Toshiba RAS-M10PKVP-E Service Manual page 98

Block distinction
Check Check
Block
code code
Outdoor P .C.
board
Not
displayed
Outdoor P .C.
board
Others
(including
compressor)
Operation of diagnosis function
Air
Cause of operation conditioner
status
Inverter over-current All off
protective circuit operates.
(Short time)
Position-detect circuit error All off
or short-circuit between
windings of compressor
Current-detect circuit error All off
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 system All off
error
Being out of place, Operation
disconnection or short- continues
circuit of the outdoor temp.
sensor (TO)
Compressor drive output All off
error, Compressor error
(lock, missing, etc.), Break
down
• Disconnection or short-
circuit of the gas side
sensor (TG).
• Communication error
between MCUs on
outdoor P .C. board.
Return serial signal has Operation
been sent when operation continues
started, but it is not sent
from halfway.
1) Compressor thermo.
operation
Gas shortage
Gas leak
2) Instantaneous power
failure
Compressor does not All off
rotate. (Current protective
circuit does not operate
when a specified time
passed after compressor
had been activated.)
Discharge temp. exceeded All off
117°C
Break down of All off
compressor
4-way valve inverse error
Operation
(TC sensor value lowered continues
during heating operation.)
P .M.V. error All off
– 98 –
Judgment and action
Remarks
Displayed when Even if trying operation again, all
error is detected. operations stop immediately. :
Replace P .C. board.
Displayed when 1. Even if connecting lead wire of
error is detected. 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.
Displayed when Even if trying operation again, all
error is detected. operations stop immediately. :
Replace P .C. board.
Displayed when 1. Check sensors (TE, TS).
error is detected.
2. Check P .C. board.
Displayed when 1. Check discharge temp. sensor (TD).
error is detected.
2. Check P .C. board
Displayed when Position-detect error, over-current
error is detected. 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.
Displayed when Check 6-serial LED.
error is detected. When 20 seconds passed after start-up,
position-detect circuit error occurred. :
Replace compressor. Trouble on P .M.V.
• Check gas side temp. sensor (TG).
• Check P .C. board.
• Check communication wire between
outdoor P .C. board.
• Check outdoor P .C. board.
Flashes when 1. Repeat Start and Stop with interval of
trouble is detected approx. 10 to 40 minutes. (Code is not
on return serial displayed during operation.)
signal, and normal Supply gas. (Check also gas leak).
status when signal
2. Unit operates normally during check.
is reset.
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.
Displayed when 1. Trouble on compressor
error is detected.
2. Trouble on wiring of compressor
(Missed phase)
Displayed when 1. Check dischage temp. sensor (TD).
error is detected.
2. Gas leakage
3. Trouble on PMV.
Displayed when 1. Check power voltage.
error is detected. (220–230–240 V +10%)
2. Overload operation of refrigeration
cycle
Check installation condition
(Short-circuit of outdoor diffuser).
1. Check 4-way valve operation.
——
Displayed when 1. Check LED (D800–D805) on inverter
error is detected. P .C. board.
2. Check connection of P .M.V. wiring.
3. Start operation. (Excluding error room)
4. If the same error is occurred.
Replace P .M.V.