Displaying messages
Note
If a message was issued, initially determine the cause for the fault and remove
it. Returning the unit into use is only permissible for troubleshooting.
The unit must not be returned into use several times if a fault persists.
Code Description Possible cause Measures
E01 High pres-
sure fault
Air heat exchanger con-
taminated
Clean the air heat exchan-
ger
Incorrectly calibrated high
pressure switch
Recalibrate the high pres-
sure switch
Excessive cooling load
(system incorrectly sized)
Check the system sizing
Fan faulty Check the fan and electrical
connections
Inadequate throughput in-
side the hydraulic circuit
(in heating mode)
Clean the water filter and in-
crease the heating water
throughput, if required
E02 Low pres-
sure fault
(automatic
reset up to
twice per
hour)
Inadequate throughput in-
side the hydraulic circuit
Clean the water filter; in-
crease the water through-
put, if required
Air heat exchanger con-
taminated
Clean the air heat exchan-
ger
Filter dryer blocked Replace the filter dryer
E05 Frost protec-
tion (auto-
matic reset
up to twice
per hour)
Inadequate throughput in-
side the hydraulic circuit
Clean the water filter; in-
crease the water through-
put, if required
E06 Sensor ST2
(flow) faulty
Short circuit, lead break or
sensor limits exceeded.
Check sensor and replace, if
required
E07 Sensor ST3
(at the air
heat exchan-
ger) faulty
Short circuit, lead break or
sensor limits exceeded.
Check sensor and replace, if
required
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