S1800 Marine Model Ice Machines – Service Manual - Manitowoc Ice
S1800 Marine Model Ice Machines – Service Manual - Manitowoc Ice
S1800 Marine Model Ice Machines – Service Manual - Manitowoc Ice
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Section 6 Electrical System<br />
General<br />
S-<strong>Model</strong> control boards use a dual voltage transformer.<br />
This means only one control board is needed for both<br />
115V and 208-230V use.<br />
Safety Limits<br />
In addition to standard safety controls, such as the high<br />
pressure cut-out, the control board has built-in safety<br />
limits.<br />
These safety limits protect the ice machine from major<br />
component failures. For more information, see “Safety<br />
Limits” in Section 7.<br />
Inputs<br />
The control board, along with inputs, controls all<br />
electrical components, including the ice machine<br />
sequence of operation. Prior to diagnosing, you must<br />
understand how the inputs affect the control board<br />
operation.<br />
Refer to specific component specifications (inputs),<br />
wiring diagrams and ice machine sequence of operation<br />
sections for details.<br />
As an example, refer to “<strong>Ice</strong> Thickness Probe” on the<br />
next page for information relating to how the probe and<br />
control board function together.<br />
This section will include items such as:<br />
• How a harvest cycle is initiated<br />
• How the harvest light functions with the probe<br />
• Freeze time lock-in feature<br />
• Maximum freeze time<br />
• Diagnosing ice thickness control circuitry<br />
Part Number 80-1634-3 6-21
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