seconds and the icemaker automatically stops. The control board will signal this problem using 7 beeps every 3 seconds.
The icemaker also automatically stops in cases of insufficient voltage (92Vac ± 5% or less). The control board will signal this problem using 6 beeps every 3 seconds.
When the proper supply voltage is resumed, the icemaker automatically starts running again.
f) LED Lights and Audible Alarm Safeties
The control board includes LED indicator lights, audible alarm safeties, and an output test feature. The “POWER OK” LED indicates control voltage and will remain on unless a control voltage problem occurs. The “POWER OK” LED flashes continuously when the bin is full and DV energizes for a maximum of 5 minutes to drain the water tank.
At startup, a 5 second delay occurs to stabilize the circuit. LEDs 4 through 8 energize and sequence from initial startup as listed in the table below. Note that the order of the LEDs from the outer edge of the board is 5, 6, 8, 9, 4, 7. For more information, see “2.
SEQUENCE OF OPERATION”.
Sequence Step | LED | Energized |
| Time LEDs are On | ||
Components | Min. | Max. | Avg. | |||
|
| |||||
1 Minute Fill Cycle | 8 | WV |
|
| 60 seconds | |
Harvest Cycle | 5, 6, 8 | WV, HGV, | 2 minutes | 20 minutes | 3 to 5 minutes | |
Comp | ||||||
Last 0, 10, 30, or 50 seconds (adjustable by dip switch) of harvest, WV
Comp, PM,
FMS
Comp, HGV,
DV, PM
The built in safeties shut down the unit and have alarms as listed below.
No. of Beeps | Type of Alarm | Notes | |
(every 3 sec.) | |||
|
| ||
| High Evaporator Temp. | Check for harvest problem (stuck HGV or | |
1 | (temperature > 127°F (53°C)) | relay), hot water entering unit, stuck HM, or | |
|
| shorted thermistor. | |
| Harvest Backup Timer | Check for open thermistor, HGV not | |
2 | (harvest > 20 min. for two | opening, TXV leaking by, low charge, | |
| cycles in a row) | inefficient Comp, or WRV leaking by. | |
| Freeze Timer | Check for a float switch stuck closed (up), | |
| (freeze > specified setting for | WV leaking by, HGV leaking by, PM not | |
3 | two cycles in a row) | pumping, TXV not feeding properly, low | |
| Timer is factory set using S1 | charge, or inefficient Comp. | |
| dip switch 9 & 10 |
|
To reset the above safeties, press the “ALARM RESET” button with the power supply on.
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