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6.4.3 List of check code
CHECK CODE
SYMPTOM
DIAGNOSTIC FUNCTIONS
STATUS OF AIR
CONDITIONER
JUDGEMENT AND ACTION
1) Indoor heat exchange
temperature does not
change after starting
cooling operation.
2) When transmitting
instruction for stopping
compressor by freeze
preventing control.
1.
Check the wiring between remote control unit and
indoor unit.
2.
Check the indoor unit PC board.
1.
Fault in optional drain pump.
2.
Drain pipe blocked.
3.
Check the indoor PC board.
Outdoor unit
stops
OTHER CYCLE
SYSTEM
DRAIN PUMP
WRONG WIRING OF
REMOTE CONTROL
UNIT
Outdoor unit
stops
(indoor fan L)
Operation
continuing
1.
Check the charged amount of refrigerant gas.
(Gas shortage
Ý
gas supplement, check for gas leaks)
2.
Indoor fan locked.
1.
Compressor case thermostat, IOL, OL operation.
(contactor OFF, compressor stops: A8 Models)
(contactor ON, compressor stops: A Models)
2.
Indoor heat-exchanger sensor out of place.
3.
Check the indoor PC board.
4.
Check that service valves are open.
INDOOR
HEAT-EXCHANGER
SENSOR (TC)
Out of place, break,
short-circuit.
Operation
continuing
1.
Check the indoor heat-exchanger sensor.
2.
Check the indoor PC board.
Out of place, break,
short-circuit.
ROOM TEMP.
SENSOR (TA)
Operation
continuing
1.
Check the indoor temp. sensor.
2.
Check the indoor PC board.
Full stop
Indoor unit does not
operate at all.
Heronhill - for all your Toshiba requirements
Tel: 01823 665660
www.heronhill.co.uk
Fax: 01823 665807
