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2. Coil frost prevention
Coil frost prevention is as same as COOL mode. (3-8.2.)
3-10. DRY OPERATION
1. Thermostat control
Thermostat is ON or OFF by the difference between room temperature and set temperature.
ON -1°C or more
OFF less than -1°C
-1
°C
-0.7
°C
Room temperature minus
set temperature (During operation)
Room temperature minus
set temperature (Initial)
Thermostat
3-9. COOL OPERATION
2. Coil frost prevention
The the compressor operational frequency is controlled to prevent the indoor heat exchanger temperature from falling
excessively.
Compressor is turned OFF for 5 minutes when the temperature of indoor coil thermistor continues 3°C or less for 5 min-
utes or more.
1. Thermostat control
Thermostat is ON or OFF by the difference between room temperature and set temperature.
ON -1°C or more
OFF less than -1°C
-1°C
-0.7°C
Room temperature minus
set temperature (During operation)
Room temperature minus
set temperature (Initial)
Thermostat
3-8. PRE-HEAT CONTROL
The compressor is energized even while it is not operating.
This is to generate heat at the winding to improve the compressor's start-up condition.
NOTE:
When the unit is started with the remote controller, pre-heat control is turned OFF.
Compressor uses 50 W when pre-heat control is turned ON.
1. Pre-heat control is turned ON for 15 or 30 minutes after the breaker is turned ON.
2. 30 minutes after the unit is stopped, pre-heat control is turned ON for 15 or 30 minutes and turned OFF for 30 minutes.
This is repeated as shown in the graph until the breaker is turned OFF.
When the defrost thermistor reads less than 21°C, pre-heat control is ON for 30 minutes.
When the defrost thermistor reads 21°C or more, pre-heat control is ON for 15 minutes.
Power
ON
OFF
Compressor
ON
OFF
Defrost thermistor
30 minutes
30 minutes
30 minutes
30 minutes
30 minutes
30 minutes
15
minutes
15
minutes
30minutes
30minutes
Pre-heat
ON
OFF
Breaker ON
21°C
Stop
operation
Start
operation
When the defrost
thermistor reads
21°C or more
