Module Operating Codes; Appliance Error Codes - MHG Heating ProCon HT Installation And Operating Manual

13.0 Appliance Error Codes

If a fault is encountered within the appliance or Cascade LPB network, a fault code will
be generated and displayed by the failing module and all LPB networked RVS43 143
Cascade Managers.
If a fault is encountered by a module the respective code will be displayed along with a
flashing LED.
Three digit codes will be displayed in two consecutive sections. I.e. 1-53 = 153.
If a fault is encountered by a RVS43 143 Cascade Manager or communicated to a RVS43
143 Cascade Manager 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 module the unit can be reset by pressing the Lockout
Reset Button (9) for at least 3 seconds.
If the fault is related to a RVS43 143 Cascade Manager 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 module 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 (Not Used in ProCon Configuration)
E-91 EEPROM
E-92 Hardware Malfunction
E-100 Conflict Between Time of Day Master Control (Boiler / QAA70 / RVS43 143)
E-105 Annual Service of Unit is Due.
E-110 Module Water Temperature Overheat
E-111 Module Temperature Too High (Auto Resetting)
E-113 Flue Gas Temperature overheat (Not Used)
E-117 High System Water Pressure Sensor (Not Used)
E-118 Low System Water Pressure Sensor (Not Used)
E-119 System Water Pressure Switch Activated (Below 0.8 bar)
E-124 Module Temperature Too High (Auto Resetting)
E-128 Flame Extinguished During Operation (LMU Version D)
MHG Heating Ltd, Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey, KT20 5LR
P:0845 6448802 F:0845 6448803 E:
© MHG Heating Ltd
(QAA73 Service Tool Required to reset timer See Section 16.0)
info@mhgheating.co.uk
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