Compressor and outdoor fan do not operate (Only indoor fan operates)
Press EMERGENCY ON/OFF bunon
3 min
.
time-delay function operates.
Test mode operates for 30 min.
MS12/15EN
Is there 230V AC between
-
a
on
outdoor terminal block
?
No
L
Tum on outdoor
MSOSEW power supply.
Is there
1
15V AC between
-
m.
Yes
Check voltage to contactor 52C
Yes
Is there 1 2V DC between
(
+
'
-
2
-
1
of
c
Check Contactor 52C
outdoor term~nal block TB2
7
If defectwe replace.
*
No
is there 12V DC between.li(+)
-
211-1
of
Yes
Check
cont~nu~ty
of
Indoor term~nal block TB2
?
L
~ndoor and outdoor untt
control wiring.
J
Replace the power P. C. board.
Check resistance of room temp. thermistor RT1 1.
NO
e
Replace Room temp.
See the thermistor resistance on page
37.
thermistor RT11.
i
Yes
Is there 12V DC between CN 1020-
-
@
+
NO
on the Indoor electronic control P.C. board
?
*
Replace the indoor electronic
control P.C. board
Yes
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