Lampoassa VMI 6-17 Troubleshooting guide

LÄMPÖÄSSÄ
Vmi 6 – 17
LÄMPÖÄSSÄ 3/2016
INSTRUCTIONS FOR USE,
INSTALLATION AND
MAINTENANCE

100% GEOTHERMAL HEAT
2
Foreword
We thank you for your condence in our products and congratu-
late you on making an excellent choice! You have selected a long-
lasting and environmentally friendly Lämpöässä geothermal heat
system. We hope that you will enjoy the trouble-free heating pro-
vided by Lämpöässä for many decades to come. Please familiar-
ize yourself with these instructions for use and maintenance. Keep
the instructions for future use and reference should problems
occur.
These instructions consist of three manuals drawn up with con-
sideration of different user groups. The instructions for use include
manuals intended for users, installers, and maintenance person-
nel. The instructions also separately contain warranty conditions,
technical specications, and connection diagrams.

3
Contens
USER MANUAL 4
1. Safety 4
2. Geothermal heating system operation 4
2.1 Lämpöässä Vmi structure and operating principle 5
2.1.1. Heat collection circuit 5
2.1.2. Compressor unit 5
2.1.3. Hot water storage tank 5
2.2 ÄssäCooling cooling system 6
2.3. ÄssäSolar solar heating system 6
3. How to use the equipment 6
3.1. Control system functioning 6
3.2. Touch screen functioning 7
3.3. Setting the time and date 7
3.4 Function shortcuts 7
3.4.1. Room temperature adjustment 7
3.4.2. Room temperature adjustment by room temperature measurement
(optional equipment) 8
3.4.3. Domestic water boost 8
3.4.4. Home/Away function 8
3.4.5. Measurements 9
3.4.6. Timer functions 9
3.4.7. Adjustment curves 10
3.4.8. Storage tank settings 10
3.4.9. Optional equipment 10
3.5. Menu functions 10
3.5.1. Storage tank settings 10
3.5.2. Adjustment curves 11
3.5.3. Other set values 12
3.5.4. Measurements 14
3.5.5. Optional equipment 14
INSTALLER MANUAL 15
4. INSTALLATION WORKS 15
4.1. Before installation 15
4.1.1. Transport 15
4.1.2. Ground source heat pump installation area 15
4.1.3. Removing the packaging 15
4.1.4. Space requirements 16
4.2. HVAC installation 16
4.2.1. Heat collection circuit and ll group installation 16
4.2.2. Filling and de-aeration of the heat collection circuit 16
4.2.3. Heating and domestic hot water connections 17
4.2.4. HVAC checklist 18
4.3. Electrical installation and outdoor sensors 19
4.3.1. Outdoor sensor 19
4.3.2. Room sensor (optional) 19
4.3.3. Current monitor 19
4.3.4. Electrician’s checklist 20
4.4. Commissioning 20
MAINTENANCE MANUAL 21
5. MAINTENANCE 21
5.1. Maintenance and care 21
5.3. Alarms 22
5.4. Maintenance procedures 23
5.4.1. Manual control 23
5.4.3. Running information 24
5.4.4. Heat distribution circuit quantity 24
5.4.5. Domestic hot water temperature limit 24
5.4.6. Positioning valve control 25
5.4.7. Part-power / Full power 25
5.4.8 Resistor controlling method 26
5.4.9. Temperature gauges 26
5.4.10. External alarm 26
5.4.11. Soft starter alarms 26
5.4.12. Super heat circulation control 26
5.4.13. Boiler maximum limits 27
5.4.14. Cooling 27
5.4.15. Factory settings 27
6. WARRANTY CONDITIONS 28
7. TECHNICAL SPECIFICATIONS 29
8. ENERGY LABEL 31
9. CONNECTION DIAGRAMS 59

4
100% GEOTHERMAL HEAT
USER MANUAL
1. Safety
In order to ensure trouble-free operation of the Lämpöässä geothermal
heating system and achieve the best efciency, the system must be
transported and installed in accordance with the manufacturer’s instruc-
tions. After performance of installation works, the installation checklist
must be reviewed in order to minimise the risk of potential errors. The
manufacturer shall not accept any responsibility for equipment defects or
related expenses caused through installation faults.
The pipe and electrical installations for the Lämpöässä geothermal heat-
ing systems can only be installed by qualied persons. If problems
should occur during installation, we recommend that you contact your
dealer or consult with Lämpöässä maintenance specialists by phone.
If the fault symbol is displayed on the touch screen, a system
malfunction has occurred. Press this button to display infor-
mation on the cause of the malfunction.
HEAT DISTRIBUTION
CIRCUIT
HEAT COLLECTION
COOLING
GEOTHERMAL HEAT PUMP
Bore hole
Horizontal piping
in soil
Piping in water
Compressor
unit
Two-sectioned
storage tank
Heat collection
circuit
Heating water
Domestic water
Compressor
Evaporator
Superheater
Condenser
Press this button for additional information on the touch
screen data.
The type plate of the device can be found behind a white cover; the
device’s serial number is indicated on the type plate.
This heat pump is CE-marked.
2. Geothermal heating system operation
A geothermal (or ground source) heat pump can extract geothermal heat
from soil, water bodies or a bore hole. For an overview of the heat pump
and its operating environment, see the picture below. Of the total thermal
energy required for heating, Lämpöässä collects more than 75% from
natural sources. For thermal energy collection, approx. 25% of electrical
energy is required for running the various sys-
tem components.
The geothermal heating system consists of heat
collection piping, water/ethanol (ethyl alcohol)
mixture circulating within the piping, and a
ground source heat pump unit. The ground
source heat pump unit comprises an integrated
hot water storage tank, compressor, heat
exchangers, and closed refrigerant circuit, i.e.,
compressor unit. The heat collection uid in the
ground circuit, the refrigerant and the water in
the heating network never mix at any stage of
the process. Heat is transferred between uids
using plate heat exchangers.
i

