Toshiba RAS-M16PKVP-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
Cause of operation conditioner
status
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 the outdoor heat
exchanger sensor (TE) or
suction temp. sensor (TS)
Disconnection or short-
circuit of discharge temp.
sensor
Outdoor fan drive system
error
Being out of place, Operation
disconnection or short- continues
circuit of the outdoor temp.
sensor (TO)
Compressor drive output
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
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
4-way valve inverse error Operation
(TC sensor value lowered continues
during heating operation.)
P .M.V. error
– 98 –
Air
Remarks
All off Displayed when Even if trying operation again, all
error is detected. operations stop immediately. :
Replace P .C. board.
All off Displayed when 1. Even if connecting lead wire of
error is detected.
2. Measure resistance between wires of
All off Displayed when Even if trying operation again, all
error is detected. operations stop immediately. :
Replace P .C. board.
All off Displayed when 1. Check sensors (TE, TS).
error is detected.
2. Check P .C. board.
All off Displayed when 1. Check discharge temp. sensor (TD).
error is detected.
2. Check P .C. board
All off 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.
All off 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
• Check outdoor P .C. board.
Flashes when 1. Repeat Start and Stop with interval of
trouble is detected
on return serial
signal, and normal
status when signal
2. Unit operates normally during check.
is reset.
All off Displayed when 1. Trouble on compressor
error is detected.
2. Trouble on wiring of compressor
All off Displayed when 1. Check dischage temp. sensor (TD).
error is detected.
2. Gas leakage
3. Trouble on PMV.
All off Displayed when 1. Check power voltage.
error is detected.
2. Overload operation of refrigeration
1. Check 4-way valve operation.
——
Displayed when 1. Check LED (D800–D805) on inverter
All off
error is detected.
2. Check connection of P .M.V. wiring.
3. Start operation. (Excluding error room)
4. If the same error is occurred.
Judgment and action
compressor is removed, position-
detect circuit error occurred. : Replace
P .C. board.
compressor, and perform short-circuit.
: Replace compressor.
outdoor P .C. board.
approx. 10 to 40 minutes. (Code is not
displayed during operation.)
Supply gas. (Check also gas leak).
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.
(Missed phase)
(220–230–240 V +10%)
cycle
Check installation condition
(Short-circuit of outdoor diffuser).
P .C. board.
Replace P .M.V.