ignition by measuring the flow of microamps through the flame. If the burner does not light (or is extinguished), current to the ignition module is cut, the gas valve closes, and the ignition module “locks out” until the power switch is turned off and then back on. A probe monitors the temperature in the frypot. When the programmed setpoint temperature is reached, resistance in the probe causes the heat cycle circuitry in the computer to cut off current flow through the heat relay. This in turn cuts off the 24 VAC to the ignition module, causing the gas valve to close.
1.3Interface Board
All fryers in this series have an interface board located in the component box behind the control panel. The interface board provides a link between the computer and the fryer’s individual components without requiring excessive wiring, and allows the computer to execute commands from one central point.
K2 and K3 are
LEDs (labeled D1 through D7) are arrayed around the board to assist in troubleshooting.
|
| INTERFACE BOARD |
|
| LED DIAGNOSTIC LIGHTS |
D1 | 24 | VAC to left gas valve (dual vat only) |
D2 | 24 | VAC to left ignition module (dual vat only) |
D3 | 24 | VAC from transformer |
D4 | 24 | VAC to right ignition module |
D5 | 24 | VAC to gas valve (right valve if dual vat) |
D6 | 12 | VAC from transformer |
D7 | CE and Japanese units only: air switch closed |
NOTE: In
The chart on the following page illustrates current flow through the board, and the table at the top of page