Toshiba RAS-07PKVP-E Service Manual page 78

High Wall, Heat Pump Type
10-6-2. Check Code
1) After servicing, push the START/STOP button to return to the normal mode.
2) After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power
supply again so that memory in the microcomputer returns the initial status.
However, the check codes are not deleted even if the power supply is turned off because they are stored
in the fixed memory.
3) After servicing, push [CLR] button under check mode status and then send the check code "7F" to the
indoor unit. The error code stored in memory is cleared.
Table 10-6-1
Block distinction
Check Check
Block
code code
Indoor P.C.
board etc.
Not
displayed
Connecting
cable and
serial signal
Outdoor
P.C. board
Operation of diagnosis function
Cause of operation conditioner
status
Short-circuit or Operation
disconnection of the room
continues.
temperature sensor
(TA sensor).
Being out of place, Operation
disconnection, short- continues.
circuit, or migration of heat
exchanger sensor
(TC sensor)
Being out of place, Operation
disconnection, short- continues.
circuit, or migration of heat
exchanger sensor
(TCj sensor)
Lock of indoor fan or
trouble on the indoor fan
circuit
Trouble on other indoor Operation
P.C. boards
continues.
Return serial signal is not Operation
sent to indoor side from continues.
operation started.
1) Defective wiring of
connecting cable
2) Operation of
compressor thermo Gas
shortage Gas leak
Inverter over-current
protective circuit operates.
(Short time)
Position-detect circuit error
or short-circuit between
windings of compressor
Current-detect circuit error
78
Air
Remarks
Displayed when 1) Check the room temp. sensor.
error is detected.
2) When the room temp. sensor is normal,
Displayed when 1) Check heat exchanger sensor.
error is detected.
2) When heat exchanger sensor is normal,
Displayed when 1) Check heat exchanger sensor.
error is detected.
2) When heat exchanger sensor is normal,
All off Displayed when 1) Check the motor.
error is detected.
2) When the motor is normal, check P.C.
Displayed when 1) Replace P.C. board.
error is detected.
Flashes when 1) When the outdoor unit never operate:
trouble is
detected on
Return serial
signal, and
normal status
when signal is
reset.
2) To display [Other] block during
3) Unit operates normally during check.
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.
Service Manual
Judgment and action
check P.C. board.
check P.C. board.
check P.C. board.
board.
• Check connecting cable, and correct if
defective wiring.
• Check 25A fuse of inverter P.C. board.
• Check 6.3A fuse of connecting cable
of inverter unit and outdoor unit.
operation, check compressor thermo.
operation and supply gas (check gas
leak also).
If return serial signal does not stop
between indoor terminal board 2 and 3,
replace inverter P.C. board.
If signal stops between indoor terminal
board 2 and 3, replace indoor P.C.
board.
compressor is removed, position detect
circuit error occurred. :
Replace P.C. board.
compressor, and perform short-circuit. :
Replace compressor.