84
Troubleshooting
Display
WARNING: Use extreme care while testing the system. Line voltage is present on most ter-
minal connections when power is on.
Disconnect the power supply before beginning to fault find to prevent electrical shock,
equipment and control damage. More than one power supply disconnect may be involved.
Startup
PROBLEM
POSSIBLE CAUSE
SUGGESTED ACTION
Display will not light
Display shows garbage.
Keys do not work.
Display wired incorrectly.
Check wiring to connector PA.
Check that the links on the PSU board have been set for the
correct voltage supply.
Display will not light.
Fuse blown on PSU board.
Check fuse. If blown, investigate all external wiring and replace fuse
with a new one of the correct type and rating.
Drive positions incorrect.
Wrong potentiometer voltage.
Incorrect potentiometer wiring.
Check POT SUPP link (see 1.6.4).
Check wiring to terminals PD & PG.
Measured value incorrect.
Wrong sensor voltage.
Wrong sensor input type.
Incorrect sensor wiring.
Wrong zero or span.
Setpoint 1/2 incorrectly selected
Has option parameter 3.2 been set
correctly?
Check that the +5/+20V links on the PSU board been set correctly.
Check the I/V link on the PSU is correct.
Check option 03.2 matches
Check wiring to terminals PA16 - 20.
Check option parameters 11.1, 11.2, 13.1, 13.2.
Check EK 27 and select other setpoint.
Setpoint incorrect.
Setpoint 1/2 incorrectly selected
Option params 11.3/13.3 incorrect.
Value updated via serial comms
Check EK 27 and select other setpoint.
Enter option set mode and change values.
Change setpoint using ComFire software.
Hours run shows"---".
Hours run keeps toggling.
No profile selected.
Hours run > 999 hours.
Select oil or gas profile.
1st digits show thousands, 2nd show units.
Modulation rate is 0.
Burner not modulating.
Wait for burner to finish startup sequence.
Burner status is flashing.
Unit in safety shutdown mode.
Burner status before shutdown displayed.
Display flickers at ignition
Poor grounding/shielding
PROBLEM
POSSIBLE CAUSE
SUGGESTED ACTION
Burner will not start.
Unit in safety shutdown.
No fuel selected.
Burner not selected.
High control limit exceeded.
Unit in commission ratio mode.
Burner off via serial comms.
Burner controller lockout
Hold FAULT MUTE key when faults clear.
Check EK6 (profile 1 input), EK7 (profile 2) & EK10 (profile 4).
Check EK5 (burner select input).
Check EK14 and wait for press/temp to drop.
Press NEXT to advance to next setpoint.
Turn burner on using ComFire software.
Check burner controller inputs (PC1-4)
Drive positioning fault
occurs before drives move
to purge.
Stored close positions do not match
actual close positions.
Check feedback potentiometers (by moving them over the full range
and checking that the feedback displayed changes smoothly and
always in the right direction) and motor micro-switches.
Reset close positions using commission ratio
Drive positioning fault
occurs when drives reach
purge.
Stored purge positions do not match
actual purge positions.
Check feedback potentiometers (by moving them over the full range
and checking that the feedback displayed changes smoothly and
always in the right direction) and motor micro-switches.
Reset purge positions using commission ratio
Drives stuck at ignition and
burner has not fired.
Drives cannot reach ignit. pos.
Unit not released to ignite.
Unit in commission mode.
Check motor micro-switches and linkages.
See options 15.1 / 15.2 and inputs PC15 / PC16
Hold ‘NEXT’ key for 3 seconds to ignite.
