Electra LEX 25 DCI Service Manual page 93

TROUBLESHOOTING
13.2 Troubleshooting for DCI 72 / 80
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!!!
13.2.1 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
4
are opened and Green LED is
ON)
Indoor fan works when unit is
OFF, and indoor fan speed is
5
not changed by remote control
command.
6
Water leakage from indoor unit
13-10
WARNING!!!
HIGH VOLTAGE!!!
When turned off, the system is still charged (400V)!!!
It takes about 1 Min. to discharge the system.
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
CONTENTS
Probable Cause 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
SM LEXDCI 1-E.1 GB