Toshiba MiNi-SMMS MCY-MAP0501HT Service Manual page 131

Check code Check code name
[F16] / [43] Outdoor pressure sensor miscabling
(Pd, Ps)
(TCC-L / AI-NET)
NO
Are connection of Pd sensor and
Ps sensor connectors correct?
YES
NO
Are output voltage characteristics of
Pd sensor and Ps sensor normal?
YES
* 1 Pressure (Check joint) by pressure gauge
2 Pressure display on 7-segment display
3 Output voltage of I/F P.C. board
If 1 and 2, 3 are different, an error of pressure sensor itself is considered.
If 2 and 3 are different, check interface P.C. board.
NO
Are Pd/Ps output values Pd > Ps
during compressor operation?
YES
* Value can be confirmed by 7-segment display function on outdoor I/F P.C. board.
Pd SW01/02/03=1/1/2
Ps SW01/02/03=1/2/2
®
Check outdoor I/F P.C. board.
Defect Replace
Check code Check code name
[F23] / [43] Ps sensor error
(TCC-L / AI-NET)
NO
Is connection of Ps sensor
connector correct?
Connector: CN500, White
YES
NO
Are output voltage characteristics
of Ps sensor normal?
YES
* 1 Pressure (Check joint) by pressure gauge
2 Pressure display on 7-segment display
3 Output voltage of I/F P.C. board
If 1 and 2, 3 are different, an error of pressure sensor itself is considered.
If 2 and 3 are different, check interface P.C. board.
Is not refrigerant by
NO
Is there no leakage
passed from discharge to
from SV4 valve?
suction of 4-way valve?
YES
Replace SV4 valve. Check 4-way valve.
Cause of operation
1. High-pressure Pd sensor and low-
pressure sensor Ps are exchanged.
2. Output voltage of each sensor is zero.
Correct connection of connectors.
Pd sensor: CN501, Red
Ps sensor: CN500, White
®
Sensor error Replace
Check compressor.
Cause of operation
Output voltage error of Ps sensor
Correct connection.
Sensor error
NO
Check compressor.
YES
Check code Check code name
[F24] / [43] Pd sensor error
(TCC-L / AI-NET)
It is output voltage error of Pd sensor. Check disconnection of connection of connector (Pd sensor: CN501) circuit
and output voltage of sensor.
If the sensor is normal, replace outdoor I/F P.C. board.
Check code Check code name
[F29] / [12] Indoor other error
(TCC-L / AI-NET)
This error is detected during operation of air conditioner of IC10 non-volatile memory (EEPROM) on indoor unit P.C.
board. Replace service P.C. board.
∗ If EEPROM was not inserted when power was turned on or it is absolutely impossible to read/write EEPROM data,
the automatic address mode is repeated. In this case, [97 error] is displayed on AI-NET central controller.
(Approx. 3 minutes) (Approx. 1 minute)
(Power ON) [SET DATA] is displayed
on main remote controller.
Check code Check code name
[F31] / [1C] Outdoor EEPROM error
(TCC-L / AI-NET)
YES
Is there any trouble of
outdoor unit power supply?
NO
Check I/F P.C. board.
Cause of operation
Output voltage error of Pd sensor
Cause of operation
Indoor P.C. board error
EEROM error
[SET DATA] LED (D02) 1Hz flashes Reboot
disappears. for approx. 10 seconds (Reset)
on indoor unit P.C. board.
(Repetition)
Cause of operation
1. Outdoor unit power error (Voltage, noise, etc.)
2. Outdoor I/F P.C. board error
Check power voltage and line.
Correct power line.
Check external noise, etc.