Toshiba RAS-B10UFV-E Service Manual page 81

Block distinction
Check Check
Block
code code
Outdoor P.C.
board
Not
displayed
Outdoor P.C.
board
Operation of diagnosis function
Cause of operation conditioner
Inverter over-current All off
protective circuit
operates. (Short time)
Position-detect circuit All off
error or short-circuit
between windings of
compressor
Current-detect circuit All off
error
Being out of place, All off
disconnection or short-
circuit of the outdoor
heat exchanger sensor
(TE) or suction temp.
sensor (TS)
Disconnection or short- All off
circuit of discharge
temp. sensor
Outdoor fan drive All off
system error
Outdoor heat exchanger Operation
temp. sensor error continues
Compressor drive output All off
error, Compressor error
(lock, missing, etc.),
Break down
– 81 –
Air
Remarks
status
Displayed when
error is detected.
Displayed when
error is detected.
Displayed when
error is detected.
Displayed when
error is detected.
Displayed when
error is detected.
Displayed when
error is detected.
——
Displayed when
error is detected.
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.
1. Check sensors (TE, TS).
2. 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.
1. Check power voltage.
(220–230–240 V +10%)
2. Overload operation of refrigera-
tion cycle
Check installation condition
(Short-circuit of outdoor diffuser).
3. When 20 seconds passed after
start-up, position-detect circuit
error occurred. : Replace
compressor. Trouble on P.M.V.