Views: 1479 Author: Site Editor Publish Time: 2023-03-28 Origin: Site
| Causes and determination of faults in Carel DC Inverter Heat Pump | ||||
| Error Code | Description | Possible Causes | Measure to Judge | Solution |
| AL001 | AL001 Too many mem writings | Frequent parameter changes | Frequent parameter changes | Stop operating the controller or power off for 3 minutes |
| AL002 | AL002 Retain mem write error | Frequent parameter changes | Frequent parameter changes | Stop operating the controller or power off for 3 minutes |
| AL003 | AL003 Inlet probe error | Loose wire/Wire break/Broken probe | Visual inspection | Connect the wires tightly/ Reconnect the wire/ Replace the probe |
| AL004 | AL004 Outlet probe error | Loose wire/Wire break/Broken probe | Visual inspection | Connect the wires tightly/ Reconnect the wire/ Replace the probe |
| AL005 | AL005 Ambient probe error | Loose wire/Wire break/Broken probe | Visual inspection | Connect the wires tightly/ Reconnect the wire/ Replace the probe |
| AL006 | AL006 Condenser coil temp | Loose wire/Wire break/Broken probe | Visual inspection | Connect the wires tightly/ Reconnect the wire/ Replace the probe |
| AL007/AL137 | AL007 Water flow switch | Clogged filter, resulting in low flow rate | Low water flow | Clean filters |
| Air in pipes causing poor water flow | Low water flow | Evacuate pipeline and install automatic venting valve at the highest point of the system | ||
| Water pump is not emptied, resulting in low flow | Low water flow | Empty the water pump | ||
| Water system with valves closed or not fully open | Low water flow | Open the valve | ||
| Water pump is too small, resulting in low flow | Low water flow | Replace the water pump with a higher head flow rate | ||
| Water flow switch is broken | If the above are ruled out, you can short the water flow switch and force the machine on. If the water outlet temperature is greater than the tank temperature of 8 degrees or more, continue the above operation. Within 5 degrees and no fault in the start-up, the water flow switch is broken. | Replace the water flow switch | ||
| Water pump is broken | Water pump does not turn | Replace water pumps | ||
| AL008 | AL008 Phase sequ.prot.alarm | Parameter setting exceptions | Three-phase unit reports fault | Set DI5 on the Ot6 page inside M09 to Normally Open NO |
| AL013 | AL013 Low superheat - Vlv.A | Long-term operation of the unit at low frequencies outside its operating range | Long-term operation of the unit at a low frequency of 30Hz | Change the parameter of Alarm delay in the EEV n 1 page in M07 to 9999 |
| AL028 | AL028 Battery discharge EVD | Strong electrical interference with the unit | Report a fault | Power off for 3 minutes and then restart |
| AL037 | AL037 BLDC-alarm:Out of Envelope | Water temperature too high or ambient temperature too low | Ambient or water temperature outside the permitted range of the unit | Operates within the permitted operating range |
| AL038 | AL038 BLDC-alarm:Starting fail wait | Program error | Check if the program version is up to date | Brush up on the latest programsBrush up on the latest programs |
| AL039 | AL039 BLDC-alarm:Starting fail exceeded | Program error | Check if the program version is up to date | Brush up on the latest programsBrush up on the latest programs |
| AL041/AL050 | AL041 BLDC-alarm:High discarge gas temp | Lack of refrigerant | Low pressure is too low ausing high exhaust | Leak check and repair then evacuate and fill with refrigerant according to the nameplate |
| Exhaust probe not sensing correctly | Exhaust probe shows high or low even after shutdown | 更换排气探头 | ||
| AL051/AL057/AL082/ | AL051 Power+ alarm:01-Overcurrent | Low supply voltage | Voltage measured with multimeter in standby, 10% below rated voltage | Add a voltage regulator to keep the voltage stable, or provide a stable voltage, or thicken the power cable |
| Low voltage due to small wire diameter | When the compressor is started and the voltage is measured with a multimeter, the voltage will slowly become lower and the voltage shown on the multimeter will be more than 10% below the rated voltage | Replace suitable wire diameter | ||
| High current due to loose compressor or inverter wiring | Check if the power cable, compressor wiring, inverter inlet and outlet cables are loose and if there are burn marks | Re-crimpe wire joints | ||
| Compressor coils short-circuited | Exclude the above, measure the resistance between the three coil columns of the compressor two by two, there is a very small or large resistance, indicating that the compressor is bad | Replace Compressor | ||
