Toshiba RAV-104SBH-PE Service Manual page 87

6.4 List of Check Codes
DIAGNOSTIC FUNCTIONS
CHECK
CODE
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6. THE REMOTE CONTROLLERS
SYMPTON
ROOM TEMP.
SENSOR (TA)
Out of place, break,
short-circuit
INDOOR
HEAT-EXCHANGER
SENSOR (TC)
Out of place, break,
short-circuit
RETURNING 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.
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STATUS JUDGEMENT AND ACTION
OF AIR
CONDITIONER
Operation continuing 1. Check the indoor temp. sensor
2. Check the indoor PCB.
Operation continuing 1. Check the indoor heat-exchanger
sensor.
2. Check the indoor PCB.
Operation continuing 1. If Outdoor Unit does not work at all.
(1) Check the connecting cable for
incorrect wiring.
(2) Check the outdoor PCB.
2. It operates normally.
Between indoor terminal plates 2 and 3,
return signal is:
Available:
Not available: Check the outdoor PCB.
Operation continuing 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 PCB.
Operation continuing 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 PCB
4. Check that service valves are OPEN.
Outdoor Unit stops 1. Check the charged amount of refrigerant
(indoor fan L) gas.
(Gas shortage➔gas supplement, check
for gas leaks)
2. Indoor fan locked.
Full Stop 1. Check the defrosting sensor.
2. Check the outdoor PCB.
87
Check the indoor PCB.
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