Problem - Alarm Brine Out; Problem - Alarm Brine Flow Low - Danfoss DHP-H Installation And Service Instructions Manual

Cause
5. No or insufficient circulation in the heat-
ing system.
6. The submersible tube in the electric heat-
ing element is against the coils.
Problem – Alarm Brine out
Cause
1. Defective sensor.
2. Brine temperature too low.
Problem – Alarm Brine flow low
Cause
1. Incorrect system selected in the control
computer.
If the system does not contain a flow switch
but the control computer is set for the sys-
tem with flow switch, this alarm occurs.
2. Insufficient flow.
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Troubleshooting
• That the strainer is not blocked.
• That no air is in the heating system.
Check what the flow temperature is when the
overheating protection trips. It normally trips at
about 95°C.
Troubleshooting
Check what the sensor shows, is it a plausible/
actual value?
Measure the resistance of the sensor, check
against the ohm table in the Measurement
points section.
Check the set value on ALARM BRINE in the
heat pump's control computer.
Troubleshooting
In the menu SYSTEM, check which is selected.
• Check whether the ground water pump is
running?
• Check the flow switch.
• Calibration/setting the flow switch.
• Blocked exchanger?
VMBMA602
Remedy
The circulation pump may have
jammed, if so, open the bleed screw and
try to release the paddle wheel using a
screwdriver for example.
Open closed valves or taps.
Check, and, if necessary, clean the
strainer.
If necessary, bleed the heating system
according to the installation instruc-
tions.
The submersible tube can be prised out
slightly from the coils using a screw-
driver or similar. The submersible tube
must be vertical.
Remedy
If the sensor is defective, replace it.
The alarm is triggered when the temper-
ature on BRINE OUT is as low or lower
than the set value on ALARM BRINE. In
the factory setting this function is inac-
tive.
Remedy
If the incorrect system is selected,
change it.
The ground water pump must start and
run together with the heat pump's inte-
grated brine pump.
Check against the wiring diagram that
the flow switch is correctly connected.
Check that the flow switch is set for the
correct working range according to the
flow switch instructions.
If the exchanger is blocked, clean or
replace it.