Danfoss DHP-AQ Midi, DHP-AQ Maxi Service Instructions Manual
Service instructions
DHP-AQ
VMGFJ102
If these instructions are not followed during installation and
service, Danfoss A/Sliability according to 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 the original instructions. Other
languages are a translation of original instructions.
(Directive 2006/42/EG)
Contents
1 About documents and decals ...................................................... 3
1.1
Introduction .................................................................................... 3
1.2 Symbols in documents ................................................................ 3
1.3 Symbols on decals ........................................................................ 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 Alarm ................................................................................................. 9
3.2 Components ................................................................................. 10
3.3 Measurement points ................................................................. 11
3.4 Check points ................................................................................. 14
3.5 Operational problems ............................................................... 14
VMGFJ102 – 1
1 About documents and decals
1.1
Introduction
The following documents are available for this product:
•
Installation instructions containing information to install and commission a heat pump installation, and information about the heat pump’s function, accessories and technical data. Supplied with the heat pump on delivery.
•
Service instructions that contain information about fault tracing. The service instructions are available for
download as below.
•
The electrical instructions that contain the wiring diagram for the heat pump intended for fault tracing and
service. The electrical instructions are available for download as below.
•
The maintenance instructions must handed over and gone through with the end customer. Supplied with the
heat pump on delivery.
•
Country specific instructions and forms are available where relevant. Supplied with the heat pump on delivery.
•
Sheet with adhesive decals that will be used as translation for the existing English language type plates.
The Service instructions 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 with text, indicate to the user that there are
risks involved with actions to be taken.
The symbols are displayed to the left of the text and three different symbols are used to indicate the degree of
danger:
DANGER! Indicates an immediate danger that leads to fatal or serious injury if necessary measures are not
taken.
Warning! Risk of personal injury! Indicates a possible danger that can lead to fatal or serious injury if
necessary measures are not taken.
Caution! Risk of installation damage. Indicates a possible hazard that can lead to item damage if necessary
measures are not taken.
A fourth symbol is used to give practical information or tips on how to perform a procedure.
Note! Information regarding making the handling of the installation easier or a possible operational
technical disadvantage.
1.3 Symbols on decals
The following symbols can occur on decals on the different parts of the heat pump. Which symbols are used
depends on the heat pump model.
Service instructions VMGFJ102 – 3
Warning symbols
!
Warning, danger!
!
Read the documentation provided.
Read the documentation provided.
Warning, hazardous electrical voltage!
Warning, hot surfaces!
Warning, moving parts!
Warning, risk of crushing 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 Sensor hot-water top 366 Return line sensor
71 Flow sensor 406 Room sensor
304 Circulation pump 408 EVU
353 Drip tray 417 Defrost sensor
Example:
406
Room sensor
4 – Service instructions VMGFJ102
Pipe connections
Bleeding
Defrosting tank
Expansion tank with safety valve, brine
Brine
Temperature and pressure relief valve
Tap water
Outdoor unit
Water heater
Heating system
1.4 Terminology
Term Meaning
Heating system/Heat transfer fluid
circuit
The circuit that generates heat to the property or to the water heater.
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 direction from radiators/under floor heating
or water heater to the heat pump.
Circulation pump Circulation pump for heating system.
Refrigerant circuit The energy carrying circuit between the outdoor air and heating system.
Refrigerant The gas/liquid that circulates in the refrigerant circuit.
Service instructions VMGFJ102 – 5
2 Important information
2.1
General safety precautions
Warning! Risk of personal injury! Children are not permitted to play with the product.
Caution! The heat pump must be installed by authorised installation engineers and the installation must
follow the applicable local rules and regulations as well as these installation instructions.
Caution! This product is not intended for persons (including children) with reduced physical, sensory or
psychological capacity, or who do not have knowledge or experience, unless supervised or they have
received instructions on how the apparatus functions from a safety qualified person.
Caution! When cooling it is important to limit the lowest flow line temperature to prevent condensation.
2.2 Refrigerant
2.2.1
Fire risk
The refrigerant is not combustible or explosive in normal conditions.
2.2.2 Toxicity
In normal use and normal conditions the refrigerant has low toxicity. However, although the toxicity of the refrigerant is low, it can cause injury (or be highly dangerous) in abnormal circumstances or where deliberately abused.
Warning! Risk of personal injury! Spaces in which heavy vapour can collect below the level of the air must
be well ventilated.
Refrigerant vapour is heavier than air and, in enclosed spaces below the level of a door for example, and in the
event of leakage, concentrations can arise with a resultant risk of suffocation due to a lack of oxygen.
Warning! Risk of personal injury! Refrigerant exposed to a naked flame creates a poisonous irritating gas.
This gas can be detected by its odour even at concentrations below its permitted levels. Evacuate the area
until it has been sufficiently ventilated.
2.2.3 Work on the refrigerant circuit
Caution! Work on the refrigerant circuit must only be carried out by a certified engineer!
Caution! When repairing the refrigerant circuit, the refrigerant must not be released from the heat pump it must dealt with in the appropriate way.
6 – Service instructions VMGFJ102
Refilling must only be carried out using new refrigerant (for the amount and type of refrigerant see manufacturer’s
plate) through the service valves.
Caution! All warranties from Danfoss are void if, when filling with refrigerant other than Danfoss A/S
specified refrigerant, if there has not been written notification that the new refrigerant is an approved
replacement refrigerant together with other remedies.
