valutazioni - 3, GPA: 4
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(0.8 kPa)? Is gas valve vent tube obstructed? Clear obstruction. Problem is not with gas valve. Adjust pressure to specification. If gas valve will not adjust, replace gas valve. Problem is with gas supply to fryer. LP (Propane) Gas Is incoming gas pressure 11-14" W.C. (2.74-3.49 kPa)? Is burner manifold gas pressure 8.25" W.C. (2.5 kPa)? Is gas Valve vent tube obstructed? Problem is with 24VAC circuit. Refer to Troubleshooting the 24VAC Circuit. YesNoYesNoYesNoYesNoNoYesNoYesYesNo 6-13 6.8.2 Troubleshooting the 24 VAC Circuit in FBR18 Units NOTE: All voltage measurements must be made within 4 seconds of unit calling for heat. If unit does not fire within 4 seconds, ignition modules will lock out and controller must be turned off then back on to reset. UNIT IS CONNECTED TO POWER SUPPLY, DRAIN VALVE IS FULLY CLOSED, CONTROLLER IS ON AND IS CALLING FOR HEAT (decimal appears between first two digits in controller display). Is 24VAC present on interface board J3 pin 9 (LED 5 (GV) lit)? Is 24VAC present across the gas valve main coil (PV terminal)? 24V circuit is OK. Probable cause is failed wire between interface board and gas valve. Is LED 3 (24V) lit continuously? Is LED 4 (PWR) lit? Is LED 2 (PWR) lit? Is 24VAC present on 25V terminal of LEFT ignition module? Is 24VAC present on VALVE terminal of ignition module? Probable cause is failed wiring harness. If fuse is not blown, module has failed. Is 24VAC present on 25V terminal of RIGHT ignition module? Probable causes are failed wiring between blower centrifugal switch and module, failed centrifugal switch, or failed wiring harness. Check for 12VDC across interface board J2 pins 4 & 5 when controller is calling for heat. If 12VDC is not present, probable causes are failed controller or failed relay on interface board. On later design boards, relay K3 may be replaced. On earlier design boards, the entire interface board must be replaced.. Probable causes are failed 24V transformer or failed wiring between transformer and interface board. YesNoYesNoYesNoYesNoYesNoYesNoYesNoYesNo 6-14 THE 24 VAC CIRCUIT IN FBR18 UNITS 24V TRANSFORMER J3 PIN 8 LED 3 (24V) RELAY K2 ON EARLY DESIGN BOARDS OR RELAY K3 ON LATER DESIGN BOARDS LED 4 (PWR) RIGHT PWR TERMINAL J2 PIN 7 BLOWER CENTRIFUGAL SWITCH RIGHT IGNITION MODULE J2 PIN 5 V1S TERMINAL 2 (PWR) LEFT PWR TERMINAL J2 PIN 2 LED LEFT IGNITION MODULE J2 PIN 4 V2S TERMINAL LED 5 (GV) J3 PIN 9 GAS VALVE 6-15 6.8.3 Troubleshooting the 24 VAC Circuit in FBRA18 Units UNIT IS CONNECTED TO POWER SUPPLY, DRAIN VALVE IS FULLY CLOSED, NO WATER IS IN POT, CONTROLLER IS ON. Is POWER LED lit? Is WATER LED lit? Is unit filling with water? Once water reaches upper water level sensor, does filling stop and WATER LED go out? Water leg of 24V circuit is OK. Is WATER LED lit? Most probable cause is dirty upper water level sensor, but could also be a loose connection between sensor and interface board, or a failed interface board. Most probable cause is failed solenoid, but may also be a failed water relay on interface board. Most probable cause is a failed solenoid, but may also be a failed water relay on interface board or failed interface board. Ensure upper water level sensor is not grounded (i.e., 24VAC present across sensor and cabinet). If sensor is not grounded, most probable cause is failed interface board. Go to "A". YesNoYesNoYesNoYesNoYesNo 6-16 6.8.3 Troubleshooting the 24 VAC Circuit in FBRA18 Units (Continued) NOTE: All voltage measurements involving the gas valve leg of the 24V circuit must be made within 4 seconds of unit calling for heat. If unit A does not fire within 4 seconds, ignition modules will lock out and controller must be turned off then back on to reset. Is 24VAC present on N/O terminal of latch relay? Is 24VAC present on COM terminal of latch relay? Is 24VAC present on J1 pin 3? When water level is above lower water level sensor, is CYCLE LED lit? Go to "B". Go to "C". Probable causes are failed wiring between terminal block and computer, or failed computer. If 12VDC is applied across coil, probable cause is failed relay. If not, probable cause is failed wiring between controller and latch relay or failed controller. Probable causes are failed 24V transformer or failed wiring between transformer box and component box. YesNoYesNoYesNoYesNo 6-17 6.8.3 Troubleshooting the 24 VAC Circuit in FBRA18 Units (Continued) NOTE: All voltage measurements involving the gas valve leg of the 24V circuit must be made within 4 seconds of unit calling for heat. If unit does not fire within 4 seconds, ignition modules will lock out and controller must be turned off then back on to reset. B Is 24VAC present across the gas valve main coil (PV) terminal? Gas valve leg of 24V circuit is OK. Is 24VAC present on VALVE terminal of LEFT ignition module? Probable cause is failed wiring between module and gas valve. Is 24VAC present on 25V terminal of LEFT ignition module? If fuse is not blown, module has failed. Is 24VAC present on J2 pin 4? I...