Thermostats; Accessing Fryers For Servicing; Cleaning The Gas Valve Vent Tube - Frymaster FilterQuick FQG30 Service Manual

FREQUENTLY USED TEST POINTS FOR INTERFACE BOARD 106-6706
Test
12VAC Power to Controller
24VAC Power to Right Module
24VAC Power to Left Module (if present)
120 VAC Power
120 VAC Power to Blowers
24VAC Power to Full- or Right-vat High-Limit
24VAC Power to Left High-Limit (if present)
Probe Resistance (Full- or Right-vat) *
Probe Resistance (Left - if present) *
Probe Isolation
High-Limit Continuity (Full- or Right-vat)
High-Limit Continuity (Left - if present)
** Disconnect 20-pin harness from controller before testing probe circuit.
** See Probe Resistance Chart at end of chapter.
*** 5 mega-Ohms or greater.
1.4

Thermostats

FilterQuick™ FQG30 Series gas fryers have temperature probes located on the front centerline of each frypot
(dual-vat frypots have two probes, one in each vat). In this type of thermostat, the probe resistance varies
directly with the temperature. That is, as the temperature rises, so does resistance, at a rate of approximately 2
ohms for every 1º F. Circuitry in the controller monitors the probe resistance and controls burner firing when
the resistance exceeds or falls below programmed temperatures (setpoints).
FilterQuick™ FQG30 Series gas fryers are also equipped with a high-limit thermostat. In the event that the
fryer fails to properly control the oil temperature, the high-limit thermostat prevents the fryer from overheating
to the flash point. The high-limit thermostat acts as a normally closed power switch that opens when exposed to
temperatures above 425ºF to 450ºF (218ºC to 232ºC). The different types of thermostats have different part
numbers for CE and Non-CE models, and are not interchangeable.
1.5

Accessing Fryers for Servicing

Moving a fryer filled with oil may cause spilling or splattering of the hot liquid. Follow
the draining instructions on page 1-13 thru 1-15 of the FilterQuick™ Controller Manual
(P/N 819-7050) before attempting to relocate a fryer for servicing.
1. Shut off the gas supply to the unit. Unplug the power cords. Disconnect the unit from the gas supply.
2. Remove any attached restraining devices and relocate the fryer for service accessibility.
3. After servicing is complete, reconnect the unit to the gas supply, reattach restraining devices, and plug in
the electrical cords.
1.6

Cleaning the Gas Valve Vent Tube

1. Set the fryer power switch and the gas valve to the OFF position.
2. Carefully unscrew the vent tube from the gas valve. NOTE: The vent tube may be straightened for ease of
removal.
3. Pass a piece of ordinary binding wire (.052 inch diameter) through the tube to remove any obstruction.
4. Remove the wire and blow through the tube to ensure it is clear.
5. Reinstall the tube and bend it so that the opening is pointing downward.
Meter
Setting
50VAC Scale 1 and 3 on J3 or J2
50VAC Scale 8 on J3 and GROUND
50VAC Scale 8 on J1 and GROUND
250VAC Scale 11 on J3 and GROUND
250VAC Scale 12 on J3 and GROUND
50VAC Scale 9 on J3 and GROUND
50VAC Scale 9 on J1 and GROUND
R x 1000 OHMS 2 and 6 on J3 or 13 and 14 on J2
R x 1000 OHMS 2 and 6 on J1 or 14 and 15 on J2
R x 1000 OHMS 6 on J1 or J3 and GROUND
R x 1 OHM 9 on J3 and Wire 13C on Gas Valve
R x 1 OHM 9 on J1 and Wire 12C on Gas Valve
DANGER
1-4
Pins Results
110-125
110-125
12-18
22-28
22-28
22-28
22-28
**
**
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0
0