Internal Wiring; Module Control Indication (Oci420 Communication Clip Led) - MHG Heating ProCon HT Installation And Operating Manual

18.0 Internal Wiring

The internal wiring configurations of the ProCon HT 150/225 differ dependant upon the
model. Single/Cascade Manager/Cascade Slave.
In all but the Cascade Slave units a RVS43 143 Cascade Manager is installed. The RVS43 143
Cascade Manager Communicates with the individual LMU64 module controllers via the LPB
wiring loom.
In the case of the Cascade Slave unit the LPB wiring is in place, however the control
communication is generated by the RVS43 143 Cascade Manager housed in the Cascade
Master boiler.
18.1 Module Operation Indication
Communication Operation Indications
The RED LED on the OCI420 communication clip mounted on the front of each LMU64
module controller flashes to indicate the detected operational status of the module dictated
by the LPB communication from the ProCon HT Masters RVS43 143 Cascade Manager.
LED FLASH STATUS
LED ON Constantly
LED OFF Constantly
LED ON 93% OFF 7%
LED ON 5% OFF 95%
LED ON 5% OFF 20% ON 5% OFF 70%
MHG Heating Ltd, Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey, KT20 5LR
P:0845 6448802 F:0845 6448803 E:
© MHG Heating Ltd
INTERPRETATION OPTIONS
OCI420 not configured to operate with LMU64
OCI420 Configured. LPB Short Circuit / No Power.
OCI420 and LUM64 Not Compatible / LPB Address inadmissible.
Boiler being controlled via LPB and required to be not
operating.
Boiler being controlled via LPB and required to be operating.
info@mhgheating.co.uk
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