86
Unit stuck at modulation
rate.
Serial communications.
Unit in commission mode.
Disable release to modulate button, or change modulation rate slider in
ComFire.
Press RUN then ENTER to enter run mode.
Drives are "stuck" in purge
position when burner is
turned off.
Has post purge been selected?
Check option parameter 9.1
Post purge does not occur.
Has post purge been selected?
Is the unit in safety shutdown mode?
Check that option parameter 9.1 is non-zero.
No post purge in safety shutdown.
PROBLEM
POSSIBLE CAUSE
SUGGESTED ACTION
