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Si20-701_B
Troubleshooting by Remote Controller
476
Cooling
Adequate level
Compressor frequency
increases in order to
maintain low pressure.
Compressor frequency
decreases in order to
maintain high pressure.
Maximum frequency
Suction superheated degree is approx. 0 deg.
(Degree of excessive refrigerant charging)
As compressor
frequency decreases,
low pressure rises.
As compressor
frequency decreases,
low pressure rises.
Compressor frequency
decreases due to high
pressure protection control
Minimum frequency
Minimum frequency
Electronic expansion valve
opening degree decreases
due to wet protection control
Electronic expansion valve
opening degree decreases
due to wet protection control
Minimum opening degree
Excessive charge
Adequate
level
Suction superheated degree is approx. 0 deg.
(Degree of excessive refrigerant charging)
Minimum opening degree
Excessive charge
Heating
High
pressure
Low
pressure
Compressor
frequency
Electronic
expansion
valve
Suction
superheated
degree
Discharge
superheated
degree
High
pressure
Low
pressure
Compressor
frequency
Electronic
expansion
valve
Suction
superheated
degree
Discharge
superheated
degree