Operational Disturbances; What To Do If A Fault Occurs - IVT 495 TWIN Manual To Installation, Commissioning And Maintenance

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Table Of Contents

Table of Contents

What to do if a fault occurs:

If something is wrong, begin by working through

the following checklist:

Is the power on?

The main switch ( 7) must be set to 1 and the

green lamp on the control panel should be lit or

flashing.

Are the group fuses and main building fuses

OK?

If the switches are on and the green lamp is not lit,

a fuse may have blown. Check and replace the

fuse if necessary.

Is the control panel unlit?

Press the miniature circuit breaker (MCB) on the

electric box ( 5) once. If the control panel goes off

again contact your service engineer. Also check

that the manual operation switch is off ( 6).

Is the display flashing?

This is not a fault. It is part of the control unit's

monitoring function.

Are the radiators cold despite the plant being

switched on?

Check that the radiators are properly vented, turn

off the plant using the main switch when venting.

Vent the heat pump with the venting nipple ( 20)

located on the side of the hot water safety valve.

Open the nipple a couple of turns until water

comes out. Close the nipple afterwards. If one or

more of the radiators are still cold contact the

plumber.