Pitco SEH50, Technical Service And Exploded Parts

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6 L22-238 Rev 0 (08/03)
coils out of circuit with an Ohm Meter, the resistance
should correspond to the chart below, if the resistance
varies more than 5 Ohm the element will need to be
changed. Also check for continuity to ground on each
end of the suspect element, there should be no continuity
to ground.
208 volt elements 18.5 Ohms
220 volt elements 20.7 Ohms
240 volt elements 24.6 Ohms
Safety (Side On) Contactor:
Check the coil with an Ohm Meter, the resistance should
be approximately 3 - 6 Ohms out of circuit. If it does not
have this resistance it should be changed.
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: If the fryer is equipped with a computer or
solid state digital, 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 input 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 "IGNITION FAIL-
URE". 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 tem-
perature probe. Check the wires and connectors between
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.
Digital Solid State 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, the display will read
"HEAt", there will be a 24 VDC output at pin #8 (heat
demand) and a 24 VAC input 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" . 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 "Prob", ohm test the temperature probe.
Check the wires and connectors between the probe and
controller for continuity.