Toshiba RAS-B10UFV-E Service Manual page 82

Block distinction
Check Check
Block
code code
Others
(including
compressor)
Operation of dia gnosis function
Cause of operation conditioner
Operation
Return serial signal has
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
4-way valve inverse error Operation
(TC sensor value continues
lowered during heating
operation.)
– 82 –
Air
Remarks
status
Flashes when
trouble is detected
on return serial
signal, and normal
status when signal
is reset.
Displayed when
error is detected.
Displayed when
error is detected.
Displayed when
error is detected.
——
Judgment and action
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 dischage temp. sensor
(TD).
2. Gas leakage
3. Trouble on P.M.V.
1. Check power voltage.
(220–230–240 V +10%)
2. Overload operation of refrigera-
tion cycle
Check installation condition
(Short-circuit of outdoor diffuser).
1. Check 4-way valve operation.