Sinclair SDV5 Series Service Manual page 56

2.13.5 Procedure
Check LED301 Is
Check the wiring between main control
board and filter board is correct or not.
Voltage of power supply is 166-265V?
2.14 H0: Communicate malfunction between inverter module board and main control board (for all
models)
2.14.1 Digital display output
H0
2.14.2 Description
 Communicate malfunction between inverter module board and main control board protection.
 The system stops running.
 Error code is displayed on the unit with the error.
2.14.3 Trigger / recover condition
 Trigger condition: Communicate malfunction between inverter module board and main control board.
 Recover condition: Communicate between inverter module board and main control board is normal.
 Reset method: Resume automatically.
2.14.4 Possible causes
 DC fan motor damaged.
 The wire connect CN52 with CN53 is loose (100/120 model can ignore this reason for there's not this wire
connection).
 Main control board damaged.
 Filter board damaged (100/120 model can ignore this reason for they don't have a filter board).
F1
flashing or not
Yes
Yes
No
Replace outdoor main PCB
No
Connect again
No Provide normal power supply
55