Toshiba RAS-B10U2FVG-E Service Manual page 71

Block distinction
Check Check
Block
code code
Outdoor P.C.
board
Operation of diagnosis function
Cause of operation
Current on inverter circuit
is over limit in short time.
Inverter P.C. board is
failure, IGBT shortage, etc.
Compressor current is
higher than limitation,
lock rotor, etc.
Compressor position-detect
circuit error or short-circuit
between winding of
compressor.
Current-detect circuit of
inverter P.C. board error.
TE or TS sensor; abnormal.
Out of place, disconnection,
shortage, or misconnection
(TE sensor is connected to TS
connector, TS sensor is
connected to TE sensor
connector)
TE sensor; Outdoor heat
exchanger temperature sensor
TS sensor; Suction pipe
temperature sensor
TD sensor ; Discharge pipe
temperature sensor is
disconnection or shortage.
Outdoor fan failure or its
drive-circuit on the inverter
P.C. board failure.
TO sensor ; The outdoor
temperature sensor is
disconnection or shortage.
Air
Display flashing
conditioner
error
status
All OFF Flashes after
error is detected
8 times*.
All OFF Flashes after
error is detected
8 times*.
All OFF Flashes after
error is detected
4 times*.
All OFF Flashes after
error is detected
4 times*.
All OFF Flashes after
error is detected
4 times*.
All OFF Flashes after
error is detected
8 times*.
Operation Record error
continues. after detected
4 times*.
But does not
flash display.
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FILE NO. SVM-18048
Action and Judgment
1. Remove connecting lead wire of the
compressor, and operate again.
2. If outdoor fan does not operate or
operate but stop after some period,
replace the inverter P.C. board.
3. If outdoor fan operates normally,
measure 3-Phase output of inverter
P.C. board (150-270VAC) at the
connecting lead wire of compressor.
4. If 3-Phase output is abnormal, replace
inverter P.C.Board.
5. If 3-Phase output is normal, replace
compressor. (lock rotor, etc.)
1. Remove connecting lead wire of the
compressor, and operate again.
2. If outdoor fan does not operate or
operation but stop after some period,
replace the inverter P.C. board.
3. If outdoor fan operates normally,
measure resistance of compressor
winding. If circuit is shortage, replace
the compressor.
Even if trying to operate again, all
operations stop, replace inverter
P.C. board.
1. Check sensors, TE, TS connection. In
case of sensors and it's connection is
normal, check the inverter P.C. board
2. Check 4way valve operation/position.
In case TE, TS detected temperature
relationship are different from normal
operation, "18" might be detected.
1. Check sensors TD and connection.
2. In case of the sensor and its
connection is normal, check the
inverter P.C. board.
1. Check the motor, measure winding
resistance, shortage or lock rotor.
2. Check the inverter P.C. board.
1. Check sensors TO and connection.
2. In case of the sensor and its
connection is normal, check the
inverter P.C. board.