5
USER MANUAL
Use the button in the bottom left corner to return to the home screen. Use the arrow button in the bottom right corner to return to previous screen.
For instructions screen, press the ‘i’ button in the top right corner. In case of operation faults, an alarm button is displayed on the top bar.
2.1 Lämpöässä Vmi structure and operating principle
The Lämpöässä Vmi is especially suitable for use as the primary heating
system of new and renovated residential buildings and secondary resi-
dences, as well as for condominium-specic heating in terraced houses and
detached houses. In order to ensure trouble-free operation, all Lämpöässä
geothermal heat pumps have been test-run, set up and tested by the manu-
facturer. If a geothermal heat pump is being used in the part-power congu-
ration, for example, because high temperature is required in the radiator
system, the heating system must be dimensioned and adjusted so that the
return water temperature is always below +55 °C.
By part-power we hereby mean that the electric heating element (immer-
sion heater) is allowed to switch on if necessary. For the operating prin-
ciple and main components of Lämpöässä Vmi, see the picture below.
The picture has also been discussed in the following paragraphs.
2.1.1. Heat collection circuit
The geothermal heat system circulates water/ethanol mixture protected
against freezing in the heat collection circuit in order to collect thermal
energy accumulated in soil through solar radiation. The heat collection
piping used comprises a bore hole or plastic pipe (PEM 40/10) placed at
least 1-1.2 metres deep in soil or at least 3 metres deep in water. The
circulating mixture warms up by a few degrees and delivers this thermal
energy to the geothermal heat pump’s EVAPORATOR (1), i.e., the heat
exchanger. The temperature of the heat collection uid arriving from the
soil to the evaporator is approx. 0 ºC (conditions in Finland). This tem-
perature can be lower in winter and higher in summer. At the evaporator,
the energy of the heat collection uid is transferred to the low-pressure
refrigerant circulating inside the heat pump. The refrigerant is evaporated
using the thermal energy.
Ground
circuit in
Ground
circuit out
1. 2.
4.
6b
6a
7b
7a
3.
5.
1. Evaporator
2. Compressor
3. Superheater
4. Condenser
5. Expansion valve
6a. Upper storage tank
6b. Lower storage tank
7a. Upper storage tank
domestic water coil
7b. Lower storage tank
domestic water coil
2.1.2. Compressor unit
From the evaporator, refrigerant vapour is transferred to COMPRESSOR
(2) for ramping up the pressure. This is accompanied by steep tempera-
ture rise. In the course of the heat pump process, the refrigerant tem-
perature is the highest after the compressor, in excess of 100 ºC, and the
refrigerant is referred to as ’hot gas’.
The hot refrigerant is transferred from the compressor to heat exchangers
(condenser and superheater), through which it releases its thermal
energy into the heating water STORAGE TANK (6). The heat in the stor-
age tank is used for heating and hot domestic water production pur-
poses. When heat is extracted from the refrigerant vapour, a point is
reached where the vapour begins to revert into liquid – i.e., is condensed.
This point is close to temperature required for heating (in general,
approx. 35-55 ºC). Since the refrigerant gas leaves the compressor at
70-120 ºC, it cools rst and liquees later. The energy released in the
course of such cooling is referred to as superheating energy. The super-
heating energy can be efciently utilised in nal heating of domestic
water, by using a SUPERHEAT EXCHANGER (3).
After the superheater, the refrigerant is transferred to CONDENSER (4),
where it is transformed from vapour to liquid, releasing the heat to the
heating water storage tank and from there to the heating network. Hav-
ing conceded its thermal energy, the liquid refrigerant is transferred
through dehydration lter to EXPANSION VALVE (5), where the pressure
of the liquid refrigerant drops and a new cycle from the evaporator can
commence.
2.1.3. Hot water storage tank
Lämpöässä Vmi utilises carefully designed superheating technology
allowing advantageous generation of heating and domestic hot water.
The objective is to maximise the share of geothermal heat in overall
heating. A two-sectioned HEATING WATER STORAGE TANK (6)
equipped with partition enhances utilisation of superheating energy. The
coefcient of performance remains at a high level, since the energy-ef-
cient superheating mixture involves heat transfer between two tank sec-
tions using two different heat exchangers (condenser and superheater).
Water from the hot water storage tank is circulated in the heat distribu-
tion piping consisting of either one or two loops.
The top part of the storage tank, i.e. the TOP STORAGE TANK (6a), is

6
100% GEOTHERMAL HEAT
USER MANUAL
Use the button in the bottom left corner to return to the home screen. Use the arrow button in the bottom right corner to return to previous screen.
For instructions screen, press the ‘i’ button in the top right corner. In case of operation faults, an alarm button is displayed on the top bar.
heated by using superheat removal heat exchanger (superheater 3) by
the extremely high thermal energy acquired from the compressor. Hot
superheating energy is stored for nal heating of domestic hot water. If
required, the high thermal energy can also be transferred to the heating
system from the top storage tank.
The LOWER STORAGE TANK (6b) stores the thermal energy required for
central heating from the condenser (4) at heating network-adjusted tem-
peratures lower than those of domestic hot water. The storage tank
temperature levels are controlled by an adjustment curve – thus, at ordi-
nary heating circumstances, the temperature varies depending on the
heating need. In such cases, the system operates in so-called ‘oating
condensing’ mode. Heat distribution can be arranged using water circu-
lation-based oor heating, hot water radiators or air heating. The best
coefcient of performance is achieved by oor heating, since the lower is
the temperature of heat release, the better is the coefcient.
Domestic water is heated within a COIL (7) inside the storage tank,
which is divided into two parts (7a and 7b). The domestic water is pre-
heated in the coil located at the storage tank’s lower part (7b), while nal
heating takes place inside the coil located at the tank’s upper part (7a).
In general, domestic water temperature must exceed that of the heating
water. Owing to the two-stage heat release of the superheating technol-
ogy, the larger storage tank section heating the supply water can be kept
at a lower temperature, since nal heating of the domestic water takes
place using the upper storage tank section of higher temperature. In such
a case, the process operation temperatures remain as low as possible,
which improves the system’s annual efciency. Division of the coil into
two parts allows heating of the domestic water circulation only using the
upper storage tank coil, so that blending of the storage tank temperature
stratications is avoided.
2.2 ÄssäCooling cooling system
A passive cooling system can be installed into the heat collection circuit,
in which case the uid in the circuit is circulated through an additional
heat exchanger. The heat exchanger releases cooling energy to indoor air.
Such exchangers include radiant cooling units provided within the venti-
lation system or fan coils installed indoor. The Lämpöässä product family
includes wall and ceiling-mounted fan units for cooling, complete with
installation set. Passive cooling is a favourable approach to cooling, since
the only running costs are associated with water circulation pump and
cooling fan operation. Vmi series heat pumps are equipped with factory
installed cooling connections rendering installation effortless. The cool-
ing connections are equipped with plugs; one of them is provided with a
connector for the pump included under the installation set.
2.3. ÄssäSolar solar heating system
There are pre-installed additional heating connections located in the top
section of Vmi series hot water storage tanks. These allow easy connec-
tion of a solar heating system directly
to the heat pump’s storage tank.
The ÄssäSolar collectors by
Lämpöässä operate at excellent ef-
ciency. This allows efcient conver-
sion of free solar energy for heating of
the building and domestic water alike.
3. How to use the equipment
3.1. Control system functioning
ÄssäControl by Lämpöässä is a logic-based control system. It considers
the conditions prevailing in the premises and the surrounding environ-
ment with improved precision. ÄssäControl control system adjusts the
heating network supply water temperature proceeding from the storage
tank and outdoor temperature based on a seven-point adjustment curve,
so that the room temperature remains pleasantly even regardless of out-
door temperature variations.
Depending on the connections, the control system controls 1-3 heat
distribution circuits or 1-2 heat distribution circuits and domestic hot
water temperature. With the help of the ÄssäControl control system, it is
also possible to control a heat source external to the geothermal heat
pump unit.

