one. Temperature Control Function
In temperature control function, the operation frequency of outdoor unit is determined based on room
temperature and the set temperature.
In automatic fan speed mode, indoor fan is controlled based on the need of temperature control
In heating mode, indoor fan is controlled based on the temperature of coil.
1-1-1.Specification of Indoor Ambient Temperature Sensor
In case of short circuit or open circuit, indicator lamp alarms and indoor fan stops. When normal condition is resumed,
fan will automatically restart and operate normally.
Short Circuit:
Temperature: over 126
o
C, Hexadecimal System: over F8H, Resistance: below 0.65K,Voltage: over 4.85V.
Normal Temperature:
Temperature: 25
o
C, Hexadecimal System: 40H, Resistance: 23K, Voltage: 2.33V.
Open Circuit:
Temperature: below -31
o
C, Hexadecimal System: below 08H, Resistance: below 620K Voltage: below
0.15V.
B Parameter = 4200 R (25
o
C) = 23K
1-1-2 Specification of Indoor Coil Temperature Sensor
B Constant Number = 3700 R (25
o
C) = 10K¡
1-1-3 When heating operation starts and indoor fan stops or when within 30s of indoor fan starts after
heating operation starts, the resistant of indoor ambient temperature sensor is ignored. (to avoid the
impact of heat exchanger temperature over it.)
When forced operation ends after start-up, temperature zone control begins.
1-3. Set Temperature Correction
Set temperature is corrected according to unit model, operation mode, fan speed and whether it is in
power operation.
Fan speed correction is available only during low and mid heating operation.
1-4. Temperature Zone Control
1-4-1.Error
Temperature zone error is calculated as per the following formula
:
In Heating Mode: E = (Remote Control Set Temperature + Correction Value) – Indoor Temperature
In Cooling & Dehumidification Mode: E = Indoor Temperature - (Remote Control Set Temperature +
Correction Value)
1-4-2 Compressor Shutdown
E is negative and |E|>T
Heating Cooling
T TCHAHL 0.67 TCHACL 0.33
After change of T TCHAHH 0.67 TCHACH 1
T Change Condition When operation starts E ı 3.0ć,
Compressor shuts down after continuous testing for 120s,
At the beginning of operation, with reference to the conditions given in above table, it operates based
on the parameters after change of T until compressor shuts down for the first time. In the time period
between compressor shutdown and restart, it operates based on T. (except in dehumidification mode)
Compressor starts at the beginning of operation or upon switch of operation mode (except standby ends)
or when E (error) > -T.
When compressor is operating, remote control set temperature is changing towards the direction of
compressor shutdown and when it is below –T, compressor will shut down.
2-4-3. Compressor Operation
Compressor restarts when E (error) > -ƸT+0.67ć and when 3 mins standby is over.
Domestic Air Conditioner
Model: H2SM-14HC03/R2
H2SM-18HC03/R2
24
15
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