light
up.
2 Unit does not respond to
remote control message
3 Unit responds to remote
control message but
Operate indicator (Green
LED) does not light up
4 Indoor fan does not start
(louvers are opened and
Green LED does light
up)
5 Indoor fan works when
unit is OFF, and indoor
fan speed is not
changed by remote
control command.
6 Compressor does not
start
7 Compressor stops
during operation and
Green LED remains on
Service Manual - PXD DCI
Warning!!!
VOLTAGE!!!
It takes about 4 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.
Problem with PCB
or capacitor
PCB problem
Electronics control
problem or
protection
Electronic control
or power supply
problem
Revision Y05-01
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 OK replace
controller
Replace controller
Perform diagnostics (See 12.3
below), and follow the actions
described.
Perform diagnostics (See 12.3
below), and follow the actions
described.
11-1