7
USER MANUAL
Use the button in the bottom left corner to return to the home screen. Use the arrow button in the bottom right corner to return to previous screen.
For instructions screen, press the ‘i’ button in the top right corner. In case of operation faults, an alarm button is displayed on the top bar.
These instructions contain a user manual and a manual for equipment
installer. Maintenance functions are password-protected.
3.2. Touch screen functioning
After unit start-up the display goes into basic mode, displaying on the
two-part ÄssäControl home screen function shortcuts (8 pc.), time, date,
and outdoor temperature. To switch between the two home screens, use
the arrow buttons in the bottom right corner. To access the Functions
screen, press the symbol in the top left corner. The function shortcuts
displayed on the rst home screen include room temperature adjust-
ment, domestic water boost, home/away function, and measurements.
The function shortcuts displayed on the second home screen include
timer functions, adjustment curve set values, storage tank set values,
and optional equipment.
Use the button in the bottom left corner to return to the home screen.
Use the arrow button in the bottom right corner to return to previous
screen. For instructions screen, press the ‘i’ button in the top right corner.
In case of operation faults, an alarm button is displayed on the top bar.
Alarms are described more in chapter 5.3.
3.3. Setting the time and date
The time and date can be adjusted by pressing the date/time displayed
on the home screen top part.
3.4 Function shortcuts
For user convenience, shortcuts have been provided to functions used
most often. Use home screen shortcuts to access the respective
functions.
3.4.1. Room temperature adjustment
The heat distribution circuit/circuits’ heat curve setting can be adjusted
by using the home screen shortcut Room temperature adjustment to
achieve room temperature increase or decrease. The setting can be
adjusted between -3...+3 °C by using the ‘plus’ and ‘minus’ buttons. The
function Room temperature adjustment is intended for quick tempera-
ture increase.
Choose the heat distribution circuits to be inuenced by the adjustment
by buttons HD1, HD2 (optional equipment) and HD3 (optional equip-
ment). To restore the original setting, change the value to 0 °C. The origi-
nal heating curve and heating curve adjusted by this function are visible
on the Heat adjustment curve screens.

8
100% GEOTHERMAL HEAT
USER MANUAL
Use the button in the bottom left corner to return to the home screen. Use the arrow button in the bottom right corner to return to previous screen.
For instructions screen, press the ‘i’ button in the top right corner. In case of operation faults, an alarm button is displayed on the top bar.
3.4.2. Room temperature adjustment by room tempera-
ture measurement (optional equipment)
As an option, the room temperature measurement function can be
acquired for the system. In such a case, the room temperature is also
displayed on the home screen and the screen Room temperature adjust-
ment includes information on current/target room temperatures.
Adjustment of room temperature now takes place by comparing the tar-
get and current room temperatures. By adjusting the target temperature
higher or lower than the room temperature at the time, the unit adjusts
the heat curve in the desired direction. Choose the heat distribution cir-
cuits to be inuenced by the adjustment by buttons HD1, HD2 (optional
equipment) and HD3 (optional equipment).
The rate of the function Room temperature adjustment can be increased
1...7 times by compensation. The compensation function is included
under additional room temperature settings, which can be accessed by
pressing the button at the bottom centre of the screen. In case of compen-
sation value 7, the adjustment is seven times faster than in case of value
1. Large compensation values can cause room temperature uctuations.
3.4.3. Domestic water boost
The storage tank can be set to function at maximum thermal output in
order to meet transient needs, for example, if the need for domestic hot
water increases temporarily. For domestic water boost, press the Max
button. Return to the normal mode by pressing the Eco button. Choose
the domestic water boost period (1...24 h) using the ‘plus’ and ‘minus’
buttons.
3.4.4. Home/Away function
The home/away function shortcut can be used to save energy when the
residents are away for a long holiday trip, for example. The function
Away changes the heat distribution circuit and storage tank temperature
settings until the set date and time; after that, the original set values are
automatically restored (i.e., the normal mode Home is reactivated).
The system’s normal mode is Home. To activate the Away function, press
the button Away and set the date and time of your return for restoring the
mode Home (default value: 24 h). The changes in room and storage tank
temperatures can also be programmed. In order to ensure restoring of the
normal temperatures by the time of your return from the holiday trip, the
day preceding the actual return date, for example, could be programmed
as the return date.

9
USER MANUAL
Use the button in the bottom left corner to return to the home screen. Use the arrow button in the bottom right corner to return to previous screen.
For instructions screen, press the ‘i’ button in the top right corner. In case of operation faults, an alarm button is displayed on the top bar.
Set the desired heat distribution circuit temperature adjustment under
Room temperature adjustment; values between -10...+10 °C are possi-
ble. Set the desired storage tank temperature adjustment value under
Storage tank temperature adjustment. This setting inuences domestic
water temperature. Values between -10...+10 °C are possible. If any of
these temperatures is not to be changed, keep 0 °C as its value. When
leaving for a holiday trip, for example, both of the values might be low-
ered by approx. 5 degrees by setting -5 °C as the room/storage tempera-
ture adjustment value.
The function can be activated only if the end date or time is in the future.
If the end date is set into the past, the mode Home is activated and the
mode Away cannot be activated.
3.4.5. Measurements
This shortcut allows accessing the Measurements menu, which will be
discussed in more detail in the Section on menu functions.
3.4.6. Timer functions
Timer functions can be utilised, for example, in secondary residences or
to benet from off-peak electricity rates, in which case weekday-specic
modication of temperature levels is advantageous. The values once set
are saved in the memory and can be modied as necessary.
The timer function can be activated or removed from use through the
Timer functions shortcut. On the Timer functions screen, the timing
target (storage tank or heat distribution circuit) is selected and the timer
function activated/deactivated.
On the following screens, the target weekdays for timed temperature
changes are selected. On the screens, the temperature change beginning
and end times (in full hours) can be set in weekday-specic manner, as
well as the change in degrees. Temperature change values between
-10...+10 °C are possible.

