26 NIBE BA-SVM 10-200
Pump speed at start
10
10
20
30
40
50
60
70
80
90
0
0
-10-20 20
30
Utetemp -EB10X -BT28
% av max speed
Max speed (%)
Outdoor temp -EB10X -BT28 (°C)
Flow settings charge pump GP12
This function is used to check the flow between in-
door and outdoor units. The purpose of the function
is to be able to diagnose the fault in the event of sus-
pected flow related problems.
Program sequence:
• Check that BT6 is less than 40*C otherwise the text
”Drain hot water to cool Water heater” appears.
• Sets reversing valves to HW-mode.
• Starts GP12 and runs at maximum speed.
• Starts the compressor.
For on/off models the following applies: if the com-
pressor does not start within 10 minutes, the flow
setting is cancelled and information is given stating
that the compressor could not be started.
For inverter models the following applies: if the com-
pressor does not start or reach 55 hz within 10 min-
utes, the flow setting is cancelled and provides in-
formation stating that the compressor could not be
started/reach the desired frequency.
For 1-phase inverters, the phase that the 1-phase invert-
er is connected to is detected. A message is given stat-
ing that the 1-phase inverter is being detected. When
the phase has been detected the message ”Compres-
sor detected on phase L?” is shown. If the compressor
could not be detected the message ”Could not detect
compressor phase” is shown. This function may run
during the 5 minutes that the compressor is to run be-
fore the flow checks below are started.
• Ensure that the compressor has run for at least
5 minutes.
• Shows blank screen with 5 minutes countdown.
• Shows highest recommended Δt for the given
outdoor temperature.
• Shows relevant Δt above BT12 and BT13 (the up-
dating frequency is 10 seconds) and calculates an
average value over 10 seconds.
• The user adjusts the flow
• Increase/Decrease the flow indicated in the dis-
play depending on the conditions for the selected
heat pump (slave1)
• When the condition has been met for 1 minute,
”Pump setting OK” appears.
• When the user exits the menu, control of the
charge pump is released again and returns to the
same operating mode as for the setting.
Dimensioned flow for BA-SVM 10-200 is 12 kW at 9
°C. It gives a flow corresponding to 1150 litres. The
coil in the water heater can be deemed to correspond
to the pressure drop in the radiator circuit. For small-
er external parts, AMS 10, 20% less flow than the
dimensioned flow is permitted.
Hot water
If hot water in menu 5.11.1.2 is set to auto, GP12 con-
trols according to ”Determining the speed using reg-
ulator”, otherwise after the manually set speed.
POOL
If pool in menu 5.11.1.2 is set to auto, GP12 controls
according to ”Determining the speed using regula-
tor”, otherwise after the manually set speed.
Defrosting
Any control is stopped
During defrosting the speed is set to a maximum of:
• The average value of the speed GP12 that the
compressor ran to meet the heating demand of
the current defrosting/ manually set speed for
the 2 last minutes.
• 50 %
During tank defrost the speed is set to a maximum of:
• The average value of the speed GP12 that the com-
pressor ran to meet the heating demand of the current
defrosting/ manually set speed for the 2 last minutes.
• 70 %
At completed defrosting:
• If GP12 is controlled, it returns to 30 % higher
speed than it had just before defrosting. The ex-
ception is if priority shift occurs during/in con-
junction with defrosting. This priority shift is then
treated as a normal shift.
• If GP12 is not controlled, GP12 returns to the
speed set for respective demand according to
menu 5.11.1.2.
During passive defrosting:
• GP12 controlled according to operating mode
Auto/Intermittent in menu 5.11.1.2
If GP12 is stationary regardless of operating mode,
the pump exercising function is used.
In emergency mode, GP12 is run without PWM sig-
nal, which means that it runs at maximum speed.
Section 4 | Description of functions
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