L22-236 Rev 0 (04/03)
6
Note:
When the controller is on, the pilot should
always remain lit.
Relay Board:
Note:
J connectors are marked on the relay board.
•With 24 VAC supplied to pin #2 at connector J35 and a
good F1 fuse, the relay board will have a 24 VAC output
at pin #2 on connectors J33 and J34 and the A.C. indi-
cator will be illuminated.
Note: The fryer is equipped with a computer con-
troller, at connection J33 there will be a jumper from
pin #2 to pin #10 to supply 24 VAC to pin # 2 at
connection J31 to supply the controller with 24VAC.
•When the board receives a 24 VDC side on input at pin
#7 on connectors J31 or J33, the S.O. indicator will illu-
minate, the side on relay (S.O.) will energize and there
will be a 24 VAC output at pin #4 on connector J32.
•When the board receives a 24 VDC heat demand input
at pin #6 on connectors J31 or J33, the H.D. indicator
will illuminate, the heat demand relay (H.D.) will energize
and there will be continuity between pin #1 and pin #2 at
connector J32.
Computer Control:
Note:
All controller test points are at connector P/J1 (clos-
est connector to the controller).
•With 24 VAC supplied to pin #1(24VAC supply) and
pin # 5(24VAC input from DVI), the display should read
"OFF".
•With the controller turned on, there will be a 24 VDC
output at pin #9 (side on).
•When the controller calls for heat, there will be a 24
VDC output at pin #8 (heat demand) and a 24 VAC in-
put at pin #6 (heat feed back). If the controller does not
receive the 24 VAC input at pin #6 in approximately 90
seconds, the controller will display "HEAT FAIL" or "IG-
NITION FAILURE". This would indicate a break in the
heat demand or heat feed back circuit.
1. Check the hi-limit switch (is it open or tripped).
2. Check the ignition module (sensing pilot flame,
locked out, 24 VAC at MV terminal).
3. Check the heat demand relay (H.D.) on the relay
board (is heat demand relay energized, continuity
through COM and NO contacts).
•If display reads "PROBE OP" "OPEN", ohm test the
temperature probe. Check the wires and connectors be-
tween the probe and controller for continuity.
•If display reads "SYSTEM" "FAILURE", test the tem-
perature probe and the wires and connectors between the
probe and controller for a short.
•If display reads "DRAINING" "TURN OFF", verify that
the drain valve is closed, check the proximity switch on
the drain valve, turn the fryer off, then turn the fryer on.
