Service manual

3 – 11
2 . When one room is not cooled (other rooms are cooled)
Yes
Yes
No
Yes
No
No
No
Yes
No
No
Yes
Yes
S hort circuit of the thermi
stor error
Open circuit of the thermis tor error
Open circuit of s eria l s
ignal line
S hort circuit of seria l s
ignal line
Is the t imer lamp of the indoor unit in the room not cooled flas hing ?
Press the OPERATION button to s ta rt opera ting the air-conditioner. (S et the cooling mode
Is the t imer lamp of the indoor unit in the room not cooled fla s hing ?
Check that the power betwe en the termina l board "N" and "1" of the indoor unit is AC 230V .
R epair the wiring
bet ween the units.
R eplace the indoor
control PW B.
Replace the thermistor.
Check the failure
sympt om with the failure diagnos is mode.
R eplace the outdoor control
PWB
or the expansion valve (UNIT A) or the expansion valve (UNIT B) or the expansion valve (UNIT C) or the expansion valve (UNIT D)
Is the re s is ta nc e va lue of the winding in the fan motor
?
Abnormal fan motor of
indoor unit The fuse is blown.
R eplace the indoor fan moto
r.
Is the wiring between the units connected by mistake or broken ?
R epair the wiring between the units .
Replace the indoorcontrolPWB.
Is the res is ta nce va lue of the the r
-
mis tor for UN IT A (T H6), U NIT B (T H7), UNIT C (T H 8) or UN IT D (T H9)
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