| AL053 | AL053 Power+ alarm:03-DCbus overvoltage | Excessive voltage | Actual voltage exceeds the rated by more than 20% under the measurement | Provide stable supply voltage |
| AL054 | AL054 Power+ alarm:04-DCbus undervoltage | Voltage too low | The actual voltage is more than 25% below the rated voltage at the time of measurement | Provide stable supply voltage |
| AL114 | AL114 Power+ alarm:Power+ offline | Too short an interval between power-off and power-up of the main unit | Re-powering time less than 30 seconds | Power off again and power back on after 3 minutes, if still not possible then power off for 10 minutes |
| Loose inverter connection cable | Screws not tightened | Retighten | ||
| Inverter dipswitch in wrong position | The four dip switches of the inverter are not oriented in the same direction | Re-dial to Consistency | ||
| AL115 | AL115 EEV alarm:Low superheat | Long-term operation of the unit at low frequencies outside its operating range | Long-term operation of the unit at a low frequency of 30Hz | Change the parameter of Alarm delay in the EEV n 1 page in M07 to 9999 |
| AL128 | AL128 Low press alarm | Severe frosting of mainframe fins | The fins are covered in a very thick frost | Forced defrost, place the ambient probe as far away from the fins as possible to prevent it from being covered by snow and check for abnormal parameters |
| Insufficient airflow due to bad airfoil | Broken wind blades | Replace wind blade | ||
| Refrigerant leakage from the system | The low pressure is too low and oil leaks can be seen in the lines | Leak check and repair then evacuate and fill with refrigerant according to the nameplate | ||
| Low pressure pressure sensor is broken | Low pressure gauge over 1kg, still reporting low pressure alarm | Replace low pressure sensor | ||
| AL129 | AL129 High press alarm | Clogged filter, resulting in low flow | Difference in temperature between inlet and outlet water of more than 8 degrees | Clean filters |
| Air in the pipes, causing poor water flow | Difference in temperature between inlet and outlet water of more than 8 degrees | Evacuate pipeline and install automatic venting valve at the highest point of the system | ||
| Water pump not emptied, resulting in low flow | Difference in temperature between inlet and outlet water of more than 8 degrees | Empty the water pump | ||
| Water system with valves closed or not fully open | No or low water flow | Open the valve | ||
| The hot water probe or underfloor heating probe is not placed in the corresponding return pipe or blind pipe of the water tank | Very high water discharge temperature, over 60 degrees | Place the probe in the corresponding position | ||
| Pump head or flow rate too low, resulting in low flow rate | Difference in temperature between inlet and outlet water of more than 8 degrees | Replace the water pump with a higher head flow rate | ||
| High pressure due to water-side heat exchanger fouling | Low temperature difference between inlet and outlet water, high pressure | Cleaning of water-side heat exchanger with water treatment | ||
| High pressure due to air in the fluorine system | Jittering of the high pressure gauge needle | Re-vacuumine and refill with refrigerant | ||
| Bad high voltage sensor switch | Pressure gauge does not exceed maximum pressure, but still reports high pressure alarm | Replace the high-pressure pressure sensor | ||
| High pressure due to bad electronic expansion valve | Low pressure is too low, and high pressure is too high | Replace the electronic expansion valve | ||
| AL130 | AL130 Disc.temp.probe error | Loose wire/Wire break/Broken probe | Visual inspection | Connect the wires tightly/ Reconnect the wire/ Replace the probe |
| AL131 | AL131 Suct.temp.probe error | Loose wire/Wire break/Broken probe | Visual inspection | Connect the wires tightly/ Reconnect the wire/ Replace the probe |
| AL134 | AL134 Tank temp.probe error | Loose wire/Wire break/Broken probe | Visual inspection | Connect the wires tightly/ Reconnect the wire/ Replace the probe |
| AL138 | AL138 High temp. alarm | Clogged filter, resulting in low flow | Water outlet temperature above 62 degrees | Clean filters |
| Air in the pipes, causing poor water flow | Water outlet temperature above 62 degrees | Evacuate pipeline and install automatic venting valve at the highest point of the system | ||
| Water pump not emptied, resulting in low flow | Water outlet temperature above 62 degrees | Empty the water pump | ||
| Water system with valves not fully open | Water outlet temperature above 62 degrees | Open the valve | ||
| Set temperature too high and flow rate too low | Water outlet temperature above 62 degrees | Reduce the setting temperature | ||
