36
HWE1305A
TROUBLESHOOTING
Note: Refer to the manual of outdoor unit for the detail of remote controller.
Phenomena
Cause
Countermeasure
(2) LED2 on indoor controller board is
blinking.
•
When LED1 on indoor controller board is
also blinking.
Connection failure of indoor/outdoor unit
connecting wire
Check indoor/outdoor unit connecting wire for
connection failure.
•
When LED1 is lit.
1
Miswiring of remote controller wires
Under twin triple indoor unit system, 2 or
more indoor units are wired together.
1
Check the connection of remote controller
wires in case of twin triple indoor unit
system. When 2 or more indoor units are
wired in one refrigerant system, connect
remote controller wires to one of those
units.
2
Refrigerant address for outdoor unit is
wrong or not set.
Under grouping control system, there are
some units whose refrigerant address is 0.
2
Check the setting of refrigerant address in
case of grouping control system.
If there are some units whose refrigerant
addresses are 0 in one group, set one of
the units to 0 using SW1 (3-6) on outdoor
controller circuit board.
3
Short-circuit of remote controller wires
4
Defective remote controller
34
Remove remote controller wires and
check LED2 on indoor controller board.
•
When LED2 is blinking, check the short-
circuit of remote controller wires.
•
When LED2 is lit, connect remote controller
wires again and:
if LED2 is blinking, remote controller is
defective; if LED2 is lit, connection failure of
remote controller terminal block etc. has
returned to normal.
(3) Upward/downward vane
performance failure
1
The vane is not downward during
defrosting and heat preparation and when
the thermostat is OFF in HEAT mode.
(Working of COOL protection function)
1
Normal operation (The vane is set to
horizontal regardless of remote control.)
2
Vane motor does not rotate.
•
Defective vane motor
•
Breaking of wire or connection failure of
connector
2
Check
2
(left).
•
Check the vane motor. (Refer to 9-6. How
to check the parts.)
•
Check for breaking of wire or connection
failure of connector.
3
Upward/downward vane does not work.
•
The vane is set to fixed position.
3
Normal operation (Each connector on vane
motor side is disconnected or setting the
fixed vanes by wired remote controller.)
(4) Receiver for wireless remote
controller
1
Weak batteries of wireless remote
controller
1
Replace batteries of wireless remote
controller.
2
Contact failure of connector (CNB) on
wireless remote controller board
(Insert failure)
3
Contact failure of connector (CN90) on
indoor controller board (Insert failure)
4
Contact failure of connector between
wireless remote controller board and
indoor controller board
2
~
4
Check contact failure of each connector.
If no problems are found of connector,
replace indoor controller board.
When the same trouble occurs even if
indoor controller board is replaced, replace
wireless remote controller board.
