Manitowoc Ice QF2300, QF0800 Section, Electrical System, 6-53, CONTROL BOARD RELAYS Function

Section 6 Electrical System

CONTROL BOARD RELAYS

Function

The control board relays energize and de-energize system components.

Specifications

Relays are not field replaceable. There are four relays on the control board:

Relay	Controls
#1	Contactor Coil
#2	Water Dump Valve
#3	Gear Motor
#4	Float Valve Coil

Check Procedure

1.Leave all wiring connected and refer to the Energized Parts Chart. Then verify:

A.The relay should be energized.

B.The red control board LED is energized for the relay contacts being tested.

2.Check for line voltage at the control board.

A.Insert one electrical test lead to test L2 (wire #22).

B.Insert one electrical test lead to test for voltage through the contacts.

MAIN FUSE

Function

The control board fuse stops ice machine operation if electrical components fail, causing high amp draw.

Specifications

The main fuse is 250 Volt, 10 amp.

Check Procedure

!Warning

High (line) voltage is applied to the control board (terminals #21 and #22) at all times. Removing the control board fuse or moving the toggle switch to OFF will not remove the power supplied to the control board.

1.If any control board lights are energized, the fuse is good.

!Warning

Disconnect electrical power to the entire ice machine before proceeding.

2.Remove the fuse. Check the resistance across the fuse with an ohm meter.

Reading	Result
Open (OL)	Replace fuse.
Closed (O)	Fuse is good.

INSERT

TEST LEAD.

RELAY

CONTACTS

L2	WIRE
WIRE #22	#90

INSERT

TEST LEAD.

Voltage Reading	Result
Line Voltage*	Relay is good.
No Voltage	Relay is defective.
	Replace control board.

*Refer to model/serial label for correct voltage.

Part No. 80-1214-3 Revised 8/2003 6-53