Breezair RPA 400 - 1500 Series Maintenance Manual - MCS

4TROUBLESHOOTING (Cont.)PROBLEM PROBABLE CAUSE SUGGESTED REMEDYPump runs but does not Insufficient water in tank causing Adjust float level to increase watercirculate water or pads pump to suck air. depth.lack water.Pump strainer clogged or dirty.Clean strainer.Blocked water supply tubing.Blocked water distributor at topof pad frames.Clean the tubing.Clean out the water trough.Continuous overflow of Incorrect float valve adjustment. Adjust float valve.waterInlet valve not sealingReplace valveNoisy air conditioner. Fan rubbing on housing. Reposition fan.Fan out of balance due to dirt,bent blade, etc.Air conditioner delivering more airthan required.Belt “squelching”.Belt “squealing”.Inadequate sized ducts or grilles.Loose water distribution connections.Clean fan, adjust blades ifpossible: Replace fan.Adjust any baffles or balance flowto reduce airflow.Adjust alignment of motor andpulleys.Tighten belt by adjusting motorplatform. Replace belt.Increase grille sizes.Tighten all connections.Water being thrown into Break in water distribution system. Replace any cracked or brokenthe area being cooled.tubing.Cooling pads not properly installedinto pad frames, or sagging.Old cooling pads have developed‘thin’ spots.Cooling pad fibre sticking through nettingcausing water to be sucked off pad.Too much water to pads.Ensure cooling pads are correctlyinstalled.Replace with new cooling pads.Remove any fibres protrudingthrough netting.Check Restrictor Tap setting.Unpleasant odor. Air-conