Pre-service check, At ignition, During combustion – Rinnai RHFE-308 FTR User Manual

Page 20: When the unit is turned off, Other points

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PRE-SERVICE CHECK

Before asking for a service call please check the following points.
These points are part of the normal operation of the unit.

■ At Ignition:

Heater does not operate.

Warm air does not flow when the burner lights.

Smoke or strange smells are produced on the

first trial light up after installation.

Sharp clicking noises at ignition, or when the

unit cuts down on the thermostat, or goes out.

Is the heater plugged in?

Have the fuses or breaker blown at the switch board?

Is there a power failure?

Is the air filter blocked?

Is anything blocking the outlet for the hot air?

Is the flue blocked?

Are Timers set? Clear Timers and operate again.

■ During combustion:

Clucking noise when the thermostat operates.

Unit is not heating room.

Air filter is blocked or the louvres are blocked or

obstructed.

Heater will not re-ignite after overheating.

This is the sound of the solenoid gas valves opening and

closing.

■ When the unit is turned off:

Convection fan continues to run after turning

OFF.

This is to remove the residual heat from the heat

exchanger, the fan will stop when the heater cools down.

■ Other Points:

Steam is discharged from the flue terminal.

Unit cuts off without apparent reason.

Power Failure.

High efficiency appliances tend to discharge water

vapour on cold days, this is normal.

Check whether filters are blocked, dirty filters will cause

the heater to overheat.

Switch OFF, then ON again when power is restored to

re-set controls.

Is the air filter blocked?

Is the set temperature high enough?

Is the warm air outlet blocked by anything?

Are the doors and windows of the room closed?

Allow heater to cool, clean air filter, operate again.

Even after unit has cooled down the heater does not

ignite again. Repair is necessary.

Contact your local agent or Rinnai for a Service call.

The fan is started automatically after a short delay.

This is to allow the heat exchanger to warm up, helping

to avoid cold draughts.

This is caused by grease or oil and dust on the heat

exchanger and will stop after a short time.

This is simply expansion noise from the heat exchanger.