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STATUS INDICATOR LIGHT BLINK SEQUENCE
Mode
Blink Time
Cooling
Off
Defrost
Error
Error Codes
•
One blink — Superheat sensor shorted or open
•
Two blinks — Room temperature sensor shorted or jumper not installed
•
Three blinks — Compressor discharge temperature sensor shorted
•
Four blinks — High compressor discharge temperature
•
Five blinks — Superheat too low
•
Six blinks — High pressure, oil pressure or low pressure cut-out
•
Seven blinks — Defrost Termination sensor shorted.
Note: See Table 2 for thermistor sensor resistance values at selected temperatures. To check a sensor,
place it in an ice bath (a cup with ice and water) and stir. The resistance should be 32,650 ohms at the 32 F
bath temperature.
Resistance of thermistor sensors at various temperatures.
Temperature F
104
86
77
68
59
50
41
EVAPORATOR FANS SHUT-DOWN BY OPERATORS
In some installations, a switch is provided which allows an operator to de-energize the evaporator fans while
loading the freezer or cooler box. This may cause the evaporator coil to freeze-up. The compressor can be
de-energized when the evaporator fan is de-energized, by wiring a 24V AC coil, double pole single throw
(DPST), relay into the fan circuit. This relay, R3, and the wiring is shown on the TYPICAL WIRING SCHE-
MATICS, in the back of this installation manual. For multiple evaporators, additional relays wired in parallel to
R3, to break the other fans, will be needed.
BEACON CONTROLLER
Off Time
2 sec.
2 sec.
1 sec.
7 sec.
1 sec.
1 sec.
8 fast
2 sec.
Ohms
Temperature F
5,320
8,060
10,000
12,490
15,710
19,900
25,400
Action
Faster blinks for superheat count, then repeat
Repeat
Repeat
Slower blinks for error code, then repeat
TABLE 2
32
23
14
5
-4
-13
130,410
-22
176,960
12
Ohms
32,650
42,330
55,330
72,950
97,070
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