Frymaster H50 Series - Manual (Page 14)

1-8
1.5 Measuring Flame Current
When the burner flame is properly adjusted, it will produce a current between 2.5
μA and 3.5 μA.
Flame current is measured by placing a microamp (not milliamp) meter in series with the sensing
wire on the ignitor. This is accomplished as follows:
1. Place the fryer power switch in the OFF position.
2. Disconnect the sensing wire from one of the burner ignitors and connect it to the positive lead of
the meter. Connect the negative lead of the meter to the terminal from which the sensing wire
was removed.
3. Place the fryer power switch in the ON position to light the burners. Wait at least one minute
after the frypot temperature reaches 200
°F (93°C) before checking the reading. NOTE: The
closer the unit is to normal operating temperature, the more accurate the reading will be.
1.6
Replacing Fryer Components
1.6.1 Replacing the Controller or the Controller Wiring Harness
1. Disconnect the fryer from the electrical supply.
2. Remove the two screws in the upper corners of the control panel and swing the panel open from
the top, allowing it to rest on its hinge tabs.
3. Disconnect the wiring harness from the back of the controller and, if replacing the harness,
disconnect it from the interface board.
4. Disconnect the ground wire from the controller, and remove the controller by lifting it from the
hinge slots in the control panel frame.
5. Reverse the procedure to install a new controller or wiring harness. NOTE: Ensure that the fer-
rite bead (black ring) in the harness is at the controller end.
1.6.2 Replacing the Temperature Probe or High-Limit Thermostat
1. Disconnect the fryer from the electrical supply.
2. Drain cooking oil below the level of the probe or thermostat.
3. Remove the screws from the upper corners of the control panel and swing the panel open from
the top, allowing it to rest on its hinge tabs.
4. Unplug the controller wiring harness from the back of the controller.
5. Remove the controller by lifting it from the hinge slots in the control panel frame.
6. If the fryer has a built-in filtration system, loosen the bolt securing the oil return handle to the oil
return operating rod.