10
100% GEOTHERMAL HEAT
USER MANUAL
Use the button in the bottom left corner to return to the home screen. Use the arrow button in the bottom right corner to return to previous screen.
For instructions screen, press the ‘i’ button in the top right corner. In case of operation faults, an alarm button is displayed on the top bar.
3.4.9. Optional equipment
This shortcut allows accessing the Optional equipment menu, which will
be discussed in more detail in the chapter on menu functions.
3.5. Menu functions
Menu functions can be accessed by pressing the menu button on the
home screen.
3.5.1. Storage tank settings
Storage tank set values are used to adjust the storage tank top and bot-
tom section temperature limits to meet the site’s domestic hot water
consumption. The system includes a function that automatically elevates
storage tank temperature if the heat distribution circuit adjustment
curves are set higher than the storage tank temperature.
Factory settings for the storage tank bottom section are 40 °C (min) and
45 °C (max). Factory settings for the storage tank top section are 50 °C
(min) and 55 °C (max). The difference between Min and Max values can
be 2...10 °C. The maximum allowed storage tank top and bottom section
temperature set value is 60 °C in case of full power geothermal heat
The last timing column consists of symbols describing the state of timing.
A white symbol means that there is no active timer setting for the weekday.
A yellow symbol means that time and temperature have been set, but the
timer function has not been activated. A green symbol means that time and
temperature have been set and the timer function has been activated.
3.4.7. Adjustment curves
This shortcut allows accessing the Adjustment curves menu, which will
be discussed in more detail in the Section on menu functions.
3.4.8. Storage tank settings
This shortcut allows accessing the Storage tank settings menu, which
will be discussed in more detail in the Section on menu functions.

11
USER MANUAL
Use the button in the bottom left corner to return to the home screen. Use the arrow button in the bottom right corner to return to previous screen.
For instructions screen, press the ‘i’ button in the top right corner. In case of operation faults, an alarm button is displayed on the top bar.
water-related hazards. In general, the compressor is controlled according
to the minimum setting of the storage tank lower part.
In summer, when there is no need for heating (with the exception of
humid rooms), the compressor is seldom on and there is less superheat-
ing for domestic hot water production. In such a case the storage tank
upper part and lower part temperatures are close to each other.
3.5.2. Adjustment curves
Heat distribution circuits (HD) are controlled by a seven-point adjust-
ment curve. Depending on the connections, the control system controls
1-3 heat distribution circuits or 1-2 heat distribution circuits and domes-
tic hot water temperature. In the Adjustment curves menu, the values of
all heat distribution circuits can be changed separately to meet the heat-
ing water temperature (supply water) at a certain outdoor temperature.
Exemplary oor heating adjustment curve (factory setting) °C*
Outdoor temperature -20 -13 -7 0+7 +13 +20
Heating water temperature +32 +31 +29 +27 +25 +23 +21
Exemplary radiator heating adjustment curve °C*
Outdoor temperature -20 -13 -7 0+7 +13 +20
Heating water temperature +53 +48 +42 +36 +30 +25 +21
The factory-set adjustment curve is suitable for oor heating. The adjust-
ment curve values should be specied during the rst year; they could be
changed as follows, for example: If the indoor temperature feels too chilly
while the outdoor temperature is -10 °C, the supply water set value can
be increased a little at the outdoor temperature points -13 °C and -7 °C.
Monitor the inuence of the adjustment on room temperature for at least
24 hours before making any further modications in adjustment curve
set values. When using radiator heating temperature change is quicker.
* Conditions in Finland.
pumps and 60 °C (bottom section) / 85 °C (top section) in case of part-
power geothermal heat pumps.
The value Correction indicates the temperature as corrected by the Timer
function, Home/Away function, Domestic water boost function, or auto-
matic heat distribution circuit correction.
The storage tank temperature is a decisive factor in compressor starting
and stopping. The minimum value programs compressor starting at the
storage tank’s target temperature. The maximum value programs com-
pressor stopping at the storage tank’s target temperature.
The storage tank is heated by the compressor. If the target temperature
cannot be reached in a certain time (1...24 h), it is presumed that there
is something wrong with the compressor and the compressor is turned
off. In such cases, the storage tank is heated by the electric heating ele-
ment. The default set value for this function is 12 h. If the electric heat-
ing element is switched on, the following warning is displayed on the
control panel display: Storage tank temperature not achieved in set time.
Electric heating element has been switched on. For more information on
programming the time, see menu Set values. NOTE! Electric heating is
used only as back-up!
Maximum annual ground source heat pump efciency can be achieved if
the storage tank temperature is kept at an optimal level. The ground rule
is that the storage tank set values must be kept at the lowest possible
level, since it allows the best annual efciency.
In winter, when the need for heating is larger, the set value for the storage
tank bottom section should be programmed in relation to the supply
water temperature. The temperature of the storage tank upper part
increases after a long period of use and the threshold value for the com-
pressor to run is 90 °C. This is due to the superheating properties of the
storage tank structure. Because of this, the domestic hot water tempera-
ture limiting function (option) can be used in order to avoid potential hot

12
100% GEOTHERMAL HEAT
USER MANUAL
Use the button in the bottom left corner to return to the home screen. Use the arrow button in the bottom right corner to return to previous screen.
For instructions screen, press the ‘i’ button in the top right corner. In case of operation faults, an alarm button is displayed on the top bar.
For the temperature correction caused by Home/Away or Timer functions,
see the bottommost line.
Maximum domestic water temperature can be limited by adjusting the
Domestic water temperature limit value between 0...90 °C (factory set-
ting: 55 °C).
3.5.3. Other set values
The menu Other set values allows circuit-specic programming of maxi-
mum and minimum heat distribution circuit supply water values, as well
as programming of the safety device-heating element activation time.
3.5.3.1. Language
The Language menu allows choosing between Finnish, Swedish and
English for the user interface language.
3.5.3.2. Screen settings
On screen settings -page it is possible to adjust the brightness of the
screen and also the time after the screen goes off.
4.5.3.3. Min and max temperature of HD circuits
Set values are minimum possible values (min) and maximum possible
values (max). Heat distribution circuits 2 and 3 are optional.

