Carrier Fluid Chiller Problem

[CoolKids]

I attended site re a fault code "43" no water flow fault on a carrier fluid chiller.

I checked the water flow sensor which has a led light configuration on top. When the water recirc pump is running it turns to green. If you switch the pump off it switches to red.

I have checked and made sure the pump interlock is okay on terminals 35-34 located underneath the carrier pro log controller.

Your help would be very much appreicated.

[Brian_UK]

Haven't got a basic water flow switch in circuit as well have they?

[james10]

model/serial?

[CoolKids]

Good Evening

I have checked over the unit and cannot find another water flow switch.

The model is a Carrier 30GK 085 R407c (Air Cooled Fluid Chiller)

[serviceman]

Check the filter water? the water inlet temperature is greater than the output?

[CoolKids]

The water filter is clear. The temperature of the water is the same either side of the evap. The unit faults out before the cooling circuits start.

[serviceman]

which model of machine is? there is a relay that works with the flow switch, check that the contact this cerrado.en fuse panel there are none is damaged Czech

[serviceman]

And KM95A KM90A reviews, if the condenser is cooled by water.

[CoolKids]

Problem solved!!

The water flow sensor had a small amount crap covering it. Problem solved.

Thanks for all your helpfull comments.