Danfoss DHP-AX, Инструкция по установке и обслуживанию

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Service – 53 VMBMH302
Cause Troubleshooting Remedy
4. Overheating too high. Using manometer apparatus and ther-
mometer check what the overheating
reading of the unit is.
Also check that bulb and capillary tube
are undamaged and that the bulb is cor-
rectly installed.
If the overheating reading does not cor-
respond with the instructions for the
specific refrigerant, adjust the expansion
valve until the correct value is obtained.
See separate instructions for cooling
techniques.
If overheating cannot be adjusted with
the expansion valve or if the capillary
tube/bulb is damaged, replace it.
5. Lack of refrigerant, not enough
refrigerant in the system. Using manometer apparatus and ther-
mometer, check that the unit’s overhea-
ting is correct for the specific refrigerant. 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 refri-
gerant 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 bubb-
les. Also check for oil as this can come
out from the refrigerant circuit.
15.4.2 Leakage
Problem – Leak fluid side
Cause Troubleshooting Remedy
1. Insufficiently tightened con-
nections. Locate the leak. • 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)
2. Cracked nut or connection. Locate the leak. Replace nut or connection.
3. Defective gasket or O-ring. Locate the leak. Replace the gasket or O-ring.
4. There is no overflow pipe con-
nected to the safety valve(s). Establish which safety valve does not
have an overflow pipe. Install an overflow pipe according to the
applicable norms.
5. Filler valve between incoming
cold water and heating system
not closed or leaking. Check whether water continuously leaks
from the safety valve on the expansion
vessel on the hot side. Try closing the filler valve and see if water
stops dripping from the safety valve, if
not, replace the filler valve.
6. No condensation drain to heat
pump’s drip tray. Check that condensation drain is instal-
led and correctly connected. Install the condensation drain that runs
out into the floor drain.
7. Lack of condensation insula-
tion on cold water pipe and/or
brine pipe. Establish where the condensation is
coming from. The brine pipe must always be insulated.
In the event of problems with conden-
sation on the cold water pipes, insulate
them. Condensation often accumulates
in joints and angled sections of the insu-
lation. Improve the insulation.
8. Leak at soldered joints. Locate the leak. Drain the system of fluid, repair the leak.
If the leak is on the connection pipe to
the heat exchanger, also drain the refri-
gerant side.
9. Leak at the condenser’s drain
cock. 1. Check that the valve is completely
closed.
2. Check that the sealed cover is sealed.
If the sealed cover is not sealed, replace
the sealed cover or the entire drain tap.
10. Leak at the condenser’s bleed
valve. Check that it is completely closed. If it is fully closed and still leaks, replace
it.