Toshiba Carrier RAV-SP180AT2-UL Service Manual page 59

CODE APPLICATION CONTROL KIT
No. LED display
[P19]
∗ In case of RAV-SP180AT2-UL, the coil of 4-way valve is electrified during cooling cycling.
∗ In cooling operation, [P19] error may be displayed when the refrigerant pressure rises high abnormally.
In this case, remove the cause of pressure rising and then diagnose it again.
[P22] D01 D02
(Red) (Yellow) (Yellow) (Yellow)
[P26] D01 D02
(Red) (Yellow) (Yellow) (Yellow)
[P29] D01 D02
(Red) (Yellow) (Yellow) (Yellow)
LED display legend: Go off,
(Part without special mention indicates a part of the outdoor unit.)
— [4-way reversal error]
Does 4-way valve work correctly?
during cooling/heating operation.)
PMV under correct conditions?
TE sensor CN600, TS sensor CN603
Defective → Correct or replace
D03 D04 [Outdoor fan system error]
Is the fan motor coil resistance within the range described below?
D03 D04 [Short-circuit of compressor driving device]
(Check connection referring to the wiring diagram.)
After disconnection of the compressor leads from
P .C. board, the air conditioner operates in heating mode.
D03 D04 [Position detection circuit error]
Check outdoor P.C. board.
Go on, Flash (5Hz)
Check / Countermeasures
(Check pipe temperature, etc.
YES
NO
Check outdoor P.C. board.
Defect → Replace
Is flow of refrigerant by
YES
Check temperature sensors.
Indoor TC sensor
Is connection of connector
CN300 correct?
YES
After pulling out the connector
of the fan motor CN300, rotate its shaft by hands.
Can it rotate smoothly?
Between red and white lead
Between white and black lead : 18 to 30Ω
Between black and red lead
YES
Is AC mains voltage correct?
208/230V ± 10V
YES
Is there any problem on connection
of compressor lead or reactor?
NO
Does the fan motor run?
YES
Defective → Replace
– 59 –
NO
Is coil of 4-way valve
electrified during heating mode?
Check 4-way valve.
Defect → Replace
NO
Check PMV.
Defect → Replace
NO
Correct connection of connector.
NO
: 18 to 30Ω
: 18 to 30Ω
Check outdoor P.C. board.
Defective → Replace
NO
Correct power line.
YES
Correct wiring.
NO
Replace
outdoor P.C. board.
Check compressor. (Rare short, etc.)
Defective → Replace
YES
Fan motor
exchange