Beckett 7590 Gas Power Burner Control - Manual (Page 15)

15
GeniSys Gas Power Burner Control Installation and Operation Manual
▪ No power to the module.
▪ Check to make sure thermostat or controller is calling for
heat and limit is closed.
▪ See instructions in troubleshooting box “If the red Status
LED is off”.
Is the red
Status LED on?
Pre-Purge
Troubleshooting Sequence
Start with gas supply off and set thermostat or controller to call for heat.
Continued on
next page
YES
NO
FLAME
MV STATUS
FLAME
MV STATUS
▪ If red Status LED is flashing slowly (1 time per second)
control is in pre-purge, motor should be running.
▪ If red Status LED is flashing quickly (3 times per second)
control is in lockout. Check the air pressure switch and
follow steps under troubleshooting box “If the red Status LED
is flashing quickly”.
▪ If red Status LED is on steadily, the control is waiting for the
air pressure switch. See instructions “If the red Status LED
is on steadily”.
▪ If both Status and MV LEDs are lit, control is in trial for
ignition, the igniter should be sparking and motor running.
▪ Check incoming line voltage to burner and control (120 V)
▪ With power off, check all wiring and connections to igniter.
▪ Check for correct spark gap on ignition electrode.
▪ Check ignition cable and ground wire for continuity, replace
if necessary.
▪ If ignition cable shows signs of melting or wear, replace and
reroute or shield cable.
▪ Check ceramic insulator around the electrode for cracking
or chipping, replace if needed.
▪ With power off, loosen 7590 from junction box, carefully
remove female quick connect terminals from Igniter and L2
male terminals. Restore power and start ignition sequence.
With the Status and MV LEDs on, carefully measure the
voltage between male Igniter and L2 terminals. Voltage
should be 120 Vac. If no voltage, replace control.
▪ If voltage between Igniter and L2 terminals is 120 volts and
all connections to igniter, electrode and ground are good,
replace igniter.
▪ Status LED will flash approximately once per second during
pre-purge. Burner motor should be running.
▪ Wait for the control to complete the pre-purge timing.
▪ Note: Status LED does not flash for a 1 second pre-purge.
Trial for Ignition
Is the igniter
sparking during
trial for ignition?
Pre-purge
complete?
1-240 sec.
NO
YES
NO
YES
FLAME
MV STATUS