Airwell CKD 036, Service Manual

Page: 77 / 122

13-2
TROUBLESHOOTING
SM CKDDCI 2-A.3 GB
13.2 General System Failures and Corrective Actions
No.
SYMPTOM /
PROBLEM
PROBABLE
CAUSE
CORRECTIVE ACTION
Indoor unit
1.
Indoor unit power
supply indicator (Red
LED) does not light
up.
No Power
supply Check supply voltage to main terminals L and N
with volt meter.
No supply from
outdoor Check fuse at the connection wiring on outdoor
unit terminals (see Electrical Scheme 9.4)
Miss-wiring
Check all supply wiring to controller and
terminals according to wiring diagram
Loose
connection
Check all power wiring connections
Display and
display cable Check continuity of each wire of the display
wires/pins with Ohm meter
If still not OK Check if fuse burnt
2
Fuse burned in
indoor unit controller
Short Circuit
between wires Check for any cuts or exposed supply wires or
miss-wiring
Failure of Indoor
Unit Fan Motor Check the motor and capacitor (
13.5.19
)
Check for any cuts or exposed wires
If still not OK Replace fuse
3
Indoor unit does not
respond to remote
control message
Remote control
message not
reached the
indoor unit
Check remote control batteries
Check continuity of each wire of the display
wires/pins with Ohm meter
If still not OK
Replace display box or indoor Electronic
Assembly (
14.2.2, 14.2.3
)
4
Indoor unit responds
to remote control
message but Operate
indicator (Green
LED) does not light
up
Problem with
display PCB
Replace display PCB (
14.2.3
).
If still not OK Replace indoor Electronic Assembly (
14.2.2
)
5
Indoor fan does not
start (louvers are
opened and Green
LED is ON)
Unit in heat
mode and coil is
still not warm
Change to Cool or Fan mode
Failure of Indoor
Unit Fan Motor Check the motor and capacitor (
13.5.19
)
Check for any cuts or exposed wires
Problem with
controller or
motor capacitor
Change to high speed and Check power supply
to motor is higher than 220VAC
If still not OK Replace indoor Electronic Assembly (
14.2.2
)
6
Indoor fan works
when unit is OFF,
and indoor fan speed
is not changed
by remote control
command.
Controller
problem
Replace indoor Electronic Assembly (
14.2.2)