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3.3.2 Positioning sensors

Heat pump DHP-AQ Midi DHP-AQ Maxi

Symbol explanation

1 DISCHARGE PIPE SENSOR

2 SUCTION TEMP SENSOR

3 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 SENSOR - Located on return pipe that runs to heat pump. See system solution in the Installa-

tion instructions.

Service instructions VMGFJ102 – 13

Contents3
About Documents and Decals5
Introduction5
Symbols in Documents5
Symbols on Decals5
Electrical Components6
Pipe Connections7
Terminology7
Important Information8
General Safety Precautions8
Refrigerant8
Work on the Refrigerant Circuit8
Electrical Connection9
Scrapping9
Commissioning10
Troubleshooting11
Alarm11
Components12
Outdoor Unit12
Indoor Unit13
Measurement Points13
DHP-AQ Mini13
DHP-AQ MIDI13
Measurement Checking Sensors During Fault Tracing14
Outdoor / Defrost Sensor14
PT1000 Sensor14
Other Sensors14
Positioning Sensors15
Heat Pump15
DHP-AQ Maxi15
Check Points16
Temperatures16
Break Pressure Switch/Pressure Transmitter16
Operational Problems16
Problem – Alarm LP (Lower Pressure Transmitter)17
Problem – Alarm HP (High Pressure Switch)17
Problem – Alarm MS (Motor Protection)19
Problem – Alarm Sensor (All)20
Problem – Err Phase Seq.20
Problem – Alarm Electric Heater Error21
Problem – Alarm Circulation Pump21
Leakage22
Problem – Leak Fluid Side22
Noise23
Problem – Noise Problem in the Radiator System23
Problem – Loud Compressor Noise24
Problem – Shrieking, Whistling Noise24
Problem – Noise – Miscellaneous24
Hot-Water25
Problem – Temperature And/Or Quantity25
Heating Comfort26
Problem – too Cold26
Problem – too Hot28
Problem – Irregular Indoor Temperature29
Problem – the Heat Pump Runs and Runs but Never Stops30
Problem – Runs on Electric Heating Element30
The Auxiliary Heater Is in Operation but Not the Compressor31
Problem – the Heat Pump Consumes too Much Energy33
Problem – Auxiliary Heater Cuts in too Soon35
Problem – Short Operating Times Despite Heating Demand35
Problem – Connection of External AH35
Problem – Noise/Loud Noise36
Problem – Defrosting Problems36
Problem – Build-Up of Ice under and Around the Outdoor Unit36

Brand	Danfoss
Model	DHP-AQ Mini
Category	Heat Pump
Language	English

Danfoss DHP-AQ Mini User Manual

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Danfoss DHP-AQ Mini Specifications

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