© MHG Heating Ltd
46
MHG Heating Ltd Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR
Telephone 08456 448802 Fax 08456 448803 Email
Web www.mhgheating.co.uk
010711
14.0 Appliance Fault Codes
The ProCon range has two levels of fault code indication.
Automatic Resetting Fault Code.
A small fault code alternating with the time of day.
The appliance will stop operating for a limited period/until the error has been corrected.
Repeated occurrences of an Automatic Resetting Fault Codes will result in a Manual Reset Fault
Code.
Manual Reset Fault Code.
A large fault code is displayed on the screen along with the
symbol.
The appliance will stop operating until the error has been corrected and the RESET button has
been pressed.
PLEASE NOTE.
If the RESET button is pressed when a small fault code is displayed or no fault code is displayed the
unit will display a Manual Reset Fault Code of E153 will be displayed. The RESET button must be
pressed again to clear this code.
If a fault is encountered within the appliance or Cascade LPB network, a fault code will be generated
and displayed by the failing appliance and all LPB networked RVA and Opentherm units .
If a fault is encountered by a RVA controller or is communicated to a RVA controller via the LPB
network ER will be generated on the display.
Opening the controllers flap and pressing the Down PROG button twice will gain access to parameter
line 50 where the generated fault code can be reviewed.
In either case the fault code should be noted for future reference.
If the fault is related to a specific appliance the unit can be reset by pressing the Lockout Reset Button.
If the fault is related to a RVA controller or the LPB communication network the fault code will clear
automatically following the rectification of the fault.
This is also applicable following the rectification of any appliance fault. This can take up to 10 minutes.
Fault Code
Description
E-0
No Error Detected
E-10
Outside Air Sensor Fault / Not Detected
E-20
Flow Water Sensor Fault / Not Detected
E-26
System Flow Sensor Faulty / Not Detected
E-28
Flue Gas Sensor Fault / Not Detected
E-40
Return Water Sensor Fault / Not Detected
E-46
System Return Water Sensor Fault / Not Detected
E-50
HWS Sensor Short Circuit 1
E-52
HWS Sensor Short Circuit 2 (Not Used)
E-58
HWS Volt Free Switch Fault / Not Detected
