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Vaillant COMBlcompact VCW240 User Manual

Vaillant COMBlcompact VCW240
16 pages
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Vaillant Training/Logical Fault Finding Guide for all
COMBlcompact and THERMOcompact models
v
t
v
~Vaillant
HEATING,CONTROLS,HOTWATER.
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Vaillant COMBlcompact VCW240 Specifications

General IconGeneral
Output Power24 kW
Fuel TypeGas
FuelNatural Gas or LPG
MountingWall-mounted
Max. working pressure3 bar
Water pressure (min)0.3 bar
Water pressure (max)10 bar
Central Heating Output24 kW
Flow rate at 35°C9.8 l/min

Summary

General Guidance and Control Panel

General Guidance Notes

Essential reading before using the fault-finding guide.

Front Control Panel Overview

Identifies and explains the functions of controls and indicators on the front panel.

Room Sealed Fan Flued (RSF) Models Troubleshooting

Initial Power Check

Verifies power supply and the main rocker switch neon status.

Fan Operation Diagnostics

Guides through checks for fan functionality and related components.

Pump Operation Checks

Details procedures for checking the circulating pump and its operation.

Ignition Sequence Troubleshooting

Troubleshoots the appliance's ignition attempt sequence.

Burner Light and Stability

Diagnoses burner ignition and flame stability issues.

Burner Modulation to High Fire

Assesses the burner's ability to reach high fire rate.

Burner Modulation to Low Fire and Shutdown

Checks burner modulation down to low fire and shutdown.

Domestic Hot Water (DHW) Operation

Troubleshoots DHW function for VCW models.

Balanced Flue and Open Flue Models Troubleshooting

Pilot Light Establishment

Verifies pilot light ignition and stability.

Initial Power Check

Checks power supply and main rocker switch neon status.

Pump Operation Checks

Details procedures for checking the circulating pump and its operation.

Hydraulic Operation Checks

Checks the hydraulic system, including diverter and differential valves.

Burner Ignition Sequence

Troubleshoots the appliance's burner ignition sequence.

Burner Modulation to High Fire

Assesses the burner's ability to reach high fire rate.

Burner Modulation to Low Fire and Shutdown

Checks burner modulation down to low fire and shutdown.

Domestic Hot Water (DHW) Operation

Troubleshoots DHW function for VCW models.

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