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1-4
FREQUENTLY USED TEST POINTS FOR INTERFACE BOARD 106-6706
Meter
Setting
12VAC Power to Controller 50VAC Scale 1 and 3 on J3 or J2 12-18
24VAC Power to Right Module 50VAC Scale 8 on J3 and GROUND 22-28
120 VAC Power 250VAC Scale 11 on J3 and GROUND 110-125
120 VAC Power to Blowers 250VAC Scale 12 on J3 and GROUND 110-125
24VAC Power to Full Vat High-Limit 50VAC Scale 9 on J3 and GROUND 22-28
Probe Resistance (Full Vat) * R x 1000 OHMS 2 and 6 on J3 or 13 and 14 on J2 **
Probe Isolation R x 1000 OHMS 6 on J1 or J3 and GROUND ***
High-Limit Continuity (Full Vat) R x 1 OHM 9 on J3 and Wire 13C on Gas Valve 0
** See Probe Resistance Chart at end of chapter.
*** 5 mega-Ohms or greater.
Test Pins Results
** Disconnect 20-pin harness from controller before testing probe circuit.
1.4 Thermostats
Protector
®
series gas fryers have temperature probes located on the front centerline of each frypot. 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 computer monitors the probe resistance and controls burner firing when the resistance exceeds or
falls below programmed temperatures (setpoints).
Protector
®
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
DANGER
Moving a fryer filled with oil may cause spilling or splattering of the hot liquid. Follow
the draining instructions in Chapter 5 of the Protector
®
Series Gas Fryer Installation
and Operation Manual (P/N 819-6339) 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.