UMT/WG T MT Rev3.0 – 08/10/2021 Pag. 29-EN
controller and PSD (Inverter for
compressor BLDC)
Power+ inverter alarm.
Generic Alarm of the PSD (LT/MT
compressor). More details about
the alarm code of the inverter is
reported in the same mask.
Compressor start failure.
Delta Pressure between suction and
discharge does not increase after
the compressor start
Compressor shut off.
Compressor restarts after a
delay if this alrm does not
occur more than 5 times in
60 minutes
Automatic/
manual (if
it occurs
more than
5 times in
60
minutes)
Envelope alarm.
Compressor is working out of
admitted envelope. The current
operating zone is reported in the
same mask
High discharge gas temperature.
Discharge temperature measured
by the probe is higher than the
Alarm threshold set on mask Hb02
Compressor Low pressure
differential (insufficient lubrication).
Low delta pressure between suction
pressure and discharge pressure
Settable
by mask
mask
Cag55
Inverter model not compatible
(Power+ only allowed).
The inverter model is not
compatible with the compressor
size configured on mask Cag12
Compressor does not start
Store number: !! OFFLINE !!
Store number: Low temperature
alarm [Generic Probe 1]
Display only (refer to
MPXPRO / Ultracella user
manual)
Store number: High temperature
alarm [Generic Probe 1]
Display only (refer to
MPXPRO / Ultracella user
manual)
Store number: Low temperature
alarm [Generic Probe 2]
Display only (refer to
MPXPRO / Ultracella user
manual)
Store number: High temperature
alarm [Generic Probe 2]
Display only (refer to
MPXPRO / Ultracella user
manual)
Store number: Defrost timeout
Display only (refer to
MPXPRO / Ultracella user
manual)
Store number: Low superheat
alarm
Display only (refer to
MPXPRO / Ultracella user
manual)
Store number: Low suction
temp.alarm
Display only (refer to
MPXPRO / Ultracella user
manual)