9
The green LEDs 1-4 represent the corresponding relays and energize and sequence
5 seconds from initial startup as follows:
{LED 1 – Comp; LED 2 - HGV/CFM; LED 3 – PM; LED 4 - WV}
The built in safeties shut down the unit and have alarms as follows:
The
Output Test
switch “S3” provides a relay sequence test. With power OFF, place S3
ON and switch power to ICE. The correct lighting sequence should be none, 2, 3, 4, 1, & 4,
normal sequence every 5 seconds. (The LEDs are not in numerical order on the board. See
the diagram on the next page for the location and numbering of LEDs). S3 should remain in
the “OFF” position for normal operation.
Min.
Max.
Avg.
1 Minute Fill Cycle 4
60 seconds
Harvest Cycle
1, 4, and 2
2 minutes
20 minutes
3 to 5 minutes
Freeze Cycle
1
5 minutes
60 minutes
30 to 35 minutes
Reverse Pump Out 1, 3, and 2
10 seconds 20 seconds factory setting
Time LEDs are Lit
LED
Sequence Step
No. of Beeps
(every 3 sec.)
Type of Alarm
Notes
1
High Evaporator Temp.
(temperature > 53°C)
Check for defrost problem (stuck HGV or
relay), hot water entering unit, stuck
headmaster, or shorted thermistor.
2
Defrost Backup Timer
(defrost > 20 min.)
Orange LED marked 20 MIN lights up.
Check for open thermistor, HGV not
opening, TXV leaking by, low charge, or
inefficient compressor.
3
Freeze Backup Timer
(freeze > 60 min.)
Yellow LED marked 60 MIN lights up.
Check for F/S stuck closed (up), WV
leaking by, HGV leaking by, TXV not
feeding properly, low charge, or
inefficient compressor.
6
Low Voltage
(92Vac or less)
7
High Voltage
(control voltage
> 147Vac ±5%)
Red LED will turn off if voltage protection
operates.
The voltage safety automatically resets
when voltage is corrected.
To manually reset the above safeties, press the white alarm reset button with the
power supply on.
