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Portable Dryer Troubleshooting
40
Fenwal Board Troubleshooting
On-Board Diagnostics
The LED will flash on for 0.2 seconds then off for 0.2 seconds to indicate an error condition.
The pause time between error codes will be 2.5 to 3.0 seconds. During power-up, the LED will light
for one second and then turn off to indicate normal operation.
LED Indication Fault Mode
Steady on Internal Control Failure
2 Flashes Flame Fault**
3 Flashes Ignition Lockout Fault
** May indicate either that a flame was detected during
pre- or post-purge, or that there is a flame sensing error.
Micro Amp Meter
Flame
Test
S1
FC+
FC-
+
-
Flame
Test
If a lockout occurs, the board will have to be reset
by shutting off the power to the board.
S1
Measure Flame Current
YES NO
NO
BURNER
BURNER
BURNER
Wiring Reference