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4.0
Operation
•
Diagnostics
Operational Indicator Lights
The externally located operational indicator lights are provided to assist in troubleshooting of the heater.
Refer to the following pages for additional troubleshooting.
Figure 3.1
Operational Indicator Lights
•
Light 1
Indicates Valve Opens
Chart 3.1
LED Diagnostic Codes - Fenwal Circuit Board
•
LED CODE
Initial flash on power up,
then steady off
Steady on
1 flash
2 flashes
3 flashes
4 flashes
No flash on 117 V start-up
*Some LED codes have a time delay before the LED will flash.
Chart 3.2
LED Diagnostic Codes - Capable Controls Board
•
LED CODE
Initial flash (Red) on power up; during ignition
Steady flash (Green) during Ignition
Steady on (Green) after flame sense.
1 flash (Red)
1 flash (Red)
2 flashes (Red)
3 flashes (Red)
4 flashes (Red)
5 flashes (Red)
6 flashes (Red)
*Some LED codes have a time delay before the LED will flash.
•
Operational Indicator Lights
HOT
120V
NEUTRAL
EARTH
- 120V HEATER INPUT -
24V AC
R
POWER
24V
W
HEAT
For use in
24V AC
a Class 2
C
COMMON
circuit only
24V AC
- THERMOSTAT CONNECTION -
Indicates Pressure Switch Closes
Operational Indicator Lights
Module failure/Internal fault
Solenoid valve fault/Leaky valve/
Light 2
FAULT STATUS
No fault, normal operation
Ignition failure
APS (Air Proving Switch)
(Fan/Intake/Exhaust)
Lockout
Flame amplifier fault
Transformer fault
FAULT STATUS
Normal operation
Normal operation
Normal operation
Ignition failure
Reverse Polarity
Ignitor error
Gas valve error
Line voltage frq. error
Internal control error
Pressure switch error
54
DX3L
Series
FAULT CODE DELAY*
No delay
No delay
3 minutes
0-30 seconds
17 minutes
No delay
No delay
FAULT CODE DELAY*
Immediate
Immediate
1 minute
3 minutes
30 seconds
12 seconds
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