Справочник Пользователя для Roberts Gorden UHA[X][S] 125

34 

2. The automatic firing sequence will begin as 

described on Page 30, Figure 16. The heater 
will now operate automatically under the control 
of the on site controls.

11.4.2 To Turn the Heater Off 
Set the thermostat to the "OFF" position.

 

The burner will turn off immediately.

 

The fan will continue to run for 90 seconds.

 

To restart, turn the thermostat above room 
temperature.

11.5 Simple Troubleshooting 
Some possible reasons for the heater not operating 
are:

1. Gas supply not "ON".

2. Electricity supply not "ON".
3. The time and/or temperature controls are not 

"ON".

4. A limit switch may have operated. This may be 

caused by an interruption of the electrical 
supply, failure of the distribution fan or vent or 
heat exchanger blockage.

If a temperature limit switch persistently trips, there 
is a fault which must be investigated by a contractor 
qualified in the installation and service of gas-fired 
heating equipment.

11.5.1 Simple Troubleshooting (Burner Faults) 
If the burner fails to ignite for any reason, it will retry 
for ignition (four trials total). After four unsuccessful 
ignition trials, the control will put the heater into 
lockout for one hour.
Lockout should not occur during normal operation of 
the heater and indicates there is a fault condition 
which must be corrected. There is an LED light on 
the ignition control that flashes codes to assist in 
fault correction. See Page 34, Figure 20 for LED 
indication codes.

Slow Flash

Normal Operation - No call for heat.

Fast Flash

Normal Operation - Call for heat.

2 Flashes

Ignition Lockout - No flame detected.

3 Flashes

Airflow Fault - Pressure switch open or closed.

4 Flashes

Temperature Limit or 

 

Manual Reset Limit Switch Open

5 Flashes

Flame Sense Error - Gas valve not energized.

Steady On

Internal Control Failure