Grundig GHP-MM08 User manual

01M-8508043600-2422-01
01M-8508053600-2422-01
01M-8508063600-2422-01
01M-8503073600-2422-01
01M-8503083600-2422-01
GHP-MM08
GHP-MM10
GHP-MM12
GHP-MM14
GHP-MM16
EN
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
1 Air Source Heat Pump 202202
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 Electric Wiring Diagram ................................................................................................................................. 26
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

4 / EN Heat Pump Monobloc Inverter / User Manual
202202 Heat Pump Space Heater 2
Part 1 General Features
1.1 Unit Capacities and Appearance
1.1.1 Unit Capacities
Table 1-1.1: Capacity range
Factory Model KS-80W/EN8BP KS-100W/EN8BP KS-120W/EN8BP KS-140W/EN8BP KS-160W/EN8BP
Model No. GHP-MM 08 GHP-MM 10 GHP-MM 12 GHP-MM 14 GHP-MM 16
Notes:
1. The full model names can be obtained by substituting the asterisk in the model name format
given in the left-hand column of the table above with the shortened model names given in the
table. For example, the model name for the 14kW model is GHP-MM14.
2. The presence or omission of the letter E and S in the model names indicates:
E: with internal backup heater; omitted: without internal backup heater.
3. Power supply:
220-240V, 50Hz, 1-phase.
1.1.2 Appearance
Table 1-1.2: Unit appearance
8kW
10/12kW 14/16kW

5 / EN
Heat Pump Monobloc Inverter / User Manual
3 Heat Pump Space Heater 202202
Part 2 Component Layout and Refrigerant
Circuit
2.1 Layout of Functional Components
GHP-MM08
Figure 2-1.1: top view
Figure 2-1.2: front view

6 / EN Heat Pump Monobloc Inverter / User Manual
202202 Heat Pump Space Heater 4
GHP-MM10
Figure 2-1.3: top view
Figure 2-1.4: front view
GHP-MM12
Figure 2-1.5: top view

7 / EN
Heat Pump Monobloc Inverter / User Manual
5 Heat Pump Space Heater 202202
Figure 2-1.6: front view
GHP-MM14/ GHP-MM16
Figure 2-1.7: top view

8 / EN Heat Pump Monobloc Inverter / User Manual
202202 Heat Pump Space Heater 6
Figure 2-1.8: front view
2.2 Piping Diagram
Figure 2-2.1: Piping diagram

9 / EN
Heat Pump Monobloc Inverter / User Manual
7 Heat Pump Space Heater 202202
Key components:
1. Compressor
Compress low temperature and low pressure refrigerant gas into high temperature and high
pressure refrigerant gas.
2. Electronic expansion valve (EEV)
Control refrigerant flow and reduce refrigerant pressure.
3. 4-way valve
Control refrigerant flow direction. Open in cooling mode and closed in heating mode. When
open, the air side heat exchanger functions as a condenser and water side heat exchanger
functions as an evaporator; when closed, the air side heat exchanger functions as an
evaporator and water side heat exchanger functions as a condenser.
4. High and middle pressure switch
Regulate refrigerant system pressure. When refrigerant system pressure rises above the
upper limit, the high or middle pressure switches will open and then turn off heat pump.
5. Low pressure sensor
Regulate refrigerant system pressure. When refrigerant system pressure falls below the
lower limit, low pressure sensor detects the limit value and then turns off heat pump.
6. Air purge valve
Automatically remove air from the water circuit.
7. Safety valve
Preventing excessive water pressure by opening at 43.5 psi (3 bar) and discharging water
from the water circuit.
8. Expansion vessel
Balance water system pressure. (Expansion vessel volume: 5L)
9. Water flow switch
Detect water flow rate to protect compressor and water pump in the event of insufficient
water flow.
10. Backup heater
Provide additional heating capacity when the heating capacity of the heat pump is
insufficient due to very low outdoor temperature. Also protects the external water piping
from freezing.
11. Internal water pump
Circulate water in the water circuit.

10 / EN Heat Pump Monobloc Inverter / User Manual
202202 Heat Pump Space Heater 8
2.3 Refrigerant Flow Diagram
Heating and domestic hot water operation (8,16KW for example)
Figure 2-3.1: Refrigerant flow during heating or domestic hot water operation
Cooling and defrosting operation (8,16KW for example)
Figure 2-3.2: Refrigerant flow during cooling and defrosting operations