Toshiba RAS-10YAV-E Service Manual page 45

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 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 outdoor temp.
sensor
Disconnection or short- All off
circuit of discharge temp.
sensor
Outdoor fan drive system All off
error
Outdoor heat exchanger Operation
temp. sensor error continues
Compressor drive output All off
error, Compressor error
(lock, missing, etc.),
Break down
Return serial signal has Operation
been sent when continues
operation 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. All off
exceeded 117°C
Break down of All off
compressor
Four-way valve inverse Operation
error continues
(TC sensor value
lowered during heating
operation.)
– 45 –
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 outdoor temp. sensors
error is detected. (TE, TS).
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 heat exchanger temp.
sensor (TE).
——
2. Check P.C. board.
Displayed when When 20 seconds passed after start-
error is detected. up, position-detect circuit error
occurred. : Replace compressor.
Flashes when 1. Repeat Start and Stop with interval
trouble is detected of approx. 10 to 40 minutes. (Code is
on Return serial not 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. Degassing
3. Trouble on P.M.V.
Displayed when 1. Check power voltage.
error is detected. (220–30–40 V+10%)
2. Overload operation of refrigeration
cycle
Check installation condition
(Short-circuit of outdoor diffuser).
1. Check four-valve operation.
——