Check Circuit Board; Green Board Diagnostics; Erratic Component Operation - Cornelius I-SERIES Training Manual

I-Series Ice Machine Training Manual
G B
4.9
REEN

Erratic Component Operation

Erratic component operation (water pump, condenser fan, hot gas valve, etc.) are
often the result of a poor connection to the 8-pin connector. Before performing diag-
nostics on the circuit board, make sure the 8-pin connector is securely in place.

Check Circuit Board

1. Turn the power switch ON. The D-5 Error-LED indicator will be illuminated for
2 seconds.
2. After the D-5 Error-LED goes out, momentarily short across the bottom two ter-
minals out of the test plug with a jumper wire or screwdriver. Then remove the
jumper. The circuit board is now in test mode.
3. One of these two conditions will exist:
• If the ice thickness potentiometer is within the factory setting, the Error-LED
will flash continuously.
• If the ice thickness potentiometer is not within the factory setting, the Error-
LED will not be lit.
4. In either case, the green LED indicators will illuminate for 2 seconds in the
sequence shown below. They will continue to sequence until the power is turned
off. Failure of the green LEDs to cycle in this sequence indicates a defective cir-
cuit board. Replace the board.
Status Indicators
D6
D11
D12
D14
D15
- 28 -
Diagnostics
OARD
Green LED
Green LED
Green LED
Green LED
Green LED
Fan
Hot gas valve(s)
Water pump
Contactor
Dump valve
© 2001, IMI Cornelius Inc.