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CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG
9.2.4.
Abnormal Wiring or Piping Connection Checking Control
1. Objective
To check for Abnormal Wiring or Piping connections during a cooling operation after the air conditioner has been installed.
2. Detection subjects
Heat exchanger temperature of indoor unit which is not operating, and outdoor unit gas pipe temperature
3. Condition of control
· The compressor is turned ON by the forced cooling operation after the power was turned on
· After compressor started 3 minutes, the gas pipe temperature of the non-operated indoor unit dropped by more than 5 °C
· The outdoor air temperature is more than 5 °C
· A non-operated unit is present
When above conditions are satisfied all, the timer lamp blinks. (H41 error)
9.2.5.
Pump Down Control (Forced Cooling Operation)
· By shorting the "CN-S" terminals on the outdoor unit P.C. Board, the
air conditioner can be made to operate in the cooling mode regardless
of what is designated by the indoor unit.
* If the shorting of the terminals is released, the compressor is
stopped immediately. Three minutes later, it is operated
according to designation of indoor unit.
Minimum frequency operation protection
· When the compressor operates at less than 30Hz for 60
minutes, the operating frequency will increase to 35Hz for 4
minutes.
45
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