13
USER MANUAL
Use the button in the bottom left corner to return to the home screen. Use the arrow button in the bottom right corner to return to previous screen.
For instructions screen, press the ‘i’ button in the top right corner. In case of operation faults, an alarm button is displayed on the top bar.
Factory settings for heat distribution circuits are as follows:
Set value and
setting range
Meaning Factory
setting
Supply water1
max 0…90 °C
Maximum value of heat distribution
circuit 1 heating supply water.
60 °C
Supply water1
min 0…90 °C
Minimum value of heat distribution
circuit 1 heating supply water.
5 °C
Supply water2
max 0…90 °C
Maximum value of heat distribution
circuit 2 heating supply water.
60 °C
Supply water2
min 0…90 °C
Minimum value of heat distribution
circuit 2 heating supply water.
5 °C
Supply water3
max 0…90 °C
Maximum value of heat distribution
circuit 3 heating supply water.
60 °C
Supply water3
min 0…90 °C
Minimum value of heat distribution
circuit 3 heating supply water.
5 °C
3.5.3.4. Safety device settings (in monovalent devices)
This screen allows programming activation of the safety device-heating
element if the storage tank target temperature is not achieved by the com-
pressor during the dedicated period (from 0 to 24 hours, factory setting:
12 hours). The setting is applicable in full-power systems only.
3.5.3.5. Bivalent settings (in bivalent devices)
In bivalent system the immersion heater and compressor can be on at the
same time. In bivalent settings -page can be set the heating time before
additional heating goes on.
3.5.3.6. Summer functions
This screen allows stopping of the heat distribution circuit water circula-
tion pumps during the summer to save energy.
3.5.3.7. Brine circuit circulation pump control
This screen allows adjustment of the ground circuit uid ow rate. If the
setting is 100%, the ow speed is maximal. If the setting is 0%, the ow
speed is minimal. Factory setting is 90%.
3.5.3.8. Passive cooling
There is a possibility to install cooling system to the heat pump brine col-
lector circuit. Brine collector liquid is circulated through cooling system
installed in to the premises. Passive cooling is energy efcient method of
cooling as the only cost is electrical consumption of the circulation pump
and cooling convector fan.
Room temperature control
In this screen operational area of the cooling system is adjusted. In addi-
tion of this in the screen there are values for room temperature, liquid
temperature, humidity and dew point indicated. Also status of the system

14
100% GEOTHERMAL HEAT
USER MANUAL
Use the button in the bottom left corner to return to the home screen. Use the arrow button in the bottom right corner to return to previous screen.
For instructions screen, press the ‘i’ button in the top right corner. In case of operation faults, an alarm button is displayed on the top bar.
(heating/cooling/turned off) is informed.
External control
When controlling method is external cooling is controlled by external ther-
mostat which to be connected according the electrical drawing.
Manual control
When controlling method is manual can cooling be activated in this screen.
System aims to maintain cooling liquid temperature one degree above the
dew point. Cooling liquid temperature can also be adjusted to be standard
when dew point effect is not recognized.
3.5.4. Measurements
Ground source heat pump operation can be monitored using various differ-
ent measurement data. Use the screen numbering in the bottom bar for
navigating between the Measurements screens. Measurements screen
values describe heat pump operation under various conditions and the
values shown cannot be modied. The left-hand column indicates current
measurement values and the right-hand column the respective set values.
Measurement results from all sensors, compressor running times, and
electric heating element operation times can be browsed.
3.5.5. Optional equipment
In addition to the standard delivery, all of the additional features acquired
are displayed on the Optional equipment screen.
Possible optional equipment includes:
Optional equipment For more information, see
Heat distribution circuit 2 Adjustment curves, Timer functions
Heat distribution circuit 3 or
Domestic water temperature limit
Adjustment curves, Timer functions
Adjustment curves
Additional heat control Optional equipment / Additional heat
settings Other settings / Additional heat set-
tings (only in case of part-power systems)
Room temperature measurement Shortcut functions, Adjustment curves
Passive Cooling Adjustment curves

15
4. INSTALLATION WORKS
4.1. Before installation
Pipe assemblies for the installation of the Lämpöässä system may only be
installed by qualied and trained persons. The equipment must be installed
in compliance with instructions provided; after performance of installation
works, the installation checklist must be reviewed in order to minimise
potential errors. The manufacturer shall not be responsible for any equip-
ment defects or related expenses caused through installation faults.
Check that:
• all the necessary hoses and sensors have been delivered
• the ground source heat pump has been correctly tted
• the connections on top of the geothermal heat pump are intact
• the fuse size is correct for the master fuse and the ground source
heat pump (see technical specications)
• the ground circuit collection piping and supply piping have been
installed properly
4.1.1. Transport
The Lämpöässä geothermal heat pump must always be transported in a
vertical position. If tilting the equipment is unavoidable, for example, to
pass through a doorway, the maximum tilting angle allowed is 45°. In
other cases, the machine’s compressor unit must be detached during tilt-
ing. The equipment may be moved from beneath using a fork lift, for
example. Do not go underneath the
equipment while it is being lifted!
A transportation platform has been
fastened on both sides of the
ground source heat pump using
screws. The ground source heat
pump’s accessory package includes
adjustable feet to be screwed into
the unit bottom (see picture). After
that, remove the wooden platform elements and their xation screws (4
pc). To remove the platform, lift the equipment by a fork lift, for
example.
4.1.2. Ground source heat pump installation area
We recommend that the Lämpöässä ground source heat pump be installed
in a warm room with oor drain. During installation, when lling the
ground circuit, some water/ethanol or water/glycol mixture may be
splashed onto the oor. The chosen area does not have to be reproof.
Approx. 30 cm of installation space should be reserved above the
equipment.
The oor must be able to withstand the weight of the ground source heat
pump carrying a full storage tank (= own weight + 500 kg). The oor
must also be sufciently even, because the ground source heat pump
must be installed as level as possible. Final adjustments can be made
using the adjustable underneath the equipment.
4.1.3. Removing the packaging
Remove the plastic wrapping and corner padding from around the prod-
uct. Check that the pump has not suffered any transportation damage. If
the heat pump is found to be damaged, the transport company must be
immediately notied.
Also check the contents of the delivery immediately. The Lämpöässä Vmi
series accessory package includes the following components:
• exible ground circuit hose (approx. 600 mm) – 2 pc.
• outdoor sensor
• adjustable foot (4 pc.)
• shut-off valve 1”
If some of the accessories specied in the order are not included in the
delivery, notify the equipment dealer within ve days.
INSTALLER MANUAL

