Steady Flash Hard lockout - control failure

What the control is telling you

The DSI module shows a steady LED: hard lockout, treated as a control failure. LED pattern on the DSI module: slow flash = normal, no call for heat; fast flash = normal, calling for heat; two flashes = 5-minute lockout; steady = hard lockout / control failure.

Applies to: Older Heat-N-Glo DSI gas fireplaces with RAM 1MC1-01/-05, RAM-1-RS, CFX-DA, Grand-50-C (120 VAC modules); LED applies to RAM 1MC1, CFX-DA and Grand-50-C

Likely causes

• Failed DSI module
• Wiring fault at the module (power, ground, ignitor cable)

Test and repair steps

1. Warning: Disconnect 110/120 VAC before checking wire connections or changing parts.
2. Cycle power at the On/Off switch and breaker and see whether the module returns to a slow flash.
3. Check the junction box is grounded and the module and burner ground leads are tight, with no paint or other insulation under them.
4. Check the gray ignitor cable and all module connectors for tight connections.
5. Measure AC HOT (black) to AC RTN (white) at the module with the switch ON: 110/120 VAC expected.
6. If power and grounds are good and the hard lockout returns, replace the module.