Fault Finding; Removal Of The Electronics; Replacement Of The Electronics; Diagnostics - Viking VSF303 Technical Manual

Multi spectrum ir flame detector

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7 Fault Finding

Warning there are no user replaceable parts within the electronic module. Any attempt to repair or

dismantle the electronic sub-assemblies will void the warranty. If any fault is suspected within the

electronics module the module is to be returned to Viking for investigation and repair if required. Any

faults should be reported to Viking as per the instruction in section 6.2.

Removal of the electronics should only be performed by competent personnel. The following is the

procedure for removal of the electronic module: -

1. Loosen the Allen screw that secures the lens cap to the housing.

2. Un-screw the lens cap assembly and remove.

3. Gently un-screw the three screws indicated until they freely turn. Please note these screws

are not removable.

4. Grasp the two screws positioned at the bottom of the detector and pull the electronics

module out of its housing.

The following is the procedure for installation of the electronic module: -

1. Insert the electronic module with the center sensor positioned at the top of the housing.

2. Rotate the module clockwise and anti-clockwise until the locating pins click into position.

3. Push the electronics assembly into the housing until the face plate is flush with the front of

the housing. Note: This should take minimum force if the locating pins are in position.

4. Gently screw the three screws until they bottom. Note: Do not over tighten.

5. Grease and replace the lens cap.

6. Tighten the lens cap Allen locking screw.

It is impossible to provide fault diagnostics for every possible detector fault. In all cases it is advised

that the following best practice is followed:

1. Only make one change at a time (changing more than one thing makes diagnosis very

difficult).

2. Check the most obvious possible cause first.

3. Work systematically through the problem.

4. Keep good notes on the original problem, each step taken, and the results observed.

VSF303 Flame Detector

Safety and Technical Manual

Form No. F_020521

Rev: 2

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