2.2.4 Scrapping
Caution! When the heat pump is to be scrapped the refrigerant must be extracted for disposal. Local rules
and regulations related to the disposal of refrigerant must be followed.
2.3 Electrical connection
DANGER! Hazardous electrical voltage! The terminal blocks are live and can be highly dangerous due to
the risk of electric shock. All power supplies must be isolated before electrical installation is started. The
heat pump is connected internally at the factory, for this reason electrical installation consists mainly of
the connection of the power supply.
Warning! Electrical installation may only be carried out by an authorised electrician and must follow
applicable local 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 with a minimum contact gap of 3
mm.
2.4 Important information
Caution! A normal heating system always contains a certain amount of corrosion particulates (rust) and
sludge products from calcium oxide. This comes from acid that is naturally occurring in the fresh water
that the system is filled with. It is not good practice to have to fill the heating system regularly which is
why any leakage in the heating system should be repaired immediately. Normal filling should occur only
once or twice a year. The water in the heating system should be as clean as possible, always position the
dirt filter on the return line from the heating system to the heat pump, as close to the heat pump as
possible.
Caution! Hard water; Normally it is not a problem installing a heat pump in areas with hard water because
the normal operating temperature for the hot water does not exceed 60°C. In areas where there are
exceptional prevailing conditions with the water one can install a softening filter, which softens the water,
cleans any impurities and prevents the build up of calcification.
Service instructions VMGFJ102 – 7
2.5 Commissioning
Caution! The installation may only be commissioned if the heating system is filled and bled. Otherwise the
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 compressor cannot be started. This is carried out by
setting the operating mode to AUX. HEATER.
8 – Service instructions VMGFJ102
3 Troubleshooting
3.1
Alarm
In event of alarm this is indicated in the display with the text ALARM and an alarm message, see following table.
For alarms that are not reset automatically acknowledgement is required. Acknowledge the alarm by setting the
heat pump to operating mode OFF and then back to the desired operating mode.
Message Meaning
MOTOR P COMP.ERROR The compressor motor protection has deployed.
MOTOR P FAN ERROR The fan motor protection has deployed.
EL. HEATER ERROR The electrical heater overheating protection has deployed.
HEAT / PRESSURE ERROR The expected pressure and temperature change in the refrigerant circuit has
not happened in the correct way at compressor start.
LOW PRESSURE ERROR Evaporation pressure has fallen too low.
LOW PRESSURE TRANSDUCER Fault in low pressure transmitter alternatively cable fault.
HIGH PRESSURE ERROR High pressure switch has deployed.
LOW HEAT CIR. FLOW The flow sensor has registered too low a flow.
MAX TEMP ELEC. HW Too high temperature in heat pump junction box/electrical cabinet.
NO. OF TRIES X/5
(where X=1…5)
Circulation pump is jammed. Start attempt made.
HEATING CIRC. PUMP Circulation pump is jammed.
HEATING SYSTEM PUMP Circulation pump is jammed.
OUTDOOR SENSOR Sensor fault alternatively cable fault.
DEFROST SENSOR Sensor fault alternatively cable fault. Defrost sensor.
SUPPLY LINE SENSOR Sensor fault alternatively cable fault. Supply line 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 Return line temperature too high
BUFFER TANK SENSOR Sensor fault alternatively cable fault.
HGW SENSOR Sensor fault alternatively cable fault.
HOT WATER SENSOR Sensor fault alternatively cable fault (the lower sensor, Start sensor).
HOT WATER TOP Sensor fault alternatively cable fault.
FAILSAFE MODE Sensor fault alternatively cable fault on one of the refrigerant sensors. The heat
pump goes to failsafe mode and defrosts on time.
REFR.1 SENSOR Sensor fault alternatively cable fault. Refrigerant sensor 1
REFR.2 SENSOR Sensor fault alternatively cable fault. Refrigerant sensor 2
LOW RETURN TEMP 1 The return line temperature is too low to start a defrosting.
LOW RETURN TEMP 2 The return line has fallen too low during defrosting.
LOW EVAP. TEMP 1 Evaporation temperature too low.
LOW EVAP. TEMP 2 Too great a deviation in evaporation temperature average value.
SUCTION TEMP SENSOR Sensor fault alternatively cable fault.
ROOM SENSOR Sensor fault alternatively cable fault.
DISCHARGE PIPE SENSOR Sensor fault alternatively cable fault.
DISTR. CIR. 1 SENSOR Sensor fault alternatively cable fault.
DISTR. CIR. 2 SENSOR Sensor fault alternatively cable fault.
POOL SENSOR Sensor fault alternatively cable fault.
COM. ERROR HP-CARD Communication broken between display card and heat pump card (outdoor).
COM. ERROR HUB-CARD Communication broken between display card and hub card (indoor).
Service instructions VMGFJ102 – 9
Message Meaning
COM. ERROR EXV-CARD Communication broken between display card and expansion valve control
card (outdoor).
COM. ERROR EXPANSION CARD Communication broken between display card and expansion card (indoor).
Note! In event of alarm 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.
3.2 Components
3.2.1 Outdoor unit
11
10
12
13
14
16
15
17
1
2
3
4
5
6
7
8
9
19
18
Figure 1. Components
Position Name Position Name
1 Electrical cabinet 11 Electronic expansion valve
2 Fan 12 Receiver
10 – Service instructions VMGFJ102
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