Fujitsu AW?Z24LBC, Service Instruction

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Self - diagnosis function and Checking points
Error Indication
Operation
(RED)
Timer
(GREEN)
Error
(Protection)
Diagnosis Method
Abnormal current value of IPM is detected. > Permanent stop.
07-05
CT error
IPM protection
[Diagnosis Point]
Heat radiation is blocked (inlet/outlet). Check if outdoor fan is defective (does not rotate). Controller PCB defective (Refer to after mentioned "IPM diagnosis"). Refrigeration cycle defective (Refer to after mentioned "refrigeration cycle diagnosis").
The current value during the operation after 1 minute from starting up the compressor is 0A. > permanent stop. [Diagnosis Point]
Check if CT wire is open. Controller PCB defective.
The compressor speed does not synchronize with the control signal. (Including start up failure of the compressor). > permanent stop. [Diagnosis Point]
Check if 2-way valve or 3-way valve is left open. Check the compressor (Winding resistance value, loose lead wire). Refrigeration cycle defective (Refer to after mentioned "refrigerant cycle diagnosis")
Either the outdoor fan motor abnormal current or location error was detected. > Permanent stop. [Diagnosis Point]
Fan motor connector loose/ defective contact. Fan motor defective. Controller PCB defective.
Compressor location error Outdoor fan error (DC motor)
0.5 sec 2 times 0.5 sec 3 times 0.5 sec 5 times 0.5 sec 6 times
0.5 sec 5 times