Toshiba RAS-M10NKV-E Service Manual page 38

Block distinction
Check Check
Block
code code
Outdoor P.C.
board
Not
displayed
Outdoor P.C.
board
Others
(including
compressor)
Operation of diagnosis function
Cause of operation
Inverter over-current
protective circuit operates.
(Short time)
Position-detect circuit
error or short-circuit
between windings of
compressor
Current-detect circuit
error
Being out of place,
disconnection or short-
circuit of outdoor temp.
sensor
Disconnection or short-
circuit of discharge temp.
sensor
Outdoor fan drive system
error
Outdoor temp. sensor
error
Compressor drive output
error, Compressor error
(lock, missing, etc.),
Break down
Error exclusive for
multiple type
Compressor does not
rotate. (Current protective
circuit does not operate
when a specified time
passed after compressor
had been activated.)
Discharge temp. ex-
ceeded 120°C.
Break down of
compressor
– 37 –
Air
conditioner Remarkes
status
All off Displayed when
error is detected.
All off Displayed when
error is detected.
All off Displayed when
error is detected.
All off Displayed when
error is detected.
All off Displayed when
error is detected.
All off Displayed when
error is detected.
Operation
——
continues.
All off Displayed when
error is detected.
All off Displayed when
error is detected.
All off Displayed when
error is detected.
All off Displayed when
error is detected.
All off Displayed when
error is detected.
FILE NO. SVM-05019
Judgment and action
Even if trying operation again, all
operations stop immediately. : Replace
P .C. board.
1. Even if connecting lead wire of
compressor is removed, position-
detect circuit error occurred. :
Replace P.C. board.
2. Measure resistance between wires of
compressor, and perform short-
circuit. : Replace compressor.
Even if trying operation again, all
operations stop immediately. : Replace
P .C. board.
Check 5-serial LED.
1. Check P.C. board.
1. Check discharge temp. sensor (TD).
2. Check P.C. board.
Position-detect error, over-current
protective operation of outdoor fan drive
system, fan lock, etc. : Replace P.C.
board or fan motor.
1. Check outdoor temp. sensor (TO).
2. Check P.C. board.
Check 5-serial LED.
When 20 seconds passed after start-up,
position-detect circuit error occurred. :
Replace compressor.
Check 5-serial LED.
1. Miswiring of connecting wire of A/B/
C/D rooms in indoor/outdoor units
2. Check gas leakage.
3. Check disconnection of sensor.
4. Electronic control valve error
1. Trouble on compressor
2. Trouble on wiring of compressor
(Missed phase)
1. Check dischage temp. sensor (TD).
2. Degassing
3. Trouble on P.M.V.
1. Check power voltage.
(220–240 V ±10%)
2. Overload operation of refrigeration
cycle
Check installation condition
(Short-circuit of outdoor diffuser).