Zanotti Zer0 120, Руководство по ремонту

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5.3 TROUBLESHOOTING BY ALARM CODE
Icon Alarm Description Possible causes Possible remedies
PrL
PMI
Low-
pressure
Following a signal from the low-
pressure switch , the display
shows the led alarm and
error code PRl(PrL).
When the correct pressure
value is restored, the unit
restarts automatically.
If there are multiple signals, the
alarm PMI(PMI) is displayed
which stops the unit completely
- Refrigerant leakage
- Evaporator packaged
of ice
- Failure of evaporator
fans
- Outside temperature
very low (<32°F)
- Perform a manual
defrost and ensure
that the evaporator is
clean and free of ice
- Confirm the correct
operation of the
evaporator fans
PrH
PMS
High-
pressure
Following a signal from the
high-pressure switch , the
display shows the led alarm
and error code PRh(Prh).
When the correct pressure
value is restored, the unit
restarts automatically.
If there are multiple signals, the
alarm PMS(PMS), is displayed
which stops the unit
completely.
- Failure of condenser
fans
- Dirty condenser of
insufficient air flow
- Moisture in the circuit
- Clean the condenser
- Check the
condenser fan
- Check if there are
no obstacles in front
of the condenser
such as to obstruct
the proper air flow
F1t
FtB
Electric
motor
protection
(only for
stand- by
mode units)
Following a signal from the
electric motor protection, the
display shows the led alarm
and error code F1t(F1t).
When the correct pressure
value is restored, the unit
restarts automatically
If there are multiple signals, the
alarm ftb(Ftb), is displayed
which stops the unit completely
- Stand-by motor
defective
- Low supply voltage
- Power source too far
from the unit
- CPR valve set
incorrectly
- Check if the voltage
is correct
- Check if there is a
short circuit in the
stand-by motor
- Check the
parameter setting of
the thermal overload
relay
E01
Probe failure
The display show E01(E01) the
led alarm
-
Temperature probe
defective or not
properly connected
-
Check the probe
connection