64
£
Commissioning Problem
Gas Valve Proving Problem
PROBLEM
POSSIBLE CAUSE
SUGGESTED ACTION
Cannot get past P0.
Unit in safety shutdown.
Air pressure switch still made.
No fuel selected.
Burner not selected.
High control limit exceeded.
Unit in commission ratio mode.
Burner off via serial comms.
Hold FAULT MUTE key when faults clear.
Wait for burner fan to stop.
Check EK1 (oil input) and EK2 (gas input).
Check EK11 (burner select input).
Check EK18 and wait for press/temp to drop.
Press NEXT to advance to next setpoint.
Turn burner on using ComFire software.
‘Px’ or ‘Ax’ display flashes
constantly and servo-
motor positions cannot be
altered.
Drives moving to position.
Valve proving test in progress.
Burner off in adjust ratio mode.
A0, A1, A2 displayed.
Wait for drives to reach position.
Wait for valve proving test to finish.
Fire burner to alter points in adj. ratio mode.
Use commission ratio mode to alter these.
‘Px’ or ‘Ax’ display does
not flash and servo-motor
positions cannot be
altered.
Incorrect servo-motor selected.
No feed on SERVO-MOTOR COM.
servo-motor microswitch open.
Use the top left/right arrow to select a servo-motor.
Check for feed on terminal PA1.
Adjust servo-motor microswitch.
Servo-motors appear to
move too quickly.
+15V potentiometer supply incorrectly
selected.
Change the link on the backplane board to select a +5V
potentiometer supply.
Servo-motor feedback will
only go up to approx....
35°.
+5V potentiometer supply incorrectly
selected.
Change the link on the backplane board to select a +15V
potentiometer supply.
Option parameter not avail-
able.
Another option parameter must be set first.
Set option parameter (usually XX.0) to a non- zero value
to enable other params. in group.
Option parameter not
adjustable.
Wrong passcode entered or burner firing.
Enter the supplier passcode and/or turn the burner off
before changing the value.
Not possible to enter com-
mission ratio mode.
Supplier passcode incorrect. Burner firing.
Enter correct passcode.
Turn burner off.
Not possible to enter adjust
ratio mode.
Supplier passcode or adjust ratio passcode
incorrect.
Enter supplier passcode with the burner on OR adjust
ratio passcode with the burner off.
PROBLEM
POSSIBLE CAUSE
SUGGESTED ACTION
Proving sequence takes a
long time.
Nominal gas pressure, test volume or leak-
age rate incorrect.
Check option parameters 02.3, 02.6 and 02.7 Expected
time shown on EK38.
Main valve 2 does not
open.
Vent valve has been selected.
Check option parameter 02.8.
Vent valve does not open.
Vent valve not selected.
Check option parameter 02.8.
Main valve 1 and/or main
valve 2 do not open.
Valve proving not selected.
No feed on BURNER SEL.
Check option parameter 02.0.
Check for feed on terminal PB7.
