Danfoss DHP-AX, Инструкция по установке и обслуживанию

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Service – 57 VMBMH302
Cause Troubleshooting Remedy
10. Heat loss in the hot water
pipe. Open the hot water tap, read off the tem-
perature on the outgoing hot water pipe
from the heat pump and the temperature
of the hot water. The temperature diffe-
rence measured between the heat pump
and hot water indicates the temperature
loss.
Examples of temperature loss causes:
• Long water pipes.
• Uninsulated hot water pipes.
• Hot water pipes routed through cold
areas.
Other causes that can affect the hot
water temperature:
• Is a mixer valve installed in the system?
Temperature set too low on the mixer
valve? Leaking mixer valve?
• Water tap fault? Leaking thermostat
mixer?
If any problems occur during trou-
bleshooting as per the points, carry out
corrective actions.
To quickly check that the heat pump’s
hot water production works as it should,
drain the hot water so that the heat
pump starts to produce the hot water.
When done, read off the temperature on
the top sensor and on the start sensor.
The top sensor should show a temperatu-
re of around 50-55°C and the start sensor
around 45-48°C. If, after completed hot
water production, these temperatures are
obtained, this means that you have the
correct temperature and volume of hot
water in the water heater.
15.4.5 Heating comfort
Problem – Too cold
Cause Troubleshooting Remedy
1. The heat pump’s control com-
puter is not set/adjusted to the
customer’s requirements/wishes. Check the ROOM and CURVE and MAX
settings. Adjust incorrect values in the heat
pump’s control computer.
ROOM = Desired indoor temperature
CURVE = Should be set so that the
desired indoor temperature (ROOM) is
maintained regardless of the outdoor
temperature.
MAX = Highest set-point value on the
supply line regardless of the outdoor
temperature.
2. Incorrect operating mode set
in the heat pump’s control com-
puter. Check which operating mode is set. If the incorrect operating mode is set,
change to the desired operating mode.
3. Sensor fault, OUTDOOR/
ROOM/SUPPLY LINE/RETURN
LINE. Check what the relevant sensor shows, is
it a plausible/actual value?
Measure the resistance of the sensor,
check against the ohm table in section
15.3 Measurement points .
If the sensor is defective, replace it.
4. The 3-way valve has jammed
in hot water mode. 1. Check the function of the 3-way valve
motor by test running it manually. If
the motor does not shift mode during
manual test operation, check that there is
voltage to the motor, see wiring diagram.
2. Detach the motor and test closing and
opening of the valve by pressing the
control arm.
1. Is the motor being supplied with vol-
tage according to the wiring diagram in
both operating instances?
MANUAL TEST – REV.V. HOT WATER
0=Radiator mode, arm out from valve.
1=Hot water mode, arm positioned
towards the valve.
If there is voltage to the motor but the
arm does not shift mode, replace it.
2. Take out and clean the jammed insert,
or replace with a new insert.
5. Defective electric heating
element. Use a buzzer and check if all coils in the
electric heating element are intact. If the electric heating element is defec-
tive, replace it.