Low temperature protection during defrosting
Fault description
Cooling undercooling protection
Standby frost protection
Electric heating overheating protection
Press current protection
Code
P15
P16
P17
P18
P19
P23
Código
r19
r20
r21
r22
r23
r24
Fault description
Compressor rotor stuck
Partial PFC overcurrent protection
Partial PFC overvoltage protection
Partial PFC undercurrent protection
Partial PFC check AC voltage frequency error
Excessive tem perature difference between inlet
and outlet water
Compressor speed abnormal protection
2. The compressor does not start
When the compressor does not start, it may be due to the following reasons:
The machine is not turned on, please press the key to start the machine.
The water temperature has reached the set temperature, and the machine stops working. Wait for the
water temperature to change to a certain value and then restart the work automatically.
The machine is not enough for 3 minutes. Due to the compressor's own protection requirements, after
the shutdown, it is necessary to wait at least 3 minutes before restarting the compressor. This is a normal
protection measure.
The machine is in a fault or other protection state. For details, see the description in the table at point.
3. The fan is not running
When the fan does not start, it may be due to the following reasons:
The machine is not turned on, please press the key to start the machine.
If the water temperature has reached the set temperature or above, the machine stops heating. After the
water temperature drops, heating can be resumed automatically.
The machine is in a fault or other protection state. For details, see the description in the table at point 1.
6 Wiring diagrams.
6.1 Wire control interface diagram and denition
Please refer to wiring diagrams on the cover of electronic control box.
7 Maintenance and Inspection.
Check the water inlet and drainage often. The water and air inow into the system should be sufcient
so that its performance and reliability does not get compromised. You should clean the pool lter regularly
to avoid damage to the unit caused by clogging of the lter. • The area around the unit should be spacious
and well ventilated. Clean the sides of the heat pump regularly to maintain good heat exchange and to
save energy.
Check if all processes in the unit are operational and pay special attention to the operation pres- sure
of the refrigerant system.
Check the power supply and cable connections regularly. Should the unit begin to function abnormally
or should you notice a smell from an electrical component, arrange for timely repair or replacement.
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