16
100% GEOTHERMAL HEAT
16
INSTALLER MANUAL
4.1.4. Space requirements
A Lämpöässä Vmi ground source heat pump can conveniently be placed
into a technical or utility room. The oor space to be reserved for the
machine needs not signicantly exceed its external dimensions. Approx.
50-60 cm of installation room should be reserved on the respective side
for lateral ground circuit connections. Considering possible equipment
maintenance, there must be approx. 70 cm of free space in front of the
geothermal heat pump.
The height of a Lämpöässä Vmi series ground source heat pump (includ-
ing adjustable feet) is at least 183 cm. The transport platform adds some
8 cm. Approx. 30 cm of free space must be reserved for connections on
top of the machine. This should be kept in mind when installing the equip-
ment into a low room, such as basement.
4.2. HVAC installation
4.2.1. Heat collection circuit and ll group installation
On the right side of the ground source heat pump there are entry points
for heat collection circuit hoses. Install the exible supply (1) and return
(2) hoses included in the accessory package into the heat collection pip-
ing. See picture. Attach the shut-off valve included in the accessory pack-
age to the end of the rear hose. The hoses
and joints must be sealed carefully.
If cooling equipment located higher than
the ground source heat pump is connected
to the pump, a membrane expansion ves-
sel must be included in the system. In
such cases, a de-aeration connection must
be installed to the highest point of the
system and the ll container removed from
use by closing the shut-off valve under-
neath it.
Vmi 6 – 17 space
requirements (mm)
A50
B50
C500
O700
X1570
F700
Y1420
B
A
X
Y
F
C
O
670,8
1020
700
4.2.2. Filling and de-aeration of the heat collection circuit
Accessories required for the lling and de-aeration of the ground circuit:
• mixing tank, 60 litres
• submersible pump tted with a lter, lifting height approx. 30m
• water/ethanol or water/glycol mixture (1:1) with a frost
resistance of -16 °C
• reinforced hose 1” (2 pc.), length approx. 3 m
• connector 3/4” (female thread) for reinforced hose
• connector 1” (female thread) for reinforced hose
WORK STAGES
Please check that the ground circuit
has been correctly connected.
1. Remove the styrox packaging
protecting the group of ll
valves.
2. Detach the expansion vessel
from the foremost ball valve.
3. The foremost shut-off valve (2)
of the group of ll valves must
always be open.
4. Attach the submersible pump textile hose to the foremost ball valve
(3) in the group of ll valves and open the ball valve.
5. Attach a reinforced hose from the ball valve (4) at the back of the
group of ll valves to the ll container and open the valve.
NOTE! The ow direction has to be correct since there is a one
way valve installed between the cooling connections.
6. Fill the container with water/ethanol or water/glycol (frost r.
7. Bleed air from ll hoses by activating the submersible pump and
keeping the valve (1) open. When air has escaped, close the valve
(1) to start actual uid circulation through the ground circuit.
8. Add uid until the piping is full. Upon de-aeration, the unit’s own
brine circulation pump can be used to speed up uid circulation.
• Check that the motor protection switch (QM1) is not on.
• Turn master switch (Q1) and control current switch (F10) on.
• The forced control of gound circuit pump can be activated
from the maintenance manual of ÄssäControl. Go to manual
control and choose manual control on and ground circuit 1
on.
NOTE! When using the system’s own brine circulation pump for
de-aeration purposes, check that the ow direction of the separate
submersible pump is always the same as that of the unit’s pump.
9. Keep the submersible pump running until the uid is clear and no
gurgling can be heard from the pipes. NOTE! De-aeration usually
takes several hours and helps to ensure that all the air is remove
from the system and will not cause any malfunctions once the
system is started. Leave no pressure in the network! Remove any
air from the evaporator through the de-aeration connection of the
pipe located between the ground circuit and the evaporator.
12
4
5
3
-16 °C) mixture (ratio 1:1).
1. 2.

1717
INSTALLER MANUAL
10. When de-aeration has been completed turn the motor protection
switch QM1 off and also manual control function off.
11. Open shut-off valve (1) at the back of the group of ll valves.
12. Close both ball valves (3) and (4).
13. Remove the ll hoses.
14. Fasten the expansion vessel back in its place in the foremost ball
valve (3) in the group of ll valves.
15. Remove the safety valve on the expansion vessel.
16. Fill ¾ of the expansion vessel with water/ethanol or water/glycol
mixture.
17. Fasten the safety valve to the expansion vessel.
18. Open the foremost shut-off valve (3) in the group of ll valves.
19. Remove and clean the net strainer (5) on the mud separator,
repeat this several times, if necessary. The red-handled valves (1)
and (2), as well as the valve under the ll container (3) must be
closed in order to prevent uids from running out.
Filling and de-aeration have now been completed.
4.2.3. Heating and domestic
hot water connections
Remove the crown panel from the
geothermal heat pump’s upper part
for the duration of installation works
by undoing the two screws shown in
the picture. Pull the crown panel directly forward and lift it off the heat
pump. Make the heat distribution and domestic water connections as
shown in the picture below.
1
2
3
45 6 7
8
10
9
11
1213
1. Lämmönjako 1, meno Heating flow 1 22 mm
2. Lämmönjako 1, paluu Heating return 1 22 mm
3. Lämmönjako 2, meno Heating flow 2 22 mm
4. Lämmönjako 2, paluu Heating return 2 22 mm
5. Kylmä vesi Cold water 22 mm
6. Lämmin vesi DHW flow 22 mm
7. Paisunta Expansion ¾”
8. Maapiiri, meno Collector circuit, flow 1”
9. Maapiiri, paluu Collector circuit, return 1”
10. Jäähdytys, meno Cooling, flow 1”
11. Jäähdytys, paluu Cooling, return 1”
12. Aurinkoyhde, meno Solar connection, flow ¾”
13. Aurinkoyhde, paluu Solar connection, return ¾”
14. Kv-kierto Hot water circulation ½”
Varaajan täytön yhteydessä varaajassa olevan ilman on päästävä vapaasti
poistumaan. Huom! Ei ilmaventtiilin tai varoventtiilin kautta.
While lling the storage tank outgoing air has to be freely deated.
NB! Not via air valve or safety valve.
14
Heating connection
Heat distribution circuit surface sensors located on top of the storage tank
must be installed to the distance of approx. 0.5 m from the three-way or
four-way valve. Circuit HD1 is always the main heating circuit (rooms, for
example); it is used for higher temperature (radiator heating, for example). In
case of compressor malfunction, the electric heating element heats the cir-
cuit HD1 more efciently. Circuit HD2 is used in radiator-heated buildings for
the possible oor heating share or for other purposes (e.g., humid rooms).
Speed controlling of the heat circulation pumps
Grundfos UPM3 AUTO heat circulation pump which is used in a HD cir-
cuit can be set in three different controlling modes: proportional pressure
mode, constant pressure mode, constant curve mode. Factory setting is
proportional pressure mode 3. In radiator network constant pressure
mode 1 or 2 can be used if sound of the ow water is disturbingly high.
Proportional pressure mode LED1
green
LED2
yellow
LED3
yellow
LED4
yellow
LED5
yellow
Proportional pressure mode 1
Proportional pressure mode 2
Proportional pressure mode 3
Auto Adapt
Constant pressure mode LED1
green
LED2
yellow
LED3
yellow
LED4
yellow
LED5
yellow
Constant pressure mode 1
Constant pressure mode 2
Constant pressure mode 3
Auto Adapt
Constant curve mode LED1
green
LED2
yellow
LED3
yellow
LED4
yellow
LED5
yellow
Constant curve mode 1
Constant curve mode 2
Constant curve mode 3
Constant curve mode 4

