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[2] Operation Flow Chart
(1) Outdoor unit (Cooling, heating modes)
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 being under 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 is being heating operation, the same condition will be
commenced.
"HO" blinks on remote controller
temperature display
Start
Breaker
turned on
Set indoor ad-
dress No. to remote
controller
Operation
command
Operation
mode
52C ON
Operation
mode
Protection function
self-holding
Outdoor unit LED
trouble display
Cooling
operations
Heating
operations
Operation mode command to indoor unit controller
1. 52C OFF
2. Inverter output 0Hz
3. Fan stop
4. All solenoid valve OFF
Normal operations
Trouble observed
Stop
Note: 3
Note: 2
Note: 1
1. Protection function self-
holding cancelled
2. Oil return LEV, SC coil LEV
fully closed
Fan
Cooling, Heating
Error mode
Error stop
Error command to
indoor unit
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