Grant Aerona3 HPID12R32, Installation And Servicing Instructions

Page: 53 / 72

section 11: fault finding Page 53
11.4 Error codes
Error
code
Error method of check troubleshooting
figure/
table
Error
reset
- -
Power supply Check the power supply Confirm the power supply -
-
Fuse CF1
HPID12R32:
250V 30A
Check the electric continuity of Fuse
CF1 by tester
If CF1 is blown, Main PCB should be
replaced
Figure
11-3
Fuse CF3
(250V 3A)
Check the electric continuity of Fuse
CF3 by tester
If CF3 is blown, Main PCB should be
replaced
Main PCB Other than described above Main PCB should be replaced -
A0 DC voltage error
Fan motor
Operate without lead wire for Fan motor
Check the electric continuity of Fuse by
tester
If the same error code appears again,
Main PCB or Pump should be replaced
If other error codes appear, Fan motor
should be replaced
-
Power
OFF
Fuse CF6
HPID12R32:
250V 3A
If CF6 is blown,it should be replaced
Figure
11-4
Fuse CF7
HPID12R32:
250V 3A
If CF7 is blown,it should be replaced
Pump
Operate without lead wire for
Pump
If the same error code appears again,
Main PCB or Fan motor should be
replaced
If other error codes appear, Pump
should be replaced
-
Reactor
Check the resistance by tester
(0.1Ω at 20°C)
If the reactor is faulty, is should be
replaced.
-
Main PCB
Check the voltage of Fan motor by
tester
Check the voltage of Pump by tester
If the voltage is abnormal, PCB (Main
should be replaced
Figure
11-4,
11-5
Power supply Check the power supply Confirm the power supply -
A1
Discharge
temperature error
Sensor, Temp.
Discharge
Check the resistance by tester
If the sensor is faulty, it should be
replaced
Figure
11-12
Auto
Gas leakage
Check the service valve and refrigerant
circuit (pipe)
Collect refrigerant once, then recharge
with prescribed mass
-
A2
Protective action
against excess
Current DC
current detection
Unreasonable
operation under/
overload
Check the place of installation (blockage
of air inlet & outlet)
Check the excess gas
Ensure the installation position to avoid
blockage of air inlet & outlet
- Manual
If excess gas is observed, collect all
refrigerant once, then recharge with
prescribed mass
Drop of power
voltage
Check the power voltage
(230V)
Confirm the power supply voltage
(230V)
Main PCB
Operate without the junction connector
of Compressor lead wire
If the same error code appears again,
Main PCB should be replaced
Momentary stop
of power
(In case of
lightning)
- Restart operation
Compressor Other than described above Compressor should be replaced
A3 CT disconnection Main PCB - Main PCB should be replaced -
Manual
A4
Protective action
against excess
Current AC
current detection
Unreasonable
operation under/
overload
Check the place of installation (blockage
of air inlet & outlet)
Check the excess gas
Ensure the installation position to
avoid blockage of air inlet & outlet
-
If excess gas is observed, collect all
refrigerant once, then recharge with
prescribed mass
Drop of power
voltage
Check the power voltage
(230V)
Confirm the power supply voltage
(230V)
Momentary stop
of power (In case
of lightning)
- Restart operation