USE ONLY GENUINE REPLACEMENT PARTS 41
Table16: Display Code Index
NOTE: Continuation of control sequence is immediate after error is corrected. Automatic
reset may take up to 2min for control self-diagnostics to complete. Lockout recover may
take up to 60 min.
Air switch circuit
closed error
Blower vacuum switch closed when expected open. If the blower vacuum
switch is closed before blower has started, the ignition control board will not
start the blower until circuit is opened.
Air switch circuit
open error
Blower vacuum switch open when expected closed. If the blower vacuum
switch does not close after the blower starts for ignition or opens unexpectedly
during operation / post purge the ignition control board will shut off gas and air
flow and attempt a new ignition. If the blower vacuum switch does not close
after the blower starts for ignition the ignition control board will suspend the
ignition trial and go into lockout. The blower will continue to run.
Ignition control
board data error
If the ignition control board does not satisfy self-diagnostic or input data values
are corrupted on power up or initial trial for ignition, the ignition control board
will lockout until error condition is corrected..
Gas valve sensed
as “ON” error
If gas valve is powered when it should be off the heater will shut down and go
into lockout. Blower will operate until error condition is corrected.
Gas valve sensed
as “OFF” error
If gas valve is unpowered but flame is sensed the blower will run for 5 s then
start a new ignition sequence. If error occurs 10 times during a call for heat the
ignition control board will go into lockout.
This is normal display when heater is being controlled by a remote thermostat.
No service is required. If heater is not being controlled by remote thermostat,
change setting by using the MODE key to put the heater into STANDBY. Press
and hold the DOWN key and then press and hold the MODE key. Hold down
both keys for 3 seconds until the indication ‘‘bO’’ is removed from the display.
If communication between the ignition control board and the display board is
not established within 3 s of power-up or is lost for 30s during operation unit
will shut down and error will be displayed. The error code will be cleared upon
a valid data exchange between boards.
An error was detected in the ignition control board.
High flame sensor
signal error
If flame is sensed with the gas valve off the ignition control board will go into
lockout. The blower will run until error condition is corrected. When corrected,
the ignition control board will run blower for 5 s then automatically restart after
2 minutes.
To Next Page
Loading...
