-
Pitco – TBSFSSH55 Heat Failure Error
I have a Pitco Taco Bell version of the self filtering Solstice fryer that has started acting up as of late.
First strange behavior was the self cleaning burner solenoid making a buzzing/rattling noise at start up. Rather than opening then closing, I sounds like it is opening and closing rapidly for the duration of the SCB cycle.
Now I am getting the same kind of sound/behavior from the relay board followed by a Heat Failure error even though the burner is on.
I have checked to make sure I am getting 24v at the board and got a reading of 26.5v. Any recommended troubleshooting steps? I suspect the relay board itself, but don’t want to just throw parts at the problem!
-
2 Replies
-
I haven’t had a chance to dig into the relay board further, but after replacing it I have had no problems on startup and call for heat. The solenoid for the SCB opens and closes correctly and no more relay chattering.
If I get a chance, I will take a look at the components on the relay board itself and see if any of the diodes or rectifiers have failed.
-
Solid state boards operate on DC. Gas valves can be AC or DC. So you have to check the tag. If the gas valve is AC, then there will be a relay on the board for it. But in any case, there will also be a time factor for flame recognition to clear. Often they use flame rectification by sending a AC voltage over the sensor ignition probe and measure the return voltage on the burner ground looking for a greater than 10 milliamps DC.
Reason I say this, is I too have used the wrong scale on my DVM testing. When you have one chattering, Attach your leads with clamps and set Min/Max to monitor the valve. It will see what you can’t due to delays in meter posting.
Log in to reply.