P
arameters :
Parameter Setting Range Default MR12 MR15
Temperature control parameters
Setpoint -40 to 70°C
••
Hy
Hysteresis (HY) 1 to 9 K 2
••
LL
Lower setpoint limit (LL) -40°C to higher limit -40
••
HL
Higher setpoint limit (HL) lower limit to 70°C 70
••
CC
Anti short cycling (CC) 0 to 9 min 2
••
Co
Deep freezing time (Co) 0 to 99 min 60
••
Alarm parameters
AH
High. temperature alarm 0 to 50°C related to setpoint 10
••
AL
Low temperature alarm -50 to 0°C related to setpoint -10
••
Ad
Alarm differential 1 to 9 K 1
••
At
Alarm time delay 0 to 99 min 30
••
Defrost parameters
dF
Defrost function 0 = Electric heater
1 = Hot gas
0
•
dE
Defrost end function 0= by time
1= by temperature
1
•
dt
Defrost termination temp 0 to 20°C 7
•
di
Defrost interval time 0 to 99 hours 6
••
dd
Max. defrost duration 0 to 99 min 40
••
dC
Dripping time 0 to 99 min 5
••
dU
First defrost after power on OFF, 0 to 99 min OF
••
dP
Display during defrost 0 = Last value before defrost
1 = Set point
0
••
dr
Delay displayed temp after defrost 1 to 99 min 20
••
Digital input parameters
iF
Digital input function 0 = Instrument OFF
1 = Alarm signalling
2 = Alarm reset
3 = Alarm reset and fan cut-off
0
••
id
Digital input time delay 0 to 99 sec 5
••
Fan control parameters
FF
Fan operating function 0 = Parallel with compressor
1 = Continuous running
0
•
Fd
Fan start-up delay after defrost end 0 to 99 min. 5
•
Fr
Fan start-up temperature after defrost
end
-30 to +5 °C/-22 to 41°F 2
•
Other parameters
SF
Thermostat operating function when
sensor failure
0 = Always ON
1 = Always OFF
2 = Automatic
0
••
So
Offset thermostat sensor -20 to +20 units 0
••
Un
Temperature units 0 = °C
1 = °F
0
••
PU
Display updating time delay 1 to 99 sec 1
••
12 CR1
Catalogue Section 9 © 2000 Johnson Controls, Inc.
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