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[2] Operation Flow Chart
(1) Outdoor unit (Cooling, heating modes)
"HO" blinks on the remote control-
ler
Oil return LEV, SC coil LEV
fully closed
Variable capacity unit
1. 52C1, 52C2 OFF
2. Inverter output 0 Hz
3. Outdoor fan Stop
4. All solenoid valve OFF
5. LEV1, SLEV full closed.
Constant capacity unit
1. 52C OFF
2. Outdoor fan Stop
3. All solenoid valve OFF
4. LEV1, LEV2 full closed.
Note: 1
For about 2 minutes after turning on power source, address and group information of outdoor unit, indoor unit, and remote
controller are retrieved by remote controller, during which "HO" blinks on and off on remote controller. In case indoor unit is
not grouped to remote controller, "HO" display on remote controller continues blinking even after 2 minutes after turning on
power source.
Note: 2
Two trouble modes included indoor unit side trouble, and outdoor unit side trouble. In the case of indoor unit side trouble,
error stop is observed in outdoor unit only when all the indoor units are in trouble. However, if one or more indoor units are
operating normally, outdoor unit shows only LED display without undergoing stop.
Note : 3 Operation mode conforms to mode command by indoor unit. However, when outdoor unit is in cooling operation, the
operation of indoor unit will be prohibited even by setting a part of indoor units under operation, or indoor unit under
stopping or fan mode to heating mode. Reversely when outdoor unit in heating operation, the same condition will be
commenced.
Start
Breaker
turned on
YES
Set indoor
address No. to
remote controller
NO
NO
Operation
command
YES
Fan
Operation
mode
Error mode
NO
52C ON
Operation
mode
Cooling opera-
Heating opera-
tions
tions
Operation mode command to indoor unit controller
NO
Note: 1
YES
2
Cooling, Heating
Note: 2
YES
Note: 3
-106-
Normal operations
Trouble observed
Stop
Error stop
Error code blinks on the
outdoor controller board
Error command to indoor
unit
Error code blinks on the
remote controller
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