Toshiba RAS-18UFHP-E Service Manual page 62

<Inspection procedure>
-Cooling and heating model-
Turn on power supply.
Does OPERATION
lamp blink?
YES
Is it possible to start
unit by remote control?
YES
Is it possible to detect
DC 15 – 60V between 2
and 3 on terminal block?
YES
Is crossover
cable normal?
YES
Is it possible to detect
AC 12V on secondary side
(CN06) of transformer?
YES
Is it possible to detect
DC 5V at Q60 and
12V at Q50?
YES
All lamps on
indoor unit normal?
YES
Are TD and TE sensors
normal?
(TD=17.9kΩ at 50°C)
(TE=10kΩ at 25°C)
YES
Is it possible to detect
AC 220 – 240V at CN11?
YES
Does MG switch operate?
(Next Page)
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
– 61 –
FILE NO. SVM-02008
Refer to item "Power
can not be turned on".
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.
Replace outdoor
transformer.
Replace outdoor
P.C. board.
Refer to 9-8-3 "How to
check outdoor P.C. board."
Replace sensors.
Replace outdoor
P.C. board.
Replace MG switch.