Beckett 7590 Gas Power Burner Control - Manual (Page 13)

13
GeniSys Gas Power Burner Control Installation and Operation Manual
Troubleshooting
Check LEDs First - Find the box on the left that matches the LED display you are seeing.
When all three LEDs are on continuously and the burner is lit, the system is
operating normally. The troubleshooting information is intended as a guide and may
not cover all possibilities in every application.
Table 5 - Troubleshooting
FLAME
MV STATUS
If the red Status LED is off:
▪ No power to the control.
▪ Check that the thermostat or controller is calling for heat.
▪ Check for power to the appliance.
▪ Check that limit is closed, check that the thermal (blocked vent)
switch is closed.
▪ Check for power to the system transformer.
▪ Check all wiring and secure all connections
▪ With the controller calling for heat, use a volt meter to measure 24
volts to the control. Place one probe on the right thermostat terminal
and the other probe on an unpainted portion of the burner. If no
voltage is measured, there is no power to the control. If 24 volts is
measured, move the first probe from the right thermostat terminal
to the left thermostat terminal. If 24 volts is measured on the left
terminal and the red Status LED is off, replace the control. If no
voltage is measured on the left terminal, the thermal switch is open.
FLAME
MV STATUS
If only the red Status LED is on steadily:
▪ If motor is off—air pressure switch is closed (stuck), will wait for
switch to open.
▪ If motor is on—waiting for air pressure switch to close.
▪ If switch fails to open or close within a specified time, control will lockout.
▪ If switch opens and closes properly, control will move to pre-purge.
FLAME
MV STATUS
If the red Status LED is flashing quickly (3 times per sec.)
▪ Control is in lockout.
▪ Check the air pressure switch. If the air pressure switch is stuck in
the closed position or if the air pressure switch has been jumpered,
the control will lockout. The control will also lockout if the air pressure
switch fails to close when the motor/blower starts. Check to make
sure motor and blower are running during trial for ignition.
▪ Push the reset button or turn the thermostat or controller to off posi-
tion, wait 10 seconds then turn thermostat or controller to call for heat.
▪ If control is a non-volatile lockout model (7590C), the control can only
be reset using the reset button while the module is powered.
▪ Control should start ignition sequence. Motor/blower should be on.
▪ If burner does not light properly, follow the troubleshooting sequence.
FLAME
MV STATUS
If the red Status LED is flashing slowly (1 time per sec.)
▪ If motor/blower is running, control is in pre-purge or control is in a
waiting period between trials for ignition. If motor is not running, con-
trol is in soft lockout waiting to retry in 1-8 hours (reset control).
▪ The pre-purge period is 1-240 seconds, depending on setting.
▪ The control waiting period is 90 seconds to 5 minutes, depending on
setting.
▪ Either wait for pre-purge/waiting period to finish, OR
▪ Turn thermostat or controller off for 5 minutes to let accumulated gas
disperse, (LED should turn off) then turn thermostat or controller back
on to restart ignition sequence. Allow the control to go through pre-
purge, if any, and complete the trial for ignition sequence.
▪ If burner does not light properly, follow the troubleshooting sequence.
Table 5 continued on next page ►