20
Troubleshooting (cont’d)
ΙΙΙ
5. When there is no warm air in the current mode
5. When there is no warm air in the current mode
1) Checklist :
(1) Is the set temperature of the remote control lower than room temperature in the Heat mode?
(2) Is the Indoor PCB properly connected with the CN71 connector?
2) Troubleshooting procedure
After training on, the Heating starts
in five minutes.
Is #9 of Micom (IC04) DC 5.0 V?
Is the number checking #12 of IC06 (
ULN2003A
) LOW?
Is voltage rating between CN71 #3 and
CN71 #5 within
±
10% range?
4 way valve of the outdoor unit or connection
cable is abnormal.
Replace 4 way valve check connection cable
NO
YES
YES
YES
NO
NO
NO
YES
Normal
Micom is abnormal.
IC 06 is abnormal.
RY 73 is abnormal.
Replace PCB
AQ09A5(6)MA SM_E_15777 1/12/04 5:02 PM Page 20
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