Camus Hydronics DRH300, Installation, Operation And Service Manual

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Alert 291: Abnormal Recycle: Flame was not on at end of ignition
Alert 292: Abnormal Recycle: Flame was lost during Main Flame Establishing Period
Alert 293: Abnormal Recycle: Flame was lost early in Run
Alert 294: Abnormal Recycle: Flame was lost during Run
Alert 324, 374-379: Abnormal Recycle: Hardware flame bias
This error occurs when a flame signal is not detected by the flame sensor. A minimum signal of 0.8Vdc must be detected by the
flame sensor to prove the flame.
Check flame
sensor wire
Within harness bundle
Move flame sensor wire away from harness bundle
Separated from
harness bundle
Check hot
surface igniter
for minimum
3.0A reading
No
Replace igniter
Yes
Check flame
sensor for
carbon
deposit
Yes
Clean and/or replace
Verify
differential air
signal is at
0.35” w.c. at
80
o
F return
water
temperature
No
Adjust VFD parameter 45 (speed at minimum signal)
until 0.35” w.c. is reached across air differential.
No