Toshiba RAS-07PKVP-E Service Manual page 79

High Wall, Heat Pump Type
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
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
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.)
79
Air
Remarks
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 1) Check power voltage.
error is detected.
2) Overload operation of refrigeration cycle
3) When 20 seconds passed after start-up,
Flashes when 1) Repeat Start and Stop with interval of
trouble is
detected on
return serial
signal, and
normal status 2) Unit operates normally during check.
when signal 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 discharge temp. sensor (TD).
error is detected.
2) Gas leakage
3) Trouble on P.M.V.
All off Displayed when 1) Check power voltage.
error is detected.
2) Overload operation of refrigeration cycle
—— 1) Check 4-way valve operation.
Service Manual
Judgment and action
(220–230–240 V +10%)
Check installation condition (Short-
circuit of outdoor diffuser).
position-detect circuit error occurred. :
Replace compressor.
Trouble on P.M.V.
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%)
Check installation condition (Short-
circuit of outdoor diffuser).