andrews 24/39 Installation And Service Manual page 78

10 Appendix
From previous page
Does damper blade move to
the full open position?
Yes
Is there pilot flame?
Yes
Does Main Burner operate?
Yes
Does burner continue until
thermostat set point is
reached? See setting display in
Service Mode and displaying
temperature sensors.
Yes
Does the flue damper rotate to
the fully closed position?
Yes
System okay
Fig. 40
Example of error code shown on control display
78
Error code #55 on display.
No
Remove damper from heater
and jump black & yellow wires
of heater harness.
No
Error code #62 on display. See
"Pilot Will Not Light".
No
Error code #62 on display. See
"Pilot Lights, No Flame Signal"
No
Error code #63 on display. See
"Main Burner Short Cycles".
Error code #56 on display.
No
Check for debris limiting
damper rotation. If no debris,
replace damper
Error code shown in
water heater display
Caution
Use Caution Not to Damage Connectors when making
Voltage Measurements or Jumping Terminals
damper rotation. If no debris,
Does water heater begin to
operate?
Yes
Check for debris limiting
replace damper.
Issue 2 14/07/16