Detroit Radiant Products Company DX3 Series - Manual (Page 13)

13
NEUTRAL
EARTH
HOT
- 120V HEATER INPUT -
120V
3.0 Operation • Diagnostics DX3 Series
Figure 3.1 • Operational Indicator Lights
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.
Light 2
Indicates Pressure
Switch Closes
Light 1
Indicates Valve
Opens
Operational Indicator Lights
Diagnostics
Lockout:
The controls will automatically lockout the heater system when an external or system fault occurs. There
are two types of lockout:
Soft Lockout: The heater will attempt to light three times. In the event of a failed attempt to light, (gas
pressure, valve, no flame sense etc.), the heater will enter a soft lockout period for 15
minutes and then attempt to light three more times before entering Hard Lockout mode.
Hard Lockout: If proof of flame is not established, a component failure occurs or blockages are evident,
the heater will enter hard lockout. If lockout occurs, the control can be reset by briefly
interrupting the power source. Refer to Chart 3.1 below for a description of LED codes.