Lochinvar CP-M Series User Manual

89
Display message R e t u r n t e m p h i g h
9 9 9 , 5 h r s
Reason
Cause:
An external heat source (CHP, heat pump etc.) has heated the return temperature above the blocking temperature.
Corrective Action:
Reduce pre heat temperature of the external heat source.
Cause:
The external heating controls suddenly close causing excessive return water temperature.
Corrective Action:
Dampen the reaction time of the external heating control system to prev ent sudden boiler temperature rise.
Display message F l u e t e m p h i g h
9 9 9 , 5 h r s
Reason The flue gas temperature has exceeded the blocking temperature.
Cause:
Heat exchanger polluted and not able to effectively transfer heat to the system water.
Corrective Action:
Check and clean the heat exchanger.
Cause:
Defective (partially shorted) flue gas sensor or sensor connection.
Corrective Action:
Cause:
There is no water in the unit while firing.
Corrective Action:
Cause:
Heat exchanger failure.
Corrective Action:
Display message A n t i c y c l e t i m e
9 9 9 , 5 h r s
Reason
Cause:
System water temperature cooling and causing a heat demand within the anti-cycling time period.
Corrective Action:
Dampen external heating system controls to slow down the cooling time of the heating medium (water).
Increase system volume to act as a buffer between the boiler circuit and heating circuit.
Cause:
Rapid opening and closing of external thermostat
Corrective Action:
Check switching differential of on/off thermostat
The return temperature has exceeded the blocking temperature but not the lock-out
temperature.
Check for moisture in the sensor connections or replace sensor.
Bleed all air from the unit so the heat from combustion can be transferred to the water and won't leav e through the flue
Contact Lochinv ar Limited for further guidance.
The controller received a new heat demand too soon after the last heat demand finished.

Lochinvar CP-M Series Specifications

General

Brand	Lochinvar
Model	CP-M Series
Category	Boiler
Language	English