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If the sensed failure is in the system (external to the control), the LED will flash in the
following flash-pause sequences to indicate failure status (each flash will last
approximately 0.25 seconds, and each pause will last approximately 2 seconds).
1 flash, then pause
system locked
2 flashes, then pause
pressure switch stuck closed
3 flashes, then pause
pressure switch stuck open
4 flashes, then pause
open high limit switch
5 flashes, then pause
loose jumper between 5 & 11 on molex plug
6 flashes, then pause
115 volt AC power reversed
7 flashes, then pause
low flame sense signal
8 flashes, then pause
check ignitor or improper grounding
Continuous flashing
Flame has been sensed when
(no pause)
no flame should be present
(no call for heat)
The LED will also flash once at power-up.
: Power must be disconnected before servicing.
Summary of Contents for CMA3-50D36N
Page 61: ...58 APPENDIX A REPLACEMENT PARTS...
Page 62: ...59...
Page 63: ...60...
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Page 65: ...62 APPENDIX B WIRING DIAGRAMS...
