Page 117
13 COMBINATION BOILER FAULT FINDING
WARNING: The Combination Boiler fault finding tables (Central Heating and Hot Water) are
to only be used by competent and suitably qualified engineers. It may be necessary to
check live terminals inside the control panel. Extreme care should be taken when doing
so.
13.1 Error codes displayed on the LCD.
Combination Boilers are fitted with diagnostic functions that monitor the correct function of
certain control systems within the appliance.
Error codes are displayed on the LCD, a list of Error codes, their possible causes and
corrective actions are detailed below.
Code
Description Possible Cause (s) Corrective Action (s)
E01 Burner Lockout No fuel supply to burner, air in fuel lines
Burner fault
Consult Service Engineer
E02 High Limit Air Lock in boiler, displaced NTC
Temperature Sensor, circulation problem
Consult Service Engineer
E04 Low System
Pressure
System not topped up after pressure loss
after bleeding radiators etc.
Leak in heating system
Check system pressure, see
Section 1.3, 1.4 & 1.5 then, check
corrosion inhibitor concentration.
E05 Boiler NTC Error
Boiler Flow NTC Temperature Sensor
short circuit or disconnected
Consult Service Engineer
E06 DHW Flow NTC
Error
DHW Flow NTC Temperature Sensor
short circuit or disconnected
Consult Service Engineer
E11* Tank Limit Displaced Tank NTC Temperature
Sensor Probe
Consult Service Engineer
E12 Tank Control
NTC Error
Tank Control NTC Temperature Sensor
short circuit or disconnected
Consult Service Engineer
E15* CH Return NTC
Error
CH Return NTC Temperature Sensor
short circuit or disconnected
Consult Service Engineer
E22 Flash Data
Corrupted
PCB Fault Consult Service Engineer
E31 Remote Control
Communication
Error
Damaged Remote Control cable
Remote Control Fault
Consult Service Engineer
E32 MMI - Control
PCB Error (On
Remote Control)
Damaged cable in control panel
PCB Fault
Consult Service Engineer
E46 System
Pressure
Sensor Error
System Pressure Sensor disconnected
System Pressure Sensor Fault
Consult Service Engineer
E48 High System
Pressure
Filling Loop left connected, and open
Insufficient system expansion capacity
Consult Service Engineer
E62 MMI - Control
PCB Error (On
Boiler)
Damaged cable in control panel
PCB Fault
Consult Service Engineer
To Next Page
Loading...
Need help?
General
