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ABBREVIATION
Ts: Setting Temperature
Tr: Room Temperature
Td: Defrost sensor temperature
OPERATION OF MAIN BOARD
COOL MODE
If Tr > Ts, cool operation is activated. Compressor is turned on and the fan runs at the
setting speed.
If Tr Ts-1 cool operation is terminated. Compressor and fan are turned off.
The range of Ts is 16-31
Fan speed can be adjusted for low, medium, high and auto. Compressor will be delayed
by 3 minutes before its operation/termination.
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ANTI-ICING OPERATION
This process is checked by the defrost sensor.
If Td (defrost sensor temperature) =2 ,the fan runs at a high speed.
If Td 8 for 5 minutes continuously, compressor resumes to normal operation.
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If Td -1 for 1 minute continuously, compressor is turned off and the fan keeps running
at a high speed.
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CONTROL SPECIFICATIONS
1
At Electrical Heat mode, the compressor does not operate; If Tr<Ts, electrical heat
operation is activated after 8 seconds running of fan. If Tr>Ts, electrical heat
operation is terminated and the fan keeps the condition of anti-coldness.
While shutting off in Electrical Heat mode, the fan will be delayed 18 seconds to stop.
While shutting off in COOL mode and DRY mode with the operation of compressor,
the fan will be delayed 18 seconds to stop.
ELECTRICAL HEAT MODE
AUTO CHANGEOVER MODE(Only for remote controller operation)
If Tr>25 , cool operation is activated and Ts=24
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If 23 <Tr
25 , dry operation is activated and Ts=Tr-2
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For electrical heat pump type,If Tr<23 , electrical heat operation is activatedand Ts=26
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For cool only type, If Tr<23 , fan operation is activated and Ts=24
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DRY MODE
If Tr
15 , dry operation is activated. Compressor and fan start alternately.
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If Tr
23 , compressor and fan are operating in sequence as follows:
See A of fig1 If Tr<23 ,compressor and fan are operating in sequence
as follows: see B of Fig.1.
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Tr
23
Tr 23
<
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C
FAN
8mins 3mins
4mins
1min
2mins 3mins
8mins
1min
2mins 4mins
1min 1min
COMPRESSOR
Fig.1
A
B
3
