Toshiba RAS-2M14S3AV-E, Service Manual

Page: 78 / 116

Block distinction Operation of diagnosis function
Check
code
Block
Check
code
Cause of operation
Air
conditioner
status
Display flashing
error
Outdoor P.C. Current on inverter circuit All OFF Flashes after 1. Remove connecting lead wire of the
board is over limit in short time. error is detected compressor, and operate again.
8
times*. 2. If outdoor fan does not operate or
operat e but stop after some period,
replace the inverter P.C. board.
3. If outdoor fan operates normally,
Inverter P.C. board is
failure, I
PM
shortage, etc.
Compressor current is
higher than limitation,
lock rotor, etc. 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.)
Compressor position-detect All OFF Flashes after 1. Remove connecting lead wire of the
circuit error or short-circuit error is detected compressor, and operate again.
between winding of
8
times*. 2. If outdoor fan does not operate or
compressor. 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.
Current-detect circuit of All OFF Flashes after Even if trying to operate again, all
inverter P.C. board error. error is detected operations stop, replace inverter
4 times*. P.C. board.
TE sensor ; The heat All OFF Flashes after 1. Check sensors TE, TS and connection.
exchanger temperature error is detected 2. In case of the sensors and its
sensor of the outdoor unit 4 times*. connection is normal, check the
either TS sensor ; Suction inverter P.C. board.
pipe temperature sensor,
out of place, disconnection
or shortage.
TD sensor ; Discharge pipe All OFF Flashes after 1. Check sensors TD and connection.
temperature sensor is error is detected 2. In case of the sensor and its
disconnection or shortage. 4 times*. connection is normal, check the
inverter P.C. board.
Outdoor fan failure or its All OFF Flashes after 1. Check the motor, measure winding
drive-circuit on the inverter error is detected resistance, shortage or lock rotor.
P.C. board failure. 8 times*. 2. Check the inverter P.C. board.
TO sensor ; The outdoor Operation Record error 1. Check sensors TO and connection.
temperature sensor is continues. after detected 2. In case of the sensor and its
disconnection or shortage. 4 times*. connection is normal, check the
But does not inverter P.C. board.
flash display.
Action and Judgment
- 7 8 -
FILE NO. SVM-15102