Main 24 HE A Manuel de l'utilisateur - Page 6

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Air Flow

Monitor Neon

Safety Thermostat

Neon

30° 40° 50° 60° 70° 80°

Fig. 1

Reset

Fig. 2

Reset

Fig. 3

Pump/Low

Pressure Neon

Sensor Fault

Neons

3.0 Fault Indication

Air Flow Monitor

1. The boiler is fitted with an air pressure sensing device.

This monitors the flue system.

2. If the (

) neon illuminates it indicates that the flue or

flue terminal is blocked or obstructed in some way, or that

there is an internal fault. If there is no external blockage of

the flue terminal that can be easily removed contact your

Installer or Service Engineer (Fig. 1).

Pump Fault or Low Pressure

1. The neon (

) will illuminate if the circulating pump is

faulty or the system pressure drops below the minimum

requirement (Fig. 1).

2. Check the pressure gauge as described on page 8. If the

pressure is in the normal range, a pump fault is indicated.

Contact your Installer or Service Engineer to determine the

nature of the fault.

Sensor Fault

1. When either of the the (

on one of the temperature sensors is indicated (Fig. 1).

Contact your Installer or Service Engineer.

Pump Protection

1. With the selector switch in the on position (Fig. 2) the

pump will automatically operate for 1 minute in every 24

hours to prevent sticking.

Safety Thermostat

1. Your Main System HE is fitted with an additional safety

devices, which shut down the boiler in the event of the

system, boiler or flue overheating. The safety thermostat

neon (

) will light in this instance (Fig. 1).

2. To reset: Turn the selector fully anti-clockwise against the

spring pressure to the 'Reset' position for at least two

seconds and release (Fig. 3).

3. If after turning the selector to the 'Reset' position the

boiler does not relight or the safety thermostat operates

repeatedly, causing boiler shutdown, a fault is indicated. Your

Installer or Service Engineer should be contacted as soon as

possible.

) neons is illuminated a fault