Bosch ZWB24-1AR Series - User Manual

6 720 644 062-00.1O
Condens 2000 W
Service Manual
ZWB24 - 1AR...
TT-RH/PRMM21 - 01.2017

Summary

1 Safety Precautions and Symbols

1.1 Safety Precautions

General safety guidelines, gas handling, fitting, maintenance, and material precautions.

1.2 Symbols

2 Service Function Adjustment

2.1 Service Function

2.2.1 1. Service Level

3 Failures; Errors

3.1 Elimination of Errors

Safety measures and initial steps for troubleshooting and resolving appliance errors.

3.2 Failure; Error Codes Overview

3.3 Failure Codes and Correction Steps

A2 Combustion Chamber NTC Failure

A6 Combustion Chamber NTC Failure

A7 DHW NTC Sensor Failure

B3; d5 Water Level Switch Failure

CE; d4 Fast Temperature Increase

C7 Fan Sensor Not Detected

C8 Fan Speed Issues

d7 Regulator Valve Problem

E9 Overheat Lock-out

EA Ignition Lock-out

E2 CH Flow Temperature Sensor Failure

FA Gas Flame Detected After Shutdown

II MAP Not Selected

Bosch ZWB24-1AR Series Specifications