Fujitsu AG * V09LAC Series Service Instruction page 51

Self - diagnosis function and Checking points
Error Indication
Wired remote
Operation Timer 10°C HEAT
controller
(RED) (GREEN) (ORANGE)
0.5 sec
0.5 sec
OFF
7 times
2 times
0.5 sec OFF
3 times
0.5 sec
0.5 sec OFF
8 times
4 times
Error
(Protection)
Discharge temperature
The discharge temperature error is activated. > Permanent stop.
error
[Diagnosis Point]
0F
Excessive High
Excessive high pressure protection on cooling mode has been activated.
Pressure Protection > Compressor, Outdoor Fan : OFF (It releases after 3 minute ST)
on Cooling
[Diagnosis Point]
24
PFC circuit Error
Excessive voltage of DC voltage on PFC circuit in Inverter PCB is detected, or the excessive current in the circuit is detected.
> Permanent stop.
25
[Diagnosis Point]
Check if 2 way valve or 3 way valve is left open.
Heat radiation is blocked (Inlet/Outlet)
Check if Outdoor Fan is defective (does not rotate).
Refrigeration cycle defective. (Refer to after mentioned "Refrigerant cycle diagnosis").
Heat radiation is blocked (Inlet/Outlet)
Check if Outdoor Fan is defective (does not rotate).
Refrigeration cycle defective. (Refer to after mentioned "Refrigerant cycle diagnosis").
Controller PCB defective. (Refer to after mentioned "PFC circuit diagnosis")
Diagnosis Method