FILE NO. SVM-04032
– 67 –
<Inspection procedure>
-Cooling and heating model-
Turn on power supply.
Refer to item “Power
can not be turned on”.
Does OPERATION
lamp blink?
Is it possible to start
unit by remote control?
Is it possible to detect
DC 15 – 60V between
2
and
3
on terminal block?
Is crossover
cable normal?
Is it possible to detect
AC 12V on secondary side
(CN06) of transformer?
Is it possible to detect
DC 5V at Q60 and
12V at Q50?
All lamps on
indoor unit normal?
Are TD and TE sensors
normal?
(TD=17.9k
Ω
at 50°C)
(TE=10k
Ω
at 25°C)
Is it possible to detect
AC 220 – 240V at CN11?
Does MG switch operate?
Refer to 9-9
“Troubleshooting for
Remote Control”.
Check TA and
TC sensors or refer to
“01 – 04” in Table 9-4-1.
Connect crossover
cable properly.
Refer to 9-8-3 “How to
check outdoor P.C. board.”
Replace MG switch.
YES
NO
(Next Page)
Replace outdoor
P.C. board.
Replace sensors.
Replace outdoor
P.C. board.
Replace outdoor
transformer.
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO