35
HWE1305A
TROUBLESHOOTING
9-4. Troubleshooting of problems
Note: Refer to the manual of outdoor unit for the detail of remote controller.
Phenomena
Cause
Countermeasure
(1) LED2 on indoor controller board is
off.
•
When LED1 on indoor controller board is also
off.
1
Power supply of rated voltage is not
supplied to outdoor unit.
1
Check the voltage of outdoor power supply
terminal block(L,N) or (L3,N).
•
When AC220~240V is not detected, check
the power wiring to outdoor unit and the
breaker.
•
When AC 220~240V is detected, check
2
(below).
2
Defective outdoor controller circuit board
2
Check the voltage between outdoor
terminal block S1 and S2.
•
When AC 220~240V is not detected, check
the fuse on outdoor controller circuit board,
check the wiring connection.
•
When AC 220~240V is detected, check
3
(below).
3
Power supply of 220~240V is not supplied
to indoor unit.
3
Check the voltage between indoor terminal
block S1 and S2.
•
When AC 220~240V is not detected, check
indoor/outdoor unit connecting wire for
miswiring.
•
When AC 220~240V is detected, check
4
(below).
4
Defective indoor controller board
4
Check the fuse on indoor controller board.
Check the wiring connection.
If no problem are found, indoor controller
board is defective.
(For the separate indoor/outdoor unit
power supply system)
1
Power supply of 220~240V AC is not
supplied to indoor unit.
1
Check the voltage of indoor power supply
terminal block (L,N).
•
When AC220~240V is not detected, Check
the power supply wiring.
•
When AC220~240V is detected, check
2
(below).
2
The connectors of the optional
replacement kit are not used.
2
Check that there is no problem in the
method of connecting the connectors.
•
When there are problems in the method of
connecting the connectors.
Connect the connector correctly referring to
installation manual of an optional kit.
•
When there is no problem in the method of
connecting the connectors, check
3
(below).
3
Defective indoor controller board
3
Check the fuse on indoor controller board.
Check the wiring connection.
If no problem are found, indoor controller
board is defective.
•
When LED1 on indoor controller board is lit.
1
Mis-setting of refrigerant address for
outdoor unit
(There is no unit corresponding to
refrigerant address “0”.)
1
Check again the setting of refrigerant
address for outdoor unit.
Set the refrigerant address to “0”.
(For grouping control system under which
2 or more outdoor units are connected, set
one of the units to “0”.)
Set refrigerant address using SW1 (3-6) on
outdoor controller circuit board.
