Sanyo CLM2472 Service Manual - Page 48

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< Low Ambient Cooling Operation > NOTE The following descriptions of low ambient cooling operation are applied only to CLM1972 and CLM2472 When the outdoor air temperature reaches 57.2 °F (14 °C ) or less during the cooling operation, the operation mode is switched to low ambient cooling operation. When the mode is switched from cooling opration to low ambient cooling operation, the compressor is stopped for 150 seconds temporarily. When the mode has been switched to low ambient cooling operation, the outdoor fan speed is lowered as the outdoor air temperature falls. Outdoor fan speed [ rpm ] 32 °F ( °C ) Outdoor air temperature When the outdoor air temperature reaches 62.6 °F (17 °C ) or more during the low ambient cooling operation, the operation mode is switched to cooling operation. The following protective actions are available to prevent the compressor from operating with abnormal loads. At that time, they initiate thermo-off ( stopping the outdoor unit ) of the air conditioner. Indoor unit : KMS0772 KMS0972 KMS1272 Outdoor air temp. °F ( °C ) 23 (-5) 19.4 (-7) Compressor ON Indoor fan OFF ON ON Indoor unit : KMS1872 KMS2472 Outdoor air temp. °F ( °C ) 32 (0) 28.4 (-2) Compressor ON Indoor fan OFF ON ON 48

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< Low Ambient Cooling Operation >
When the mode is switched from cooling opration to low ambient cooling operation,
the compressor is stopped for 150 seconds temporarily.
The following descriptions of low ambient cooling operation are applied only to
CLM1972 and CLM2472
Indoor unit : KMS0772
KMS0972
KMS1272
Indoor unit : KMS1872
KMS2472
Outdoor fan speed [ rpm ]
Outdoor air temperature
32 °F ( °C )
When the mode has been switched to low ambient cooling operation,
the outdoor fan speed is lowered as the outdoor air temperature falls.
When the outdoor air temperature reaches 57.2 °F (14 °C ) or less during the cooling operation,
the operation mode is switched to low ambient cooling operation.
The following protective actions are available to prevent the compressor from operating
with abnormal loads.
At that time, they initiate thermo-off ( stopping the outdoor unit ) of the air conditioner.
When the outdoor air temperature reaches 62.6 °F (17 °C ) or more during the low ambient
cooling operation, the operation mode is switched to cooling operation.
19.4 (-7)
23 (-5)
Compressor
Indoor fan
OFF
ON
ON
28.4 (-2)
32 (0)
Outdoor air temp.
°F ( °C )
Outdoor air temp.
°F ( °C )
Compressor
Indoor fan
OFF
ON
ON
ON
ON
NOTE
48