Henny Penny OEA/OGA-341 Technical Manual page 10

1-4. ERROR CODES
(Continued)
DISPLAY
"E-20 A" Vacuum
switch failure
(stuck closed)
"E-20 B" Draft fan or
vacuum
switch failure
(stuck open)
"E-20 C" Ignition modules
not responding
"E-20 D" Pilots not lit or
no flame sense
"E-47" Analog converter
chip or 12 volt
supply failure
"E-48" Input system
error
"E-70" Faulty power
switch or switch
wiring; faulty I/O
board
"E-92" 24 VAC fuse
on I/O open
1-6
CAUSE
Press the timer button to try the ignition process again,
and if "E-20 A" persists, check the air switch per Vacuum
Switch Section
Press the timer button to try the ignition process again,
and if "E-20 B" persists, check the vacuum switch per
Vacuum Switch Section or the blower motor per Blower
Motor Assembly Section
Press the timer button to try the ignition process again; if
"E-20 C" persists, check the ignition module per Ignitor
Module Section, the spark ignitor per Pilot/Ignitor
Assembly Section, or the I/O board per Control & I/O
Boards Section
Press the timer button to try the ignition process again; if
"E-20 D" persists, check the ignition module per Ignition
Module Section, the I/O board per Control & I/O Boards
Section, or the flame sensor per Flame Sensor Section
Turn switch to OFF, then back to ON; if "E47" persists,
replace the I/O board, or the PC board; if speaker
tones are quiet, probably I/O board failure
Replace PC board
Check power switch, along with its wiring;
replace I/O board if necessary
Check for shorted component in 24 volt circuit;
(i.e., high limit, drain switch, vacuum switch)
Model OFE/OFG/OEA/OGA-341, 342
PANEL BOARD CORRECTION
1003