Raypak AVIA 264A, Installation And Operation Manual

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Operation and Troubleshooting – Flow Chart
Turn Gas Supply OFF.
Adjust Temperature
Setpoint to Call for Heat
Power to Control Board?
(24VAC Nominal)
YES
Troubleshooting
completed
END
START
NO
NOTE : Before troubleshooting, familiarize yourself with the start-up and
check-out procedure
Check line voltage power (120V or 240V), transformer voltage (24VAC), 5A
fuse, controller terminals and wiring. Make sure that line voltage is NOT
208VAC or below.
Spark across Igniter?
YES
WARNING
: HIGH VOLTAGE
For qualified technicians ONLY
WARNING
: HIGH VOLTAGE
For qualified technicians ONLY
NO
Pull ignition lead and check
spark at Control board.
Is spark OK? NO
YES
Replace Control Board
•
Check ignition cable, ground wiring, ceramic insulator and gap, and correct.
•
Check boot of the ignition cable for signs of melting or buckling. Take
protective action to shield cable and boot from excessive temperatures.
Turn Gas Supply ON
Wait for Heater to spark
again.
NOTE
: If controller is
lockout, restart heater.
Burner Running?
YES
NO
•
Check that all manual gas valves are open, supply tubing and pressures
are good, and burner orifice is not blocked.
•
Check electrical connections between control board and gas valve.
•
Check for 24 VAC across gas valve terminals on control board. If voltage is
okay, replace gas valve; if not, replace control board.
Unit is Heating
Heater runs until call for
heat ends?
NO
•
Check for Error Messages in the Display. See “
Control Logic Flow ”.
•
Press SERVICE key to check that Flame strength is 7μ A or above.
•
Check continuity of ignition cable and ground wire.
•
If checks are okay, replace control board; If not, fix ground wiring, replace
high tension wire or igniter.
NOTE : If ground is poor or erratic, shutdowns may occur occasionally even
though operation is normal at the time of checkout.
YES
Call for Heat Ends
Unit Shuts off?
YES
•
Check Temperature setpoint, water temperature and proper keypad
operation.
•
Remove gas valve lead at module; if valve closes, recheck temperature
controller and wiring; if not, replace gas valve.
Operation and Troubleshooting - Flow Chart
NOTE: For more details please visit https://www.raypak.
com/support/tech-corner/AVIA-troubleshooting/.