Hamworthy

Wessex ModuMax Mk3 350

Commercial 350kW 2017-present ErP A 24 fault codes

<p>The Wessex ModuMax Mk3 350 is a combi boiler from Hamworthy, available at 350kW output. Produced 2017-present.</p>

Wessex ModuMax Mk3 350 Fault Codes 24

Code Description Severity Type

E01 Ignition Failure The boiler has failed to ignite after the start-up sequence. High Engineer View Guide

E02 Flame Loss Flame detected during operation has been lost. High Engineer View Guide

E03 Overheat Protection The safety temperature limiter has been activated. High Engineer View Guide

E04 Low Water Pressure System water pressure has dropped below the safe operating level. Low DIY View Guide

E05 Fan Fault The combustion fan is not operating within expected parameters. High Engineer View Guide

E06 Air Pressure Switch Fault The APS is not confirming correct air flow. High Engineer View Guide

E07 Flow Sensor Fault The flow NTC temperature sensor is faulty. Medium Engineer View Guide

E08 Return Sensor Fault The return NTC temperature sensor is faulty. Medium Engineer View Guide

E10 Gas Valve Fault The gas valve is not responding correctly. High Engineer View Guide

E11 PCB Fault Internal error on the printed circuit board. High Engineer View Guide

E12 Pump Fault The circulation pump is blocked or not running. High Engineer View Guide

E13 Condensate Trap Full The condensate trap needs emptying or the drain is blocked. Medium DIY View Guide

E14 Communication Error Internal communication fault between modules. High Engineer View Guide

E15 Flue Temperature Limit Flue gas temperature has exceeded the safe limit. High Engineer View Guide

E16 Gas Pressure Too Low Insufficient gas supply. High Engineer View Guide

E17 Overheat Return Return water temperature too high. High Engineer View Guide

E18 Rapid Temperature Rise Flow temp rising too quickly. High Engineer View Guide

E19 Diverter Fault Valve stuck. Medium Engineer View Guide

E20 Condensate Fault The condensate drain is blocked or frozen. Medium DIY View Guide

E21 eBUS Fault Communication line fault. Medium Engineer View Guide

E22 Outdoor Sensor Outdoor sensor faulty. Low Engineer View Guide

E23 Frost Protection Frost protection running. Medium DIY View Guide

E24 Combustion Error Air/gas outside limits. High Engineer View Guide

E25 EEPROM Error PCB memory error. High Engineer View Guide