Service manual

Room Air Conditioner 28
Operation
Auto restarting operation
Forced operation
• When the power is restarted after a sudden power failure while in appliance operation, the mode before the
power failure is kept on the memory and the appliance automatically operates in the mode on the memory.
• Operation mode that is kept on the memory
- State of operation ON/OFF
- Operation mode/setting temp./selected airflow speed
- Sleep timer mode/remaining time of sleep timer
- Chaos Swing
• To operate the appliance by force in case that the remote control is lost, the forced operation selection switch
is on the main unit of the appliance to operate the appliance in the standard conditions.
• The operation condition is set according to the outdoor temp. and intake air temperature as follows.
The unit select before operating mode in 3 hours.
Indoor temp.
over 24°C
21~24°C
below 21°C
Setting temp.
25°C
18°C
Setting speed of
indoor fan
High speed
Operating Mode
Cooling
FAN
Heating
CT1 control
• If the operating current reaches 13A, the operating frequency of the compressor stop insteally.
• After stoping 3min, the compressor will operate again.
CT2 control
• If the operating current of the appliance reaches I2A, the compressor will keep the frequence.
the current less than 12A.
• If the operating current of the appliance reaches 12.5A, the compressor's frequence will dearease, until
Protection from total current control
DC Peak Current Error by a fault signal of IPM
• If the operating current of IPM reaches 27A, the compressor stop instantly.
• If DC PEAK occurs 5 times within 1 hour, the appliance turns off and display ERROR CODE H5.
DC Peak Current Error by the compressor lock
• If the DC LINK voltage below DC 140V occurs 5 times within 1 hour while the compressor is operating, the
appliance turns off and display ERROR CODE H5.
DC Peak Current Error by the Outdoor Fan Lock
• If it’s 5 times within 1 hour in case of the temperature of outdoor pipe TH is over 65°C while the compressor is
operating, the appliance turns off and display ERROR CODE E4.
Protection from DC Peak Current