Service manual
43
Installation and Service Manual
COMPONENT DIAGNOSTICS
HALL SWITCH CHECK PROCEDURE 4 RELAY CIRCUIT BOARD
NOTE: The Hall switch can only be used on a four
relay board. When used on a four relay board,
the sleeve jumper must be set to Hall opera-
tion. Switch damage may result in teh prox-
imity switch position.
The Hall switch will serve the same basic function
as the proximity switch on the 3 relay control board, with
the following exceptions:
A) No LED in switch - LED (LED is Amber) is lo-
cated on the circuit board.
B) Switch requires a "S" pole magnet to turn on,
not a metal target. The "S" pole magnet is
mounted in teh side wall of the water curtain.
NOTE: Opening and closing the water curtain should
cause the curtain LED on the control board
to be "on" with the curtain closed and "off"
with the curtain open. Failure to function as
described proceed:
1. Check incoming voltage. Voltage between cir-
cuit board terminals L1 and L2 must be within
the voltage stated on the machine name plate.
2. Sleeve jumper on control board must be set for
Hall switch - see circuit board diagram.
3. Place the power toggle switch in the ice making
mode. (Power LED light on)
4. Check to see switch is wired correctly on control board:
RED =(+)
GREEN =(N/C)
BLACK =(-)
5. Disconnect the red, green and black leads of
Hall switch from control board.
6. Measure the DC voltage between (+) and (-) on
control board:
A) Voltage must be between 12 - 24 VDC.
B) If voltage is below 12 VDC, replace control
board
C) If voltage is above 24 VDC, replace both the
control board and the Hall switch.
7. Place a jumper across terminals (-) and (N/C).
The curtain LED on the control board should turn
"on" and the freeze mode should begin. Failure
of the LED to turn "on", replace the control board.
8. Remove jumper across terminals (-) and (N/C)
and place the jumper across terminals (+) and
(N/C) curtain LED should turn "off". Failure of
LED to turn off replace control board.
9. If control board has proper voltage (12 - 24 VDC)
and functions per #7 and #8 above, replace Hall
switch.