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problem occurs. At startup a 5 second delay occurs while the board conducts an internal
timer check. A short beep occurs when the power switch is turned ON or OFF.
The green LED’s 1-4 represent the corresponding relays and energize and sequence 5
seconds from initial startup as follows:
Sequence Step
LED’s on Length:
Min.
Max.
Avg.
1 Minute Fill Cycle
LED4
60 sec.
Harvest Cycle
LED1, 4, & 2
2 min.
20 min.
3-5 min.
Freeze Cycle
LED1
5 min.
60 min.
30-35 min.
Reverse Pump Out
LED1, 3, & 2
10 sec.
20 sec.
Factory set.
{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:
1 beep
every 3 sec. =
High Evaporator Temperature
>127 ° F.
Check
for defrost problem (stuck HGV or relay), hot water entering unit, stuck headmas-
ter, or shorted thermistor.
2 beeps
every 3 sec. =
Defrost Back Up Timer
. Defrost >20 minutes.
Orange LED marked 20 MIN energizes.
Check
for open thermistor, HGV not opening, TXV leaking by, low charge, or inefficient
compressor.
3 beeps
every 3 sec. =
Freeze Back Up Timer
. Freeze > 60 minutes.
Yellow LED marked 60 MIN energizes.
Check
for F/S stuck closed (up), WV leaking by, HGV leaking by, TXV not feeding prop-
erly, low charge, or inefficient compressor.
To manually reset the above safeties, depress white alarm reset button with the power
supply ON.
6 beeps
every 3 sec. =
Low Voltage
. Voltage is 92 Vac or less.
7 beeps
every 3 sec. =
High Voltage
. Control voltage > 147Vac ±5%.
The red LED will de-energize if voltage protection operates.
The voltage safety automatically resets when voltage is corrected.
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. S3 should remain in the “OFF” position for normal
operation.
The application switch located between relay X3 & X4 must be set to match the original
board application. Place this switch in the ALP position if there is no white wire supplied
