Danfoss DHP-A Service Instructions Manual page 46

Table 20. Problem – Alarm Brine flow low
Cause
1. Incorrect system selected in the
control system.
If the system does not contain a flow
sensor but the control system is set
for the system with flow sensor, this
alarm occurs.
2. Insufficient flow.
Table 21. Problem – Alarm brine pump
Cause
The brine pump's integrated alarm has
deployed. (Only applies Opti)
Table 22. Problem – Alarm circulation pump
Cause
The circulation pump's integrated
alarm has deployed. (Only applies
Opti)
44 – Service instructions VMGFC302
Troubleshooting
In the menu SYSTEM, check which system
is selected.
•
Check whether the ground water
pump is running.
•
Check the flow sensor.
•
Calibration/setting the flow sensor.
•
Blocked exchanger?
Troubleshooting
•
Air in the brine pump?
•
Has the brine pump jammed?
Troubleshooting
•
Air in the circulation pump?
•
Has the circulation pump jammed?
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.
Remedy
Bleed the brine circuit according to the
installation instructions.
If the brine pump has jammed, there is
an integrated shake function that
attempts to shake itself loose up to a
maximum of 5 times, if it does not man-
age this, an alarm will occur.
Try cutting the voltage to the heat
pump to stop the alarm and then man-
ually run the brine pump.
If the alarm recurs, repeat the procedure
several times. If this does not help,
replace the brine pump.
Remedy
Air in the brine circuit. See the installa-
tion instructions for information on how
to perform filling.
If the circulation pump has jammed,
there is an integrated shake function
that attempts to shake itself loose up to
a maximum of 5 times, if it does not suc-
ceed, an alarm will occur.
Try cutting the voltage to the heat pump
to stop the alarm and then manually run
the circulation pump.
If the alarm recurs, repeat the procedure
several times. If this does not help,
replace the circulation pump.