Overload Prevention - Sanyo SAP – K92AH Technical & Service Manual

8-6. Overload Prevention (Heating)
Overload prevention prevents overheating of the indoor heat exchange coil. This function works either when
the temperature of indoor heat exchange coil goes up or compressor current rises to a certain level.
Temperature of indoor heat exchange coil sensor
When the temperature of the indoor heat exchange coil rises above A2°C, 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 A1°C, the outdoor fan stops.
A1
A2
Indoor heat
exch. coil
temp. °C
A3
A4
Outdoor fan
Indoor fan
Compressor
Compressor current detection
When the compressor current rises above 6.5(A), and if the indoor fan is L (low speed), then the fan speed
changes from L (low speed) to M (medium speed). At the same time, the outdoor fan stops its operation.
When the compressor current drops to 4.4(A), the outdoor fan resumes its operation.
When the compressor current drops below 4.4(A), indoor fan returns to operate in set speed.
About
B1 (A)
Compressor
current (A)
About
B2 (A)
B3 (A)
Outdoor fan
Indoor fan
Compressor
ON
H or M or L H
ON
H or M or L H H, M
ON
OFF
H, M M, L M
ON
OFF ON
M, L M H or M or L
31
NOTE
The operation temperature shown
as A1, A2, A3 and A4 in the chart
left differ by models.
ON
SAP-K92AH
A1
A2
H or M or L
A3
A4
NOTE
The operation temperature shown
as B1, B2 and B3 in the chart left
differ by models. B2 and B3 are the
same value in these models.
SAP-K92AH
B1 6.5
B2 4.4
B3 4.4
SAP-K122AH
58 54
55 52
49 45
46 42
SAP-K122AH
9.5
6.5
6.5