Checking the controller display temperature accuracy:
➢
After verifying the probe resistance to the box temperature, plug the probe into the controller and check the
temperature displayed
•
The controller should display the associated temperature of Table 1 above when compared to the
resistance measured
Note: the probe cannot be plugged into the controller when measuring resistance
➢
Fill a cup full of ice water (use a lot of ice), put the Ohm verified probe into the ice bath, stir for 1 minute.
Make sure to keep the probe in the center of the cup.
•
The controller should display 32°
Checking the controller compressor relay:
Does the controller relay open and close at the operating range specified on the data tag?
•
If the controller is calling for cooling, the compressor relay (terminals 8 & 9) will have continuity
Note: there is a 1 minute anti-short cycle delay programmed into the controller. The snowflake will
flash on the display indicating this delay. When the snowflake is solid, the controller is calling for
cooling and the relay will be closed.
Resetting the program to factory default settings:
➢
Hold the SET and DOWN ARROW for 3-4 seconds until the display changes and release; the display will
either read “rE” or “d2” and the °F symbol will be flashing. Immediately hold the SET and DOWN ARROW
for another 7-8 seconds until the display changes to L2, release the buttons and Hy will be displayed; this is
the controllers hidden menu where you can set the parameters of the chart below.
Note: The SET and DOWN ARROW must be pressed at the same time. If one is accidentally
released, the process will need to be restarted.
Note: If no keys are pressed, the hidden menu access will time out after 15 seconds and revert to
normal operation.
•
Use the arrow keys to scroll to the desired set point
•
Press set to access the value
•
Use the arrow keys to change the value
•
Press set again to lock in the value
The chart below represents the factory default settings of MFV, Beer, White and Red Wine controllers
Set the values to the associated product for the proper control of the unit
F-755-028
Rev. E
9/16/16
Label
Description
MFV
Beer
Wht Wine Red Wine
Label
Description
MFV
Beer
Wht Wine Red Wine
0-35
34-40
50-55
60-65
0-35
34-40
50-55
60-65
Regulation
Defrost
Hy
Differential
8
5
5
5
td
Defrost type
in
LS
Min Set Point
0
33
33
33
dE
Defrost Termination Temp
75
50
50
50
US
Max Set Point
35
65
65
65
id
Interval Between Defrost Cycles
4
6
6
6
ot
First Probe Calibration
0
0
0
0
Md
Max Length For Defrost
20
20
20
20
P2
Second Probe Presence
y
n
n
n
dd
Start Defrost Delay
0
oE
Second Probe Calibration
0
0
0
0
dF
Display During Defrost
dE
dE
dE
dE
od
Delay At Startup
0
0
0
0
dt
Drip Time
2
AC
Anti-short Cycle Delay
1
1
1
1
dP
Defrost at Power On
n
Cy Comp On Time Faulty Probe
5
5
5
5
Alarms
Cn
Comp Off Time Faulty Probe
8
5
5
5
AU
Max Temp Alarm
75
75
75
75
Display
AL
Min Temp Alarm
-15
25
25
25
CF
Units of Measure
Ad
Temp Alarm Delay
30
30
30
30
rE
in
in
in
in
dA
Exclusion Of Temp Alarm At Startup
99
99
99
99
Ld
Default Display
P1
P1
P1
P1
Other
dy
Display Delay
0
0
0
0
tb
tb
y
y
y
d1
Thermostat Probe Display
d2
Evap Probe Display
nP
nP
nP
Pt
Parameter Code Table
1
5
5
5
rL
Firmware Release
1.5
1.5
1.5
1.5
°F
°F
°F
°F
Resolution (For °C Only)
Reads
input
Reads
input
