© MHG Heating Ltd
26
MHG Heating Ltd, Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey, KT20 5LR
0845 6448802 Telephone. 0845 6448803 Fax. Email
Website www.mhgheating.co.uk
010908
12.0 Appliance Fault Codes
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.
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
E-60
Faulty Room Sensor
E-61
Faulty Room Sensor
E-62
Incorrect Room Unit Connected
E-77
Air Pressure Sensor Not Detected (Not Used)
E-78
Water Pressure Sensor Defective (Not Used)
E-81
LPB Short Circuit (Boiler Cascade Wiring)
E-82
LPB Address Conflict (Boiler Cascade Settings)
E-86
Short Circuit on PPS Connection
