Operational Problem - Leakage - Danfoss DHP-AL Installation And Service Instructions Manual

Cause
5. Lack of refrigerant, not enough refriger-
ant in the system.
14.4 Operational problem – Leakage
Problem – Leak fluid side
Cause
1. Insufficiently tightened connections.
2. Cracked nut or connection.
3. Defective gasket or O-ring.
4. There is no overflow pipe connected to
the safety valve(s).
5. Filler valve between incoming cold water
and heating system not closed or leaking.
6. No condensation drain to heat pump's
drip tray.
7. Lack of condensation insulation on cold
water pipe and/or brine pipe.
8. Leak at soldered joints.
9. Leak at the condenser's drain cock.
10. Leak at the condenser's bleed valve.
11. Leak at soldered joint on water heater.
12. Associated leak on the water heater.
13. Associated leakage in the condenser.
48
Troubleshooting
Using manometer apparatus and thermom-
eter, check that the unit's overheating is
correct for the specific refrigerant.
Then check in the same way that the unit's
cooling is correct. See separate instructions
for cooling techniques.
Troubleshooting
Locate the leak.
Locate the leak.
Locate the leak.
Establish which safety valve does not have
an overflow pipe.
Check whether water continuously leaks
from the safety valve on the expansion ves-
sel on the hot side.
Check that condensation drain is installed
and correctly connected.
Establish where the condensation is coming
from.
Locate the leak.
1. Check that the valve is completely closed.
2. Check that the sealed cover is sealed.
Check that it is completely closed.
Locate the leak.
• Establish whether water continuously
leaks from the safety valve on the expan-
sion vessel on the hot side.
• Establish whether water continuously
leaks from the safety valve on the cold side.
• Check for lack of refrigerant in the unit.
• Check by smelling by safety valve on the
hot side, open the valve and check.
VMBME102
Remedy
If cooling is not at the correct level com-
pared with the specific refrigerant and is
too low, there is insufficient refrigerant
in the unit. Follow the correct procedure
(depending on type of refrigerant) to add
the correct amount of refrigerant.
If there appears to be a leak in the refriger-
ant circuit, carry out leak tracing and any
necessary corrective action. If leak tracer
is not available, brush soap water on the
suspected leak and look for bubbles. Also
check for oil as this can come out from the
refrigerant circuit.
Remedy
• Tighten the connection and check that it
is sealed
• If it is still not sealed, replace the entire
connection and support sleeve (only at soft
pipes)
Replace nut or connection.
Replace the gasket or O-ring.
Install an overflow pipe according to the
applicable norms.
Try closing the filler valve and see if water
stops dripping from the safety valve, if not,
replace the filler valve.
Install the condensation drain that runs out
into the floor drain.
The brine pipe must always be insulated.
In the event of problems with condensa-
tion on the cold water pipes, insulate them.
Condensation often accumulates in joints
and angled sections of the insulation.
Improve the insulation.
Drain the system of fluid, repair the leak. If
the leak is on the connection pipe to the
heat exchanger, also drain the refrigerant
side.
If the sealed cover is not sealed, replace the
sealed cover or the entire drain tap.
If it is fully closed and still leaks, replace it.
If there is a leak at the soldered joint,
replace the water heater.
If the water heater has a leak, replace it.
If the condenser has a leak, replace it.