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2. COOLING OPERATION
(1) Thermostat function
During cooling operation, desired temperature can be set in the range from 66˚F to 86°F. When room temperature falls to
the set temperature, the thermostat turns to OFF. After that, when the room temperature rises 2 deg. higher than the set tem-
perature, the thermostat turns ON.
(2) Coil frost prevention
After 16-minutes compressor continuous operation, if the indoor coil thermistor (RT2 or TH2) reads 34°F or below, the com-
pressor stops to prevent coil frosting. When the indoor coil temperature rises to 50°F, the coil frost prevention stops and the
compressor restarts after 3-minute time delay function.
❈
1
❈
1 After stop, the compressor does not restart for 3 minutes to prevent short cycle.
(3) Coil frost protection
1
After compressor continuous operation of at least 3 minutes, if the indoor coil temperature has been 5°F or below for 3
minutes, the coil frost protection mode starts.
2
The compressor stops, and restarts 6 minutes later. (6-minute time delay)
3
The first 10 minutes after the compressor restart is an allowance period.
●
If the same conditions as
1
is satisfied in the allowance period, both indoor and outdoor units stop and check code "P6"
appears on the liquid crystal display (LCD) of the remote controller.
●
If the same conditions as
1
is satisfied after the allowance period, 6-minute time delay functions and the allowance peri-
od starts again.
4
If the cooling mode stops or changes to other mode during 6-minute time delay or the allowance period, the coil frost pro-
tection mode is canceled.
(4) Outdoor unit abnormality detection
After 3-minute compressor continuous operation, if room temperature minus indoor coil temperature is less than 9 degrees
for 1 minute, the fan speed turns to LOW. Five minutes later, if the difference is still less than 9 degrees, the outdoor unit is
regarded as abnormal. Then the compressor stops and the check code "P8" appears on LCD of the remote controller.
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