To Next PageTo Next PageWhat to do if my Bosch WTD 12-3 AME 31 Water Heater has exhaust blockage?
If the fan speed and/or consumption detect a pressure above normal operating conditions on the exhaust, check configuration parameters like AS (altitude), F9 (flue exhaust code), AP (appliance power), etc.
General| Gas Type | Natural gas |
|---|---|
| Ignition Type | Electronic ignition |
| Frequency | 50 Hz |
| Type | Flow-through water heater |
| Mounting Type | Wall mounted |
| Thermostat | Yes |
| Safety Features | Flame failure device, overheating protection |
Explains the function of the control panel for user, installer, and technician operations.
Describes the heat cell, including heat exchanger, burner, and electrodes.
Details the turbine flow sensor, its operation, and characteristic curve.
Explains the ignition electrode's function in spark generation and safety timing.
Describes the ionization electrode's role in sensing flame presence.
Details strategies for reducing power to prevent overheating and scalding.
Presents the electrical diagram and components of the MPP electronic control unit.
Presents the electrical diagram and components of the LPP electronic control unit.
Outlines procedures for entering service mode and performing configurations.
Details adjustments for minimum/maximum power operation.
Guides on accessing combustion adjustment parameters.
Adjusts maximum burner power after component replacement or conversion.
Adjusts minimum burner power after repairs or conversion.
Accesses diagnostic and visualization data for troubleshooting.
Lists the last 10 recorded failures for diagnostic purposes.
Provides recommendations for appliance checks and servicing.
Lists error codes and their definitions for troubleshooting.
Categorizes error codes as self-resolving or requiring action.
Describes troubleshooting for defective water temperature sensors.
Explains actions taken for box over-temperature protection.
Details issues with open circuit air temperature sensors.
Describes troubleshooting for defective outlet water temperature sensors.
Explains troubleshooting when no fan signal is received.
Addresses issues with water flow signals exceeding specified maximum values.
Explains troubleshooting for exhaust blockage detection.
Details actions for detected over-temperature conditions.
Describes troubleshooting for defective inlet water temperature sensors.
Troubleshoots open circuits in temperature limiters or thermal fuses.
Addresses the error when no ionization signal is detected during safety time.
Explains errors related to incorrect gas valve connections.
Details issues arising from an incorrect gas type setting.
Describes troubleshooting for ionization errors.
Explains how to detect and resolve gas valve leakage.
Addresses issues related to ionization signal loss.
Troubleshoots errors in the solenoid valve drive circuit.
Addresses errors in the micro controller's instruction processing.
Troubleshoots errors in instruction compilation and execution.
Addresses internal errors in the micro controller's RAM.
Troubleshoots short circuit errors in APS I/O.
Addresses errors in the micro controller's ROM.
Troubleshoots registration errors in the micro controller.
Addresses errors related to the remote controller function.
Troubleshoots self-check errors within the PCB.