18
100% GEOTHERMAL HEAT
18
INSTALLER MANUAL
The storage tank is to be lled with special care through the group of ll
valves included in the system so that the storage tank pressure never
exceeds 1.5 bar. While lling the storage tank, the air inside it must be
allowed to escape freely and not through air valve or safety valve, for
example. Suomen Lämpöpumpputekniikka Oy cannot be held respon-
sible for any expenses resulting from storage tank breakage in situations
where the tank has not been lled with water pursuant to the above
instructions.
NOTE! Maximum storage tank pressure is 1.5 bar!
The pipes in the heating network are connected to the ground source heat
pump using either textile hoses (network of radiators) or using a xed
piping network (oor heating). These connections prevent sound from
passing into the network. All heating connections (for example, a heating
radiator for an air conditioner or a heated towel rail) must be made to the
heat distribution circuits, not domestic hot water. When the network pip-
ing is in place, lling may commence.
Storage tank and heating system lling and de-aeration
There must be a de-aeration valve in the same branch with the group of
ll valves. The expansion vessel may be in the same branch as well. The
pipes in the network are lled with water. Note! If renovating, ensure that
the heat distribution piping has been properly rinsed before connecting the
geothermal heat pump.
Filling and de-aerating a heating system tted with a pressure gauge:
• Open the ll valve on the heating network.
• Fill the network with water.
• De-aerate the storage tank and network until all the air has been
removed and leave the pressure at 1-1.2 bar (max. 1.5 bar).
• Maximum pressures:
• Heating network storage tank – 1.5 bar
• Domestic hot water circuit – 9 bar
Domestic hot water connections and circulation of water
If there is no domestic hot water circulation at the site, make connections
pursuant to HVAC diagrams annexed to these instructions. Domestic
water is connected to the ground source heat pump pursuant to the pic-
ture in Section 4.2.3. The same picture is provided on top of the unit. The
mixing valve is tted to the hot water pipe in order to prevent burns. The
overow pipe is joined to the oor drain as instructed or to an overow
funnel if the distance to the oor drain is more than two metres. The
overow funnel must be directed down towards the oor drain. The back-
pressure valve is tted to the cold water joint on the input side. See the
annexed HVAC connections diagram.
If DHW circulation is installed to the system should circulation pump to
be installed to the DHW return pipe. DHW coil in the model Vmi has two
seperate sections. When there is no water consumption temperature level
of the circulation is maintained by circulating water only in the upper tank
coil. This avoids mixing of the temperature levels inside a tank. In a nor-
mal circumstances coils are connected to copper coil which is located on
a roof of the heat pump. When installing DHW circulation ½” plug –
visible in the picture below – will be removed and all connections are
implemented according the HVAC scheme.
If there is domestic hot water circulation at the site, install the water cir-
culation pump to the domestic water line returning to the heat pump. In
case of the Vmi series, the domestic hot water coil has been divided into
two parts. If there is no domestic water consumption, the coil temperature
level is maintained by circulating water only in the upper storage tank coil.
This way, blending of storage tank temperature stratications is avoided.
Under normal circumstances, the coils are connected using a copper
elbow located on top of the heat pump. The elbow is cut and connections
made according to the annexed HVAC diagram.
If the ground source heat pump is located far from the building heated or
if heat losses are exceptionally high, for the purposes of optimal ground
source heat pump operation, we recommend installation of a small addi-
tional heat source (e.g., ÄssäStream heating convector or approx. 20-30 l
electric water heater).
NOTE! External radiators or dryers may not be connected to domestic hot
water circulation!
4.2.4. HVAC checklist
Check that
• the joints are tight and there are no leaking valves
• the expansion vessel on the heating system and ll side is
properly installed
• the overow pipe on the safety valve and the pressure gauge on
the heating system have been properly installed

