BERG DRYBERG RF, Operating And Maintenance Manual

Page: 38 / 42

H Compressor protection trips. H1 Compressed air flow or
temperature too high
combined with high ambient
temperatures. H1.1
• The head and the body of the
compressor are very hot;
• the compressor stops and
tries to restart after a short
time (even a few seconds)
Stop the unit and reduce the air
flow and temperature to within
rated limits. Wait a few minutes
before starting the unit again.
Use special attention to check
operation of the safety devices
present (thermal protections
incorporated in the motors and/
or external and high pressure
switch, if present).
In case of doubt, replace all the
devices.
H2 Compressed air flow or
temperature too high
together with insufficient
charge in refrigerant circuit
(see also
A9 ).
Call in a qualified refrigeration
engineer to check for leaks and
eliminate them.
Have the circuit charged by a
qualified refrigeration engineer.
Use special attention to check
operation of the safety devices
present (thermal protections
incorporated in the motors and/
or external and high pressure
switch, if present).
In case of doubt, replace all the
devices.
H3 See points G1 to G8 . Use special attention to check
operation of the safety devices
present (thermal protections
incorporated in the motors and/
or external and high pressure
switch, if present).
In case of doubt, replace all the
devices.
See also points from
G1 to G8 .
I Electronic board off even if
main power switch is on
(“I”). I1 Damaged circuit board. I1.1 Power on the circuit
board terminals. Renew circuit board (contact a
specialized service centre).
J Temperature probe fault
alarm (see heading 9.2
“Alarms table”). J1 Probe in open circuit or in
short circuit. J1.1
• Refrigerant compressor
stops;
• main alarm relay tripped
(if present on the controller
fitted on the unit, see
Chapter 7 “Electronic
controller
RF ”).
Check that the temperature
probe is correctly connected to
the control board terminals and
that the cable is undamaged.
If necessary replace the
temperature probe.
K Alarm relative to the
microprocessor or its
Eeprom memory
(see heading 9.2 “Alarms
table”). K1 Control board
microprocessor initialising
error or microprocessor
mistake in reading data. K1.1 The alarm signal relative
to the problem is
displayed on the
electronic board
(see heading 9.2 “Alarms
table”) and the unit is
blocked. Turn the unit off and on. If this
doesn’t solve the problem,
contact the nearest service
centre.
PROBLEM CAUSE SYMPTOM REMEDY