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compressor
terminals without
power (electric
control panels no
voltage output)
lower than the water
temperature;
3:The electronic control
board is broken;
4: Transformer is
broken;
5: power outages
3: Alternative Method;
4: Alternative Method;
5: Measuring line voltage
3: Change electronic control
board is broken;
4: Change transformers;
5: Wait to restore power
Compressor does
not work, when
the type of
external overload
protection
1: Capacitors is broken;
2:External overload is
broken
1: Check the capacity of the
capacitor;
2: Measure the resistance protection
1: Change capacitor;
2: Change overload protection
Compressor does
not work, when
the type of inside
overload
protection
1: Too little refrigerant
2: Low voltage;
3:The compressor
cylinder block;
4:Compressor short of
engine oil
，
wide noise,
temperature rise quick;
1: measured pressure, current, water
temperature parameter;
2: Measuring Voltage;
3: measuring pressure, current, water
temperature parameter;
4: Listen to the noise, measured
compressor temperature
1: Charging refrigerant;
2: Transform line or increase
Regulators;
3: parallel capacitance rushed to
open, add frozen oil;
4: add frozen oil
Unit does not
defrost,
defrost effect poor
1:Defrost temperature
sensor fault;
2:Defrost temperature
sensor loose;
3:Defrost temperature
sensor is installed at no
frost place;
4: Defrost detection
takes too long time;
5:Defrost condition
setting inappropriate;
6:Four-way valve does
not operate the
four-way valve coil is
broken;
7:Four-way valve does
not operate the
four-way valve stuck;
8:4-way valve gas
carry-over;
9:The electronic control
board is broken
1: Check the defrosting sensor
connection;
2: Check the defrosting sensor
connection;
3: Inspection;
4: Check of frost detection time;
5: Defrost temperature set point is
too high;
6: Measuring winding;
7: Knocking four-way valve;
8: Touch four-valve-pipe
temperature, measuring the current /
pressure and other parameters;
9: Forced defrost, to see whether the
electronic control board has electrical
output
1: Replace the sensor;
2: Replace the sensor;
3: Adjust the mounting position;
4: Reset the time;
5: Adjust the temperature point;
6: Replace the coil;
7: Replacing the four-way valve;
8: Replace the four-way valve;
9: Replace the control board
