Manitowoc Ice FLAKE/CHIPLET QF0400 - Manual (Page 115)

Section 6 Electrical System
Part No. 80-1214-3 6-53
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:
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
1. If any control board lights are energized, the fuse is
good.
2. Remove the fuse. Check the resistance across the
fuse with an ohm meter.
Relay Controls
#1 Contactor Coil
#2 Water Dump Valve
#3 Gear Motor
#4 Float Valve Coil
Voltage Reading Result
Line Voltage* Relay is good.
No Voltage
Relay is defective.
Replace control board.
*Refer to model/serial label for correct voltage.
INSERT
TEST LEAD.
RELAY
CONTACTS
WIRE
#90
L2
WIRE #22
INSERT
TEST LEAD.
! 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.
!
Warning
Disconnect electrical power to the entire ice machine
before proceeding.
Reading Result
Open (OL) Replace fuse.
Closed (O) Fuse is good.
Revised 8/2003