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ballvalve
09-08-2014, 09:39 AM
Hi
has anyone ever came across this fault code on a water cooled vrv4 system with only two hydro boilers connected

hyperion
09-08-2014, 10:24 AM
This could be an error in the external protection device or activation of the external protection device or an improper field setting. It could depend where the flow switch has been connected.

ballvalve
09-08-2014, 10:30 AM
What would be classed as a external protection.the flow switch is connected through 3 and 4 on the condenser.

hyperion
09-08-2014, 05:20 PM
Maybe a fire alarm interlock or remote time-switch possibly. Possibly a high/low water temperature stat. Electrical interlock with external pump contactor maybe.