Troubleshooting - Electra LEX 25 DCI Service Manual

13.

TROUBLESHOOTING

13.1 Troubleshooting for DCI 25 / 35 / 50 / 60 / 72Z
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!!!
13.1.1 Single Split System failures and Corrective Actions
No Symptom
Power supply indicator
1 (Red LED) does not light
up.
Unit does not respond to
2
remote control message
Unit responds to remote
control message but
3
Operate indicator (Green
LED) does not light up
Indoor fan does not start
4 (louvers are opened and
Green LED does light up)
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
SM LEXDCI 1-E.1 GB
WARNING!!!
VOLTAGE!!!
It takes about 3 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
Problem with outdoor
electronics or outdoor fan
CONTENTS
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 and follow
the actions described.
Perform diagnostics and follow
the actions described.
Check outdoor fan motor
according to the procedure below,
if not OK replace controller.
13-1