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Operation and maintenance
NEW EcoHeater
DSEH200301.01.EN
Continuous product development may give rise to specification changes without notice.
7.2 Troubleshooting via symptoms and status message
Status information is read on the Climatix display.
(Main menu > Unit > Heat pump > Status heat pump).
Symptom
Status
message
Possible cause
Corrective action
The compres-
sor speed
drops
HiPress
1. Insufficient water flow through the
heat pump.
1. Adjust the water flow.
2. High return water temperature to the
heat pump.
2. Check the incoming water
temperature.
FrostTemp
The compressor speed is limited to pre-
vent frost formation on the heat reco-
very coil.
Normal condition when the ex-
tract airflow is not high enough
to run the compressor at maxi-
mum power.
Compressor
does not start
OFFbyKey
Menu in Carel ” On/Off Unit” is not set
to ON
Set to ON.
OFFbyDIN
Interlock from Climatix missing.
Move CHANGEOVER SWITCH
SERVICE to “Auto”.
UnitOn
1. The demand indicator is lower than
10% (menu in Climatix “Heat de-
mand”).
1. Check external control
0 – 10 VDC, heat curve and
temperature sensor outdoor
air.
2. The start delay for the compressor
has not counted down to 0.
2. Wait or jump start.
FrostTemp
1. The difference between the return air
temperature and extract air tempera-
ture is greater than 3°C (menu “End
defrostdiff”).
1a. Wait until the exhaust air
temperature has risen to the
starting level.
1b. Jump start.
2. The exhaust air temperature is lo-
wer than 12°C (menu “End temp min
freq:”).
2. Wait for the exhaust air
temperature to rise.
3. The compressor has stopped due
to the evaporating temperature
or exhaust air temperature having
fallen below its respective minimum
temperature at the compressor’s
lowest possible speed.
3. Check that the air flow is not
too low.
Low water flow Insufficient water flow through the com-
pressor.
1. Check that the circulation
pump heat pump CP1 is
running.
2. Check that the water flow is
in the correct direction.
