2/20 Rev. A 57-02694
15
LIST OF PARAMETERS
Here is a list of the parameters the value of which can be changed in the programming mode, as well as
their ranges.
Display
Symbol
Description
Range
Factory’s
Setting
SEt
Temperature set point
-17 to 32°F
-10
°
F
Hy
Cut-out temperature is Set + Hy, Differential
1 to 45°F
10
°
F
AU
High temperature alarm is enabled after a delay
45°F
45
°
F
AL
Low temperaturealarm is enabled after a delay
-30°F
30
°
F
Ad
Alarm delay
0 to 255 min
30min
ALARM SIGNALS
Message
Cause
Outputs
“P1”
Room probe failure
Compressor output according to par. “Con” and “COF”
“P2”
Evaporator probe failure
Defrost end is timed
“HA”
Maximum temperature alarm
Outputs unchanged.
“LA”
Minimum temperature alarm
Outputs unchanged.
“dA”
Door open
Compressor and fans restarts
“EA”
External Alarm
Output unchanged
“CA”
Serious External alarm(i1F=bAL)
All output off
“CA”
Pressure switch alarm (i1F=PAL)
Outputs unchanged.
NOTE:
Probe alarms “
P1
” and “
P2
” start some seconds after the fault in the related probe; they
automatically stop some seconds after the probe restarts normal operation. Check connections
before replacing the probe.
Temperature alarms “
HA
” and “
LA
” automatically stop as soon as the thermostat temperature
returns to normal values and when defrost starts.
ELECTRICAL CONNECTIONS
The controller is provided with screw terminal block or male terminals to connect cables with a cross section up to 2,5
mm
2
. Before connecting cables make sure the power supply complies with the control’s requirements. Separate the
probe cables from the power supply cables, from the outputs and the power connections. Do not exceed the
maximum current allowed on each relay, in case of heavier loads use a suitable external relay.
PROBE CONNECTIONS
The probes shall be mounted with the bulb upwards to prevent damages due to casual liquid infiltration. It is
recommended to place the thermostat probe away from air streams to correctly measure the average room
temperature. Place the defrost termination probe among the evaporator fins in the coldest place, where most ice is
formed, far from heaters or from the warmest place during defrost, to prevent premature defrost termination.
Summary of Contents for MBGFP-HG
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