Manitowoc J-1300, Руководство по обслуживанию

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Section 6 Electrical System
6-37
Check Procedure
1. Set the toggle switch to OFF.
2. Watch the bin switch light on the control board.
3. Move the water curtain toward the evaporator.
The bin switch must close. The bin switch light
“on” indicates the bin switch has closed properly.
4. Move the water curtain away from the evaporator.
The bin switch must open. The bin switch light
“off” indicates the bin switch has opened
properly.
Ohm Test
1. Disconnect the bin switch wires to isolate the bin
switch from the control board.
2. Connect an ohmmeter to the disconnected bin
switch wires. Set the ohmmeter to the 10,000 ohm
scale.
3. Cycle the bin switch by opening and closing the
water curtain.
4. With the bin switch open: Resistance readings of
more than 30,000 ohms indicate a correctly
operating bin switch.
5. With the bin switch closed: Resistance readings
of less than 70 ohms indicates a correctly
operating bin switch.
Important
Any reading between 70 and 30,000 ohms,
regardless of curtain position, indicates a defective
bin switch
Bin Switch Resistance Readings
Water Curtain Removal
Notes
The water curtain must be on (bin switch closed) to
start ice making. While a freeze cycle is in progress,
the water curtain can be removed and installed at any
time without interfering with the electrical control
sequence.
If the ice machine goes into harvest sequence while
the water curtain is removed, one of the following
will happen:
•
Water curtain remains off
When the harvest cycle time reaches 3.5 minutes
and the bin switch is not closed, the ice machine
stops as though the bin were full.
•
Water curtain is put back on
If the bin switch closes prior to reaching the 3.5
minute point, the ice machine immediately returns
to another freeze sequence prechill.
0 OHMS
GOOD
GOOD
70 OHMS
SWITCH CLOSED
30,000 OHMS
SWITCH OPEN
INFINITE
OHMS
METER
READS
(OL)
BAD