Toshiba RAV-SM562KRT-E Service Manual page 35

Failure mode detected by outdoor unit (Representative codes)
• The check code used varies depending on the combination with the outdoor unit.
Check code Possible causes
H01 Compressor breakdown
• Compressor stops due to
operating frequency decrease.
H02 Compressor does not work.
• Overcurrent protection circuit is
activated after a certain time from
compressor startup.
H03 Failure of current detect circuit
• Large AC current even during
compressor OFF
• Phase loss in power supply
H06*1 Low-pressure switch ON
(applicable models)
COOL : 30 seconds
HEAT : 10 minutes
L29 Other outdoor unit errors
• CDB-IPDU communication error
(connector disconnection)
• Abnormal heatsink temperature
(over specified value)
L31*1 Phase detection protection circuit
activated (normal models)
P03 Abnormal discharge temperature
(over specified value)
P04 Failure of high-pressure protection circuit
(Temperature over specified value
detected by TE sensor)
High-pressure switch (normal models)
P22 Failure of outdoor unit DC fan
P26 Inverter overcurrent protection
circuit activated (short time)
Main circuit short voltage operation
P29 Failure of IPDU position detect
circuit
F04 Improper mounting, disconnection
or short-circuit of outdoor unit temp.
sensor TD
F06 Improper mounting, disconnection
or short-circuit of outdoor unit temp.
sensor TE, TS
F08 Improper mounting, disconnection
or short-circuit of outdoor unit
outside air temp. sensor TO
*1 ROA-P*** is not detected by 1HS models.
Fan continues rotating in a failure mode detected by outdoor unit because there is no communication between outdoor unit
and follower indoor unit in twin group.
Diagnosis function
Air conditioner status
OFF
OFF
OFF
OFF
OFF
Operation
continued
(compressor
OFF)
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Operation
continued
Conditions
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
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34
Judgment and action
1. Check power voltages (200±20 VAC).
2. Freezing cycle overload operation
3. Check current detect circuit on the AC side.
1. Failure of compressor (lock, etc.)
... Replace the compressor.
2. Improper compressor wiring (phase loss)
3. Lost-phase operation of power
supply (3-phase models)
1. Operation stops soon when restarted.
... Check IPDU.
2. Lost-phase operation of power supply
Check 3-phase power voltages and wiring.
1. Check freezing cycle (gas
leakage).
2. Check low-pressure switch circuit.
3. Check outdoor unit CDB board.
1. Check CDB/IPDU wiring.
2. Freezing cycle overload operation
1. Check phase sequence, reverse
phase, and phase loss.
2. Check outdoor unit boards.
3. Check high-pressure switch.
4. Check high-pressure switch circuit wiring.
1. Check freezing cycle (gas leakage).
2. Failure of electronic expansion valve
3. Check piping sensor (Td).
1. Freezing cycle overload operation
2. Check outdoor unit TE sensor.
3. Check outdoor unit CDB board.
4. Check high-pressure switch and circuit.
1. Position detect error
2. Overcurrent protection circuit
operation of outdoor unit fan driver
3. Outdoor unit fan lock
4. Check outdoor unit CDB board.
1. Operation stops soon when restarted.
... Compressor partial short-circuit
2. Check IPDU for improper wiring.
1. The circuit is activated even after
compressor's 3P connector is
disconnected. ...Replace IPDU.
1. Check TD.
2. Check outdoor unit CDB board.
1. Check TE, TS.
2. Check outdoor unit CDB board.
1. Check TO.
2. Check outdoor unit CDB board.