| Water pump too small, resulting in low flow | Water outlet temperature above 62 degrees | Replace the water pump with a higher head flow rate | ||
| AL139 | AL139 Low temp. alarm | Clogged filter, resulting in low flow | Water outlet temperature below 5 degrees | Clean filters |
| Air in the pipes, causing poor water flow | Water outlet temperature below 5 degrees | Evacuate pipeline and install automatic venting valve at the highest point of the system | ||
| Water pump not emptied, resulting in low flow | Water outlet temperature below 5 degrees | Empty the water pump | ||
| Water system with valves not fully open | Water outlet temperature below 5 degrees | Open the valve | ||
| Set temperature too high and flow rate too low | Water outlet temperature below 5 degrees | Reduce the setting temperature | ||
| Water pump too small, resulting in low flow | Water outlet temperature below 5 degrees | Replace the water pump with a higher head flow rate | ||
| AL153/AL154 | AL153 Fan1/2 fault | Fan drive dipswitch anomaly | Visual inspection | Fan drive dipswitch to be redialed, top left, bottom right |
| Loose wind turbine wiring | Check that the fan power socket is tightly plugged in | Plug the fan connection socket firmly | ||
| Bad wind turbine drive | Visual inspection of the power light does not illuminate | Replace the fan drive | ||
| Broken motor | Manual rotation of the motor with jamming | Replace the motor | ||
| AL155 | AL155 Fans Offline | Fan drive dip switch abnormal | Visual inspection | Fan drive dipswitch to be redialed, top left, bottom right |
| Loose wind turbine wiring | Check that the fan power socket is tightly plugged in | Plug the fan connection socket firmly | ||
| Wind turbine drive is broken | Visual inspection of the power light does not illuminate | Replace the fan drive | ||
| Broken motor | Manual rotation of the motor with jamming | Replace the motor | ||
Abnormal Exclusion
| Serial Number | Abnormal State | Possible Causes | Measure to Judge | Treatment Measures |
| 1 | Unit does not operate | The machine is not switched on | Visual inspection | With hot water or heating symbols it is on |
| Loose linkage switch | Visual inspection | Short the linkage switch | ||
| The machine is faulty | Visual inspection | Troubleshooting | ||
| 2 | Difficult to close AC contactors | Voltage too low or wire diameter too small | Check the voltage with a multimeter and check the wire gauge | Add a voltage regulator to keep the voltage stable |
| 3 | Water pump running but water not circulating or noisy pump | Water system with air | Hands-on screening | Water system air discharge |
| Water system valves not fully opened | Visual inspection | Open the valve | ||
| Filters are dirty and clogged | Hands-on screening | Clean filters | ||
| 4 | The room is not heated | High heat dissipation in a room with a lot of glass leads to an undersized machine configuration | Visual inspection | Increased configuration |
| The room is slow to heat up with humidity | The new house is rather damp | Waiting for the room to dry | ||
| The room heats up slowly at first | Wait long enough for the room temperature to rise | |||
| Wet weather, resulting in frequent frost defrosting | Wait long enough for the room temperature to rise | |||
| 5 | The compressor runs but the unit does not produce heat | Refrigerant leaks | Leak check and repair then evacuate and fill with refrigerant according to the nameplate | |
| Compressor damage | Leak check and repair then evacuate and fill with refrigerant according to the nameplate | |||
| Stuck four-way valve | Tap on the four-way valve body | |||
| 6 | Defrost is not clean or does not go into defrost | Coil probe dislodged | Place the coil probe into the probe clamp | |
| Ambient probe covered in frost | Position the environmental probe on the fins as far away from the fins as possible | |||
| M10 inside the defrost ssetting parameters are inaccurate,so the unit can not enter the defrost. The defrost conditions: 1 coil B9 temperature is lower than the M10 inside the Df04 page set value (default -1 degrees), 2 ambient temperature B3 minus the coil temperature B9 is greater than or equal to the set parameters M10 inside the Df05 page set value (default is 5), 3 ambient temperature B3 is less than or equal to the M10 inside the Df04 page set value (default 15 degrees), 4 defrost interval time reached (default 45 minutes) | Firstly, check the defrost parameter settings. If the parameters are correct, check whether the four entry conditions are met during normal operation of the unit. Then, adjust the parameters that are not met and allow the unit to enter the defrost. After defrosting, then make targeted adjustments. |
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