Toshiba RAV-162BH-PE Service Manual page 52

6.4.3 List of Check Codes
ROOM TEMP.
SENSOR (TA).
Out of place, break,
short-circuit.
INDOOR
HEAT-EXCHANGER
SENSOR (TC).
Out of place, break,
short-circuit.
RETURN SIGNAL
NOT COMING TO
INDOOR
1) Wrong wiring in connecting
cable (serial signal).
4-WAY VALVE
SYSTEM
1) Indoor heat-exchanger
temperature rises, after
starting cooling operation.
2) Indoor heat-exchanger
temperature drops after
starting heating operation.
OTHER CYCLE
SYSTEM
1) Indoor heat exchange
temperature does not
change after starting
cooling/heating operation.
2) When transmitting
instruction for stopping
compressor by freeze
preventing control.
DEFROST SENSOR
(TE)
Out of place, break, short-
circuit.
Tel: 01823 665660
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Operation
continuing
Operation
continuing
Operation
continuing
Operation
continuing
Operation
continuing
Outdoor unit stops
(indoor fan L)
Full stop
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1. Check the indoor temp. sensor.
2. Check the indoor PC board.
1. Check the indoor heat-exchanger sensor.
2. Check the indoor PC board.
1. If outdoor unit does not work at all.
(1) Check the connecting cable correct wrong wiring.
(2) Check the outdoor PC board.
2. If operates normally.
Between indoor terminal plates 2 and 3, return signal is:
Available: Check the indoor PC board.
Not available: Check the outdoor PC board.
1. Check the 4-way valve.
2. Check the 2-way valve and check valve.
3. Fault with indoor heat exchanger sensor.
4. Check the indoor PC board.
1. Compressor case thermostat, IOL, OL operation.
(contactor OFF, compressor stops: AH8 Models)
(contactor ON, compressor stops: AH Models)
2. Indoor heat-exchange sensor out of place.
3. Check the indoor PC board.
4. Check that service valves are OPEN.
1. Check the charged amount of refrigerant gas.
(Gas shortage → gas supplement, check for gas leaks)
2. Indoor fan locked.
1. Check the defrosting sensor.
2. Check the outdoor PC board.
Fax: 01823 665807