4. freeze prevention (cooling), 5. overload prevention (heating) – Sanyo CH1852 User Manual
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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.
ON
ON
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
OFF
OFF
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
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AM
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