1919
INSTALLER MANUAL
• the heating system has been lled and de-aerated appropriately
• the ground circuit has been installed, lled and de-aerated
appropriately
4.3. Electrical installation and outdoor sensors
Only qualied electricians are permitted to carry out electrical work on the
heat pump according to general regulations.
Unit Power supply Fuse size, slow, A
(*in case of part-power)
Vmi 6 400 V 3N~ 3x10 (*16)
Vmi 9 400 V 3N~ 3x16 (*20)
Vmi 11 400 V 3N~ 3x16 (*20)
Vmi 11 1-phase 230 V 1N~ 1x32
Vmi 14 400 V 3N~ 3x16 (*20)
Vmi 14 1-phase 230 V 1N~ 1x40
Vmi 17 400 V 3N~ 3x16 (*20)
The Lämpöässä heat pump is connected to a 230 V or 400 V (50 Hz)
electrical network. The Lämpöässä heat pump has been tted with an
integrated electrical switchboard which is permanently powered. The loca-
tion of the protection switch for the motor and other tripping devices are in
the electrical switchboard that is inside the heat pump. A plastic-coated
wire is used as a supply line, which wire travels to the master switch in a
casing pipe. The electrical switchboard cover can be removed without
crown panel removal, by undoing four screws on top of the switchboard.
4.3.1. Outdoor sensor
In order for the outdoor sensor to recognise weather conditions as effec-
tively as possible, it must be placed in the correct location. The outdoor
sensor should be placed on the north-west-
ern or northern side of the building to avoid
the effects of the morning sun. If the sensor
cannot be placed as recommended, ensure
that this is protected from direct sun light.
The sensor is placed approximately 2/3 of the way up to the wall of the
building near the corner. A sensor should not be placed under a roof, in a
place protected from the wind or over a vent, doors or windows where the
temperature is not the normal outdoor temperature.
Device Terminal block No. Conductor type
Outdoor sensor NTC X1/10 ja X1/2 2 X 0,7 mm2
4.3.2. Room sensor (optional)
In order for the room sensor to detect average indoor temperatures as
reliably as possible, it must be placed in a central and open location, for
example a hallway between several rooms or the staircase. String a bipo-
lar electrical line (at least 0.5 mm2) from the heat pump to the room
sensor. Position the room sensor approximately 2/3 of the way up the
wall. Connect the room sensor lead to the heat pump.
Device Terminal block No. Conductor type
Room sensor NTC X1/14 ja X1/2 2 X 0,7 mm2
4.3.3. Current monitor
If the equipment has been installed in the part-power conguration, load
limiting relays must be installed to the building’s master electrical switch-
board, if necessary. These relays are intended to reduce the power of the
ground source heat pump’s electric heating element by phases if the
phase current passing through the building’s master fuses approaches the
master fuse nominal current.
Load limiting relays are connected downstream of the master electrical
switchboard’s master fuse so that the entire building’s main current
passes through the relays. Contact data of load limiting relays are wired
by quadrupole cable from the master switchboard to the ground source
heat pump electrical switchboard, where they are connected to the control
circuit diagram. The load limiting relay circuit diagram has been annexed
to these instructions.
Current monitoring relay installations and connection
These settings are initial and may require changing. Relays must always
be adjusted in a case-specic manner.
• Choose correct current range
• Turn switch 2 to position ON (if
master fuse size is less than 50A)
• Other switches 1, 3-6 to position
OFF.
• Adjust hysteresis, current % and
delay using screws in the front part
(master fuses 25 A)
• Hysteresis 21
• Current 25 - 28 %
• Delay 1s
• The relay requires external voltage 24-240 V/AC.

20
100% GEOTHERMAL HEAT
20
INSTALLER MANUAL
• External supply is connected to terminals A1 and A2.
• Terminals 15 and 16 are connected to geothermal heat pump and
interrupt the heating element’s supply with respect to the phase the
current value of which is exceeded.
• Each phase must be lead through the relay using the dedicated hole
inside it: L1 for relay 1, L2 for relay 2, L3 for relay 3
No other connections with relay are necessary.
4.3.4. Electrician’s checklist
Check that
• all phases going to the switchboard are in the correct phase
sequence
• the master fuse is of sufcient size
• the ground source heat pump’s fuse size is correct, type: slow (C
curve)
• if necessary, current monitor has been installed to the building’s
master electrical switchboard (part-power models)
If the ground source heat pump is started for the rst time without
pre-heating, compressor will be damaged. Fill the storage tank with
water and prevent the compressor from starting by pressing down the
red compressor motor circuit breaker. Switch on the ground source heat
pump’s power supply, the electric heating element begins to heat the
water contained in storage tank. A regulator alarm goes on and the text
“Compressor 1 circuit 1 some motor protection gone off. Check motor
protection F1, F2 or F3” appears on the display. Later another regulator
alarm goes on and the text “Resistor functioned in full power system”
appears. These alarms do not require taking any measures. Starting of
the compressor is allowed after six hours of pre-heating.
NOTE! A COMPRESSOR STARTED WITHOUT PRE-
HEATING IS NOT COVERED BY WARRANTY!
4.4. Commissioning
Before commissioning, check that:
• the heating system has been connected, lled and de-aerated
appropriately
• the ground circuit has been installed, lled and de-aerated
appropriately
• electrical connections have been made appropriately and the
outdoor sensor (and optional room sensor) has been installed
• after preventing the compressor from starting, water in the
storage tank has been heated by the electric heating element for
at least 6 hours
Possible problems during startup
Problem Cause Solution
Fuses always blow
when the compressor is
started.
You are using the wrong
type of fuse.
Check that the fuse
is automatic: C or D /
ceramic fuse: SLOW or
with a snail icon.
Temporary connections
at the site are causing an
overload of the fuses
Reduce load.
The heat collection
circuit pump does not
start.
The regulator may not be
getting any power.
Check the regulator fuse.
The regulator is not au-
thorised to start the pump.
Check the measured/set
values.
The shut-off valves are in
the ll position.
Check that the de-
aeration and ll valves
are in the closed position
and that the intermedi-
ate valve is open.
The heat collection
circuit’s water circulation
pump motor protection
switch has gone off.
Reset the motor protec-
tion switch and check
the set values from
electrical diagram.
The compressor runs
for a little while and
the evaporator pressure
switch goes off.
There may still be air in
the heat collection circuit.
De-aerate the heat col-
lection circuit.
There may be a leak in the
refrigerant circuit.
Contact the equipment
installer or dealer.
The uid level in the
heat collection circuit ll
container drops suddenly
after startup.
There is a leak in the
system (the smell of ethyl
alcohol or glycol is strong),
there is a leak in the heat
collection circuit or there
is still air in the circuit.
Check the condition of
valves in the de-aeration
group, air valve and the
shaft seal on the ground
circuit pump, check the
condition of heat col-
lection circuit extension
joints, or de-aerate.
Motor protection
switches go off when
starting.
The compressor or the
ground circuit pump is
short-circuited or one
of the phases is not
activated.
Check electrical connec-
tions.
The fuses in the master
switchboard of the build-
ing have blown or are
faulty.
Check and replace fuses
as required.
The maintenance menu section Manual control allows manual control of
compressors, pumps and valves. This facilitates troubleshooting process
and may be of help in case of starting problems.