Danfoss DHP-AQ Mini User Manual Download

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Service instructions

DHP-AQ

VMGFJ102

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Summary of Contents for DHP-AQ Mini

Page 1: ...Service instructions DHP AQ VMGFJ102...

Page 2: ...the applicable warranty is not binding Danfoss A S retains the right to make changes to components and specifications without prior notice 2011 Copyright Danfoss A S The Swedish language is used for t...

Page 3: ...3 1 4 Terminology 5 2 Important information 6 2 1 General safety precautions 6 2 2 Refrigerant 6 2 3 Electrical connection 7 2 4 Important information 7 2 5 Commissioning 8 3 Troubleshooting 9 3 1 Ala...

Page 4: ......

Page 5: ...uctions and Electrical instructions are available for download here www documentation heatpump danfoss com 1 2 Symbols in documents The instructions contain different warning symbols which together wi...

Page 6: ...rushing injury Electrical components Component normal Component accessory 3 Outdoor unit 362 Shunt valve 50 Outdoor sensor 363 Exchange valve hot water 54 Hot water sensor 365 Supply line sensor 55 Se...

Page 7: ...ter Supply line The heating system s supply line with flow direction from the heat pump to radiators under floor heating or water heater Return line The heating system s return line with flow directio...

Page 8: ...efrigerant has low toxicity However although the toxicity of the refrig erant is low it can cause injury or be highly dangerous in abnormal circumstances or where deliberately abused Warning Risk of p...

Page 9: ...l and national regulations Warning The electrical installation must be carried out using permanently routed cables It must be possible to isolate the power supply using a multi pole circuit breaker wi...

Page 10: ...he circulation pump can be damaged Caution If the installation is only to operate using an auxiliary heater during the installation ensure that the heating system is filled and bled and that the compr...

Page 11: ...sensor SYSTEM SUPPLY LINE SENSOR Sensor fault alternatively cable fault System supply line sensor RETURN LINE SENSOR Sensor fault alternatively cable fault Return line sensor HIGH RETURN LINE TEMP Re...

Page 12: ...m the heat pump will if possible supply heating to the house primarily with the compressor secondarily with the auxiliary heater Hot water will stop to indicate that something noteworthy has occurred...

Page 13: ...e 18 Solenoid 9 Discharge pipe 19 Non return valve 10 Air heat exchanger 3 2 2 Indoor unit 1 DHP AQ Mini 1 2 4 3 5 DHP AQ Maxi 1 2 3 4 DHP AQ Midi Position Description 1 Control module transparent in...

Page 14: ...66 3 5 52 4 10 41 8 15 33 5 20 27 1 25 22 0 30 18 0 35 14 8 40 12 2 45 10 1 50 8 5 55 7 1 60 6 0 65 5 0 70 4 2 75 3 7 80 3 1 85 2 7 3 3 1 Measurement checking sensors during fault tracing 1 Disconnect...

Page 15: ...REFR 1 SENSOR 4 REFR 2 SENSOR 5 DEFROST SENSOR located to rear beside air intake 6 OUTDOOR SENSOR positioned on wall to north 7 SUPPLY LINE SENSOR 8 HOT WATER TOP 9 HOT WATER SENSOR RETURN LINE SENSO...

Page 16: ...operation the heat pump operates with superheating of 5 5 C 7 C the expansion valve s degree of opening will vary depending on operating situation At outdoor temperatures of 5 C or lower the opening...

Page 17: ...Using manometer apparatus and ther mometer check that the unit s overheat ing is correct for the specific refrigerant If the evaporator is thought to be blocked by oil for example try blowing nitroge...

Page 18: ...h always open If the high pressure switch opens too soon or is always open replace it 9 External system shunt that closes on time setting Check for shunts or valves in the system which are timer contr...

Page 19: ...nd ing on type of refrigerant to add the cor rect amount of refrigerant If there appears to be a leak in the refrig erant circuit carry out leak tracing and any necessary corrective action Table 8 Pro...

Page 20: ...t take a reading from the sensor including cable and check against the ohm table in Symbols on decals If the read off value does not corre spond with the table only measure the sensor and check the oh...

Page 21: ...sor is defective replace it 5 No or insufficient circulation in the heating system Check That the circulation pump spins That the shut off valves are open That the strainer is not blocked That there i...

Page 22: ...maximum temperature of the discharge pipe 140 C 4 Lack of refrigerant not enough refrigerant in the system Using manometer apparatus and ther mometer check that the unit s overheat ing is correct for...

Page 23: ...ing to the instructions Install flexible hoses according to the instructions 3 Installing suspending pipes Check if vibrations are transmitted via one of the pipe mountings in the installation Remove...

Page 24: ...and output phases for the soft starter as well as the control signals from the heat pump card see wiring diagram If the soft starter is defective replace it 2 The compressor s safety valve opens The...

Page 25: ...it a plausible actual value Measure the resistance of the sensor check against the ohm table in Measure ment points Page 11 If the sensor is defective replace it 6 Large drain flow 12 l min Check how...

Page 26: ...duce the hot water When done read off the temperature on the top sensor and on the start sensor The top sensor should show a tempera ture of around 50 55 C and the start sensor around 45 48 C If after...

Page 27: ...y HYSTERE SIS before INTEGRAL reaches 0 there may be heating deficit in the house Check if heat production stops because the hysteresis value is set too low See the installation instructions for facto...

Page 28: ...water demand If the heat pump has been dimen sioned for a certain demand and this demand is increased the heat pump might not be able to main tain the desired room temperature If hot water consumption...

Page 29: ...es Check the ROOM and CURVE MIN MAX CURVE5 CURVE0 CURVE 5 and HEAT STOP settings Adjust incorrect values in the heat pump s control computer ROOM Desired indoor temperature CURVE Should be set so that...

Page 30: ...ted leak and look for bub bles Also check for oil as this can come out from the refrigerant circuit Table 24 Problem Runs on electric heating element Cause Troubleshooting Remedy 1 Operating mode AUX...

Page 31: ...sor runs back wards If the phases are in the incorrect order switch two incoming phases at the main terminal block and recheck according to the troubleshooting window 7 Changed conditions Have you inc...

Page 32: ...n sor is defective replace it If the delivery line temperature gets so hot that the compressor stops start by leak tracing the unit Rectify the leak if a leak is found If no leak is found try draining...

Page 33: ...d be increased there might be a reason why the interval has been changed 6 The heat pump has stopped on HIGH RETURN Check what the MAX RETURN value is set at in the heat pump s control com puter It mu...

Page 34: ...delivery line temperature is If the prob lem persists replace the compressor 9 Expansion valve defective or incor rectly set Using manometer apparatus and ther mometer check what the overheating read...

Page 35: ...racing and any necessary corrective action If leak tracer is not available brush soap water on the suspected leak and look for bub bles Also check for oil as this can come out from the refrigerant cir...

Page 36: ...instructions and that it is correctly calibrated Calibrate if necessary Table 32 Problem Build up of ice under and around the outdoor unit Cause Troubleshooting Remedy Insufficient drainage Does a lo...

Page 37: ...VMGFJ102...

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