1-2
1.3 Interface 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 controller and the fryer’s individual components without requiring
excessive wiring, and allows the controller to execute commands from one central point.
K2 and K3 are double-pole-double throw (DPDT) relays that supply 24VAC to the ignition and gas valve
circuits, as well as 120VAC to the blower motor. The relays on this board plug into sockets. If a relay fails,
that relay can be replaced.
LEDs (labeled D1 through D7) are arrayed around the board to assist in troubleshooting.
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
INTERFACE BOARD
LED DIAGNOSTIC LIGHTS
NOTE: In full-vat fryers, the relay for the left side (K2) may not be present.
The chart on the following page illustrates current flow through the board, and the table at the top of page 1-4
identifies frequently used test points.
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