Hot Water Problems; Leakage Problems - Danfoss DHP-H Installation And Service Instructions Manual

The temperature in the house oscillates between hot and cold
Cause
Adjusting - trimming
Operating conditions
curve
Curve adjustment
"buckling"
15 .6 Hot water problems
Temperature and hot water volume too low
Cause
Pressure too high on
incoming cold water
3-way valve motor not
working
Jammed 3-way valve
insert
Air in TWS coil or water
heater
Water heater too small
Start temp. of hot water
too high
15 .7 Leakage problems
Water side
Cause
Defective gasket or O-
ring
Poorly tightened connec-
tions
Cracked nut or connec-
tion
Leak at soldered joints
Leak at soldered joint on
water heater
There is no overflow pipe
connected to the safety
valve(s).
No condensation hose to
heat pump's drip tray
Poor condensation insu-
lation, cold water pipe
and brine pipe
Troubleshooting
Curve buckling at different outdoor temperatures.
Positioning room sensors and outdoor sensors.
Operating condition Auto / HP / AH in combination with
incorrect curve.
House performance.
Troubleshooting
Check the water pressure.
Check the function of the 3-way valve by test running it
manually.
Check that the start temperature is correctly set. Must/
should not be set above factory setting.
Troubleshooting
Locate the leak.
Locate the leak.
Locate the leak.
Locate the leak.
Establish which safety valve does not have an overflow
pipe.
Establish where the condensation is coming from.
Check that the room sensor is posi-
tioned in a suitable place that is repre-
sentative of the building.
Check that the outdoor sensor is
installed according to the instructions.
Install pressure reduction valve in the
system.
If the motor is defective, replace it.
Take out and clean the insert, or
replace with a new insert.
Bleed the system (see separate
instructions).
Replace with a larger water heater or
supplement with electric heater.
Replace the gasket or O-ring
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
Drain the system of fluid, repair the
leak. If the leak is on the connection
pipe to the exchanger, also drain the
refrigerant side.
Replace the hot water heater
Install an overflow pipe according to
the applicable norms.
Install the drain hose that runs out
into the floor drain.
In the event of problems on the
cold water pipes, insulate them.
Condensation often accumulates in
joints and angled sections of the insu-
lation. Improve the insulation.
VMBMA102
Remedy
Remedy
Remedy