Manitowoc Ice S1800 service manual Safety Limits, Inputs

Section 6 Electrical System

General

S-Model control boards use a dual voltage transformer. This means only one control board is needed for both 115V and 208-230V use.

Safety Limits

In addition to standard safety controls, such as the high pressure cut-out, the control board has built-in safety limits.

These safety limits protect the ice machine from major component failures. For more information, see “Safety Limits” in Section 7.

Inputs

The control board, along with inputs, controls all electrical components, including the ice machine sequence of operation. Prior to diagnosing, you must understand how the inputs affect the control board operation.

Refer to specific component specifications (inputs), wiring diagrams and ice machine sequence of operation sections for details.

As an example, refer to “Ice Thickness Probe” on the next page for information relating to how the probe and control board function together.

This section will include items such as:

•How a harvest cycle is initiated

•How the harvest light functions with the probe

•Freeze time lock-in feature

•Maximum freeze time

•Diagnosing ice thickness control circuitry

Part Number 80-1634-3 6-21