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8-4. Freeze Prevention (Cooling)
●
This function prevents freezing of the indoor heat exchange coil.
●
When the compressor has been running for 10 minutes or more and the temperature of the indoor heat
exchange coil falls below 30°F, the control circuit stops the compressor for at least 6 minutes. The compressor
does not start again until the temperature rises above 46°F or 6 minutes has elapsed.
8-5. Overload Prevention (Heating)
●
This function prevents overheating of the indoor heat exchange coil.
●
When the temperature of the indoor heat exchange coil rises above 139°F, and if the indoor fan is L (low
speed), then the fan speed changes from L (low speed) to M (medium speed).
●
When the temperature of the indoor heat exchange coil rises above 141°F, the outdoor fan stops.
ONON OFF
ON
H or M or L H ➞ H, M ➞ M, L ➞ M
141
139
126
120
Indoor heat
exch. coil
temp. ¡F
Outdoor fan
Indoor fan
Compressor
ON ON ON ON
OFFOFF
Set speed
More than
10 minutes
6 minutes
T + 4 ¡F
Indoor heat exch.
coil temp.
30 ¡F
Compressor
Indoor fan
Room temp.
Thermo. OFF
Thermo. ON
Set temp. T ¡F
More than
10 minutes
More than
6 minutes
Set speed
000-111 SM (18-68) 00.3.17 11:49 AM y[W 50