Toshiba RAS-10SAV-A Service Manual page 65

Block distinction
Check Check
Block
code code
Ondoor
P .C.
board
Not
displayed
Ondoor
P .C.
board
Others
(including
compres-
sor)
Operation of diagnosis function
Air conditioner
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 heat exchanger
temp. sensor error
Compressor drive output
error, Compressor error
(lock, missing, etc.),
Break down
Return serial signal has
been sent when operation
started, but it is not sent
from halfway.
(1) Compressor thermo.
operation
Gas shortage
Gas leak
(2) Instantaneous power
failure
Compressor does not
rotate. (Current protective
circuit does not operate
when a specified time
passed after compressor
had been activated.)
Discharge temp. exceeded
117°C
Break down of compressor
Four-way valve inverse error
(TC sensor value lowered
during heating operation.)
Remarks
status
Displayed when
All off
error is detected.
Displayed when
All off
error is detected.
All off Displayed when
error is detected.
All off Displayed when
error is detected.
Displayed when
All off
error is detected.
All off Displayed when
error is detected.
–––
Operation
continues.
Displayed when
All off
error is detected.
Flashes when
Operation
continues. trouble is
detected on
return serial
signal, and
normal status
when signal is
reset.
All off Displayed when
error is detected.
All off
Displayed when
error is detected.
All off
Displayed when
error is detected.
–––
Operation
continues.
– 64 –
FILE NO. SVM-7008
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 outdoor temp. 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 heat exchanger
temp. sensor (TE).
2. Check P.C. board.
When 20 seconds passed after
startup, position-detect circuit error
occurred. : Replace compressor.
1. Repeat Start and Stop with
interval of approx. 10 to 40
minutes. (Code is not displayed
during operation.)
Supply gas. (Check also gas leak.)
2. Unit operates normally during
check.
If return serial signal does not
stop between indoor terminal
block, 2 and 3 replace inverter
P.C. board.
If signal stops between indoor
terminal block, 2 and 3 replace
indoor P.C. board.
1. Trouble on compressor
2. Trouble on wiring of compressor
(Missed phase)
1. Check discharge 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.)
1. Check 4-way valve operation.