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Les langues disponibles
Fault code
Panel description
Detail description
AL054 Power+ alarm:04-
AL054
Power+04-DCbus undervoltag
DCbus undervoltage
AL114 Power+ alarm:Power+
AL114
Inverter offline alarm
offline
AL115 EEV alarm:Low
AL115
EEV low superheat alarm
superheat
AL128
AL128 Low press alarm
Low pressure alarm
AL129
AL129 High press alarm
High voltage alarm
AL130
AL130 Disc.temp.probe error
Discharge gas temp. probe failure
AL131
AL131 Suct.temp.probe error
Suction gas temp. probe failure
AL134
AL134 Tank temp.probe error
Water tank probe failure
AL138
AL138 High temp. alarm
Too high outlet water temperature protection
AL139
AL139 Low temp. alarm
Too low outlet water temperature protection
Annex "B"
Possible cause
Diagnostics method
The actual voltage is lower than the rated voltage
Voltage is too low
by more than 25%
1. The interval between power-off and power-
Power cycle time is less than 30 seconds
on of the host is too short
2. The inverter cable is loose
Check is screw is tight, if not
3. The position of the inverter dial switch
The directions of the four DIP switches of the
is wrong
inverter are inconsistent
The unit has heavy frost
Visually check for frost
The unit has been operating at low
Check unit's running frequency
1. Heavy frost on the evaporator
The evaporator are covered with thick frost
2. The fan motor or fan blades are broken or
The fan rotates very slowly or stops rotating
the speed is slow, resulting in insufficient air
The low pressure is very low, and traces of oil
3. System leakage of refrigerant
leakage can be seen in the pipeline
If the low pressure meter exceeds 1kg, this
4. The low pressure switch is broken
fault is still reported
5. Reverse connection of high and low voltage
Low pressure gauge pressure is higher than 1kg,
switches
but high pressure gauge is very high
1. The filter is blocked, resulting in a small
The temperature difference between the inlet and
water flow
outlet water is more than 8 degrees
2. Water head and water flow of the waterpump
The temperature difference between the inlet and
are too small, resulting in
outlet water is more than 8 degrees
small water flow
3. The water pump is not empty, resulting
The temperature difference between the inlet
in a small water flow
and outlet water is more than 8 degrees
4. There is air in the pipeline, which leads to
The temperature difference between the inlet
poor water flow
and outlet water is more than 8 degrees
5. Air in the fluorine circuit system causes
The pointer of the high-voltage meter jitters
6. The electronic expansion valve is broken,
Low pressure is low and high pressure is high
resulting too high pressure
7. Fouling of the water side heat exchanger
Small temperature difference between inlet
causes high pressure
and outlet water, high pressure
8. The high pressure switch is broken
If the pressure of the pressure gauge does
9. The hot water probe or space
The outlet water temperature is very high, above
heating/cooling probes are not placed in their
60 degrees Celcius
corresponding thermal wells
1. Loose wire / broken wire / broken probe
Visual inspection
1. Loose wire / broken wire / broken probe
Visual inspection
1. Loose wire / broken wire / broken probe
Visual inspection
1. Strainer is blocked, resulting in a small water
The outlet water temperature is higher than 62
flow
degrees Celcius
2. The water pump is too small, resulting
The outlet water temperature is higher than 62
in low water flow
degrees Celcius
3. The water pump is not empty, resulting
The outlet water temperature is higher than 62
in a small water flow
degrees Celcius
4. There is air in the pipeline, which leads
The outlet water temperature is higher than 62
to poor water flow
degrees
5. The setting temperature is too high
The outlet water temperature is higher than 62
and the water flow is too small
degrees
1. Strainer is blocked, resulting in increased
The outlet water temperature is below 5 degrees
friction loss and a smaller water flow
Celcius
2. The water pump is too small, resulting
The outlet water temperature is below 5 degrees
in low water flow
Celcius
Page 2 of 3
Heat Pump Troubleshooting Schedule
What to do?
Provide stable power supply voltage
Power off again, and power on after 3 minutes, if it still doesn't work, power off for 10 minutes
Re-tighten
Redial to match
Lower the coil temperature difference on the
Df05 page in M10
Operate within the allowable operating range
Force defrost, keep the ambient temp. probe as far away as possible from the evaporator to
prevent it from being covered by snow, and
check whether the parameters are abnormal
If the fan motor or fan blade is broken, replace the motor or fan blade, if the speed is slow,
replace the fan capacitor
Check and fix the leaks, then vacuum and fill with refrigerant according to the nameplate
Replace low voltage switch
Change the wiring of the high and low voltage switch and check according to the high voltage
protection
Cleaning the filter
Replace the water pump with a larger water head and water flow
Emptying and water pump
Install an automatic air vent at the
highest point of the piping system
Re-Vacuum Refrigerant Lines and Re-charge system with refrigerant
Replace electronic expansion valve
Clean the water side heat exchanger and add
water for treatment
Replace the high pressure switch
Place each probe in its thermal well
Tighten the wire/reconnect the wire/replace the probe
Tighten the wire/reconnect the wire/replace the probe
Tighten the wire/reconnect the wire/replace the probe
Clean the Strainer
Replace the water pump with a larger water
head and water flow
Purge Water Pump
Install an automatic air vent at the
highest point of the piping system
Decrease temperature setpoint
Clean the Strainer
Replace the water pump with a larger water
head and water flow
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