– 59 –
TROUBLE-SHOOTING
No operation at all.
*1
*1 Before using the service switch, disengage
and engage the plug. Do not operate the
remote controller.
Check the following parts and replace if faulty
Remove and check the continuity across.
1) Current fuse
2) Varistor
Check whether the appearance is blackish or not.
The resistance must be in
fi
nite. *2
No cooling or heating
Power relay abnormal
YES
Check the continuity between contacts.
3) Power switch
4) Thermal fuse for
therminal board
(96°C) Continuity across
→
If there is no continuity,
also check the fan motor and capacitor.
(102°C) Continuity across
→
If there is no continuity,
check the electric parts and replace if abnormal.
5) Thermal fuse for
Terminal board
*2 Before checking the varistor, detach a terminal.
NO
Operates by setting the service
switch to forced cooling?
Return the service switch to
"Normal".
Set the remote controller to an
operation status and press the ON/
OFF button.
Is the level LO (approx. 0.5V)
between driver IC701 pin
11
power
relay and 0V?
NO
YES
Compressor does not turn at LO.
Replace Power relay
Is voltage normal between Blue and
Red of the CN6? *3
NO
YES
Indoor fan motor or
Q904 abnormal
YES
Is the level LO (approx. 0.5V)
between driver IC 701 pin
13
(Reversing valve relay) and 0V at
heating operation?
NO
Reversing valve
relay abnormal
Replace Reversing
valve relay
Содержание RAC-18GH5
Страница 32: ... 31 MODEL RAC 18GH5 Note 1 200mm or more servicing space is required above the outdoor unit ...
Страница 36: ... 35 CIRCUIT DIAGRAM Remote Control ...
Страница 38: ... 39 BLOCK DIAGRAM MODEL RAS 18GH5 RAC 18GH5 ...
Страница 42: ... 47 REFRIGERATING CYCLE DIAGRAM MODEL RAS 18GH5 RAC 18GH5 ...
Страница 61: ...PM NO 0479E Printed in Malaysia RAS 18GH5 RAC 18GH5 ...