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Grundig Värmepump GHP MM14

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Service Manual

Heat Pump Monobloc Inverter

Please read this user manual first!

Dear Valued Customer,

Thank you for preferring this Grundig appliance. We hope that you get the best results

from your appliance which has been manufactured with high quality and state-of-the-art

technology. For this reason, please read this entire user manual and all other accompany-

ing documents carefully before using the appliance and keep it as a reference for future

use. If you handover the appliance to someone else, give the user manual as well. Follow

the instructions by paying attention to all the information and warnings in the user manual.

Remember that this user manual may also apply to other models. Differences between

models are explicitly described in the manual.

Meanings of the Symbols

Following symbols are used in various sections of this user manual:

CImportant information or useful hints

about usage.

AWarning for hazardous situations with

regard to life and property.

Warning to actions that must never

perform.

BWarning for electric shock.

Warning for hot surfaces.

Do not cover it.

This symbol shows that the operation

manual should be read carefully.

This symbol shows that a service per-

sonnel should be handling this equip-

ment with reference to the installation

manual.

(For R32/R290 gas type)

This symbol shows

that this appliance

used a flammable

refrigerant. If the ref-

rigerant is leaked and

exposed to an external

ignition source, there is

a risk of fire.

3 / EN

Heat Pump Monobloc Inverter / User Manual

TableofContents

Part 1 General Features .............................................................................................................................................. 4

1.1 Unit Capacities and Appearance ...................................................................................................................... 4

Part 2 Component Layout and Refrigerant Circuit ...................................................................................................... 5

2.1 Layout of Functional Components ................................................................................................................... 5

2.2 Piping Diagram ................................................................................................................................................. 8

2.3 Refrigerant Flow Diagram .............................................................................................................................. 10

Part 3 Control ............................................................................................................................................................ 11

3.1 Stop Operation ............................................................................................................................................... 11

3.2 Standby Control ............................................................................................................................................. 11

3.3 Startup Control ..............................................................................................................................................11

3.4 Normal Operation Control ............................................................................................................................. 13

3.5 Protection Control .........................................................................................................................................13

3.6 Special Control ............................................................................................................................................... 14

3.7 Role of Temperature Sensors in Control Functions ....................................................................................... 16

3.8 EEPROM Parameter Setting ......................................................................................................................... 20

3.9 . 26Electric Wiring Diagram ................................................................................................................................

Part 4 Troubleshooting 30.............................................................................................................................................

4.1 Unit Electric Control Box Layout .................................................................................................................... 30

4.2 Unit PCBs ........................................................................................................................................................ 33

4.3 Error Code Table ............................................................................................................................................ 39

4.4 Troubleshooting ............................................................................................................................................. 41

4.5 Appendixes to Part 4 ...................................................................................................................................... 80