Operation And Troubleshooting - Flow Chart - Rheem Raypak AVIA 264 Installation And Operation Manual

Opera�on and Troubleshoo�ng – Flow Chart

Operation and Troubleshooting - Flow Chart

START
Turn Gas Supply OFF.
Adjust Temperature
Setpoint to Call for Heat
Power to Control Board?
(24VAC Nominal)
YES
Spark across Igniter?
YES
Turn Gas Supply ON
Wait for Heater to spark
again.
NOTE: If controller is
lockout, restart heater.
Burner Running?
YES
Unit is Heating
Heater runs until call for
heat ends?
YES
Call for Heat Ends
Unit Shuts off?
YES
Troubleshooting
completed
END
NOTE: Before troubleshooting, familiarize yourself with the start-up and
check-out procedure
Check line voltage power (120V or 240V), transformer voltage (24VAC), 5A
NO fuse, controller terminals and wiring. Make sure that line voltage is NOT
208VAC or below.
Pull ignition lead and check
NO
spark at Control board.
Is spark OK?
YES
•
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.
•
Check that all manual gas valves are open, supply tubing and pressures
are good, and burner orifice is not blocked.
•
NO
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, check main power or replace transformer.
•
Check for Error Messages in the Display. See "Control Logic Flow".
•
Press SERVICE key to check that Flame strength is 5 μA or above.
•
Check continuity of ignition cable and ground wire.
•
If checks are okay, replace control board; If not, fix ground wiring, replace
NO
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.
•
Check Temperature setpoint, water temperature and proper keypad
operation.
NO
•
Remove gas valve lead at module; if valve closes, recheck temperature
controller and wiring; if not, replace gas valve.
NOTE: For more details please visit:
https://www.raypak.com/support/tech-corner/avia-
troubleshooting/
WARNING: HIGH VOLTAGE WARNING: HIGH VOLTAGE
For qualified technicians ONLY For qualified technicians ONLY
NO Replace Control Board
49