Honeywell SYA14 Series Manual page 140

FF-SB Installation Manual
Figure 4-3 Troubleshooting Flow Diagram (Sheet 1 of 2)
Go to Next Sheet
For application help: call 1-800-537-6945
Machine Down
Check LEDs, relay
status by using the
troubleshooting
chart
Problem
Resolved?
Check incoming
voltage is within
specification or apply
power with external
test plugs (see Test
Plug Construction)
Problem
Resolved?
No
No
Is spare unit (same size and
family) available?
Yes
Place spare emitter or
receiver in front of the
machine's unit to detect
the failed unit
Yes
Machine
working
Yes
Verify machine
plugs/wiring
interface
Replace faulty
Honeywell • MICRO SWITCH Sensing and Control 59
unit