User Guide & Service Manual
USER GUIDE
 Control Operation - Service 4
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SAFETY • INSTALLATION & INTEGRATION • OPERATING INSTRUCTIONS • MAINTENANCE • SERVICE
13. ADJUST DEFROST DURATION — 0 TO 99 
MINUTES
The length of the defrost can be adjusted 0 to 99 
minutes long. The other defrost parameters still 
apply. Lengthening a defrost may cause higher 
than normal temperatures in the refrigerator 
section.
14. VIEW ERROR LOG
A list of the errors in the order they occurred will 
scroll once on the display. All errors are logged 
in memory. Only door error is displayed on the 
display and has an audible signal.
 E0:
 Door 1 (upper) open.
E1: Thermistor 1 open.
E2: Thermistor 2 open.
E3: Thermistor 3 open.
E4: Thermistor 4 open (Does not apply to this model).
E5: Thermistor 1 shorted.
E6: Thermistor 2 shorted.
E7: Thermistor 3 shorted.
E8: Thermistor 4 shorted (Does not apply to this 
model).
E9: Door 2 (lower) open.
P1: Pump Circuit open (Does not apply to this 
model).
15. CLEAR ERROR LOG
To clear errors, press and hold
   (5 seconds) 
when CLR is flashing.  
16. THERMISTOR — 1 DIFFERENTIAL
This number should not be adjusted.
17. EVAPORATOR FAN DELAY IN MINUTES — 
ON
“Fan Delay On” is the amount of time in minutes 
the fan will be delayed from starting from the 
beginning of a cooling cycle. Adjustable 0-99 
minutes.
18. EVAPORATOR FAN DELAY IN MINUTES — 
OFF
“Fan Delay Off” is the amount of time in minutes 
the fan will continue to run at the end of a 
cooling cycle. Adjustable 0-99 minutes.
19. INDIVIDUAL COMPONENT TOGGLE
20. MODEL NUMBER INDICATOR
Displays the two-digit model number of the  
specific unit. See model list table.
21. LIGHT ALL LED SEGMENTS
This will illuminate all the LEDs on the display to 
ensure they work properly.
22. VIEW DEFROST CYCLES
Displays the number of defrosts that have 
occurred in the past 24 hours.
23. VIEW COMPRESSOR RUNTIME 
This will show the number of minutes the   
compressor has run in the prior cycle (or   
current cycle if the compressor was running 
when service mode was entered).
24. ACTIVATE DEFROST/HARVEST
Turns on the hot gas bypass valve allowing hot 
gas to circulate through the evaporator causing 
frost to melt.
25. RESTORE FACTORY DEFAULTS
Will restore all adjustable functions to their  
factory settings.
26. SOFTWARE VERSION — MAIN BOARD
Displays software version of the main control 
board.
  Display #  Relay/Output
  0   Exit
  2  Relay 2
  3   Relay 3
  4  Relay 4
  5  Relay 5
  6  Relay 6
7  Relay 7
8  DC Output 1 
9 DC Output 2
10  DC Output 3
11  DC Output 4
12  DC Output 5
SEE RELAY/OUTPUT CHART
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