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6
.
T
R
O
U
B
L
E
S
H
6
.
T
R
O
U
B
L
E
S
The room is not cooled at all or not cooled enough
in cooling operation.
The room is not heated at all or not heated enough
in heating operation.
The compressor does not operate.
Push the buttons EMERGENCY
on the indoor unit.
Refer to Trouble Suspension Table
Measure the resistences of room temperature
and indoor pipe temperature thermisters.
Some of the three indicator LEDs are lit.
Measure the secondary voltage of transformer.
Is the measured
value approximately
12.0 V AC?
Replace the control P.C.B. with a new one.
Replace the transformer
with a new one.
O
O
T
I
N
G
H
O
O
T
I
N
G
YES
NO
NO
Is the fuse
breakdown?
Replace the fuse and varister
with a new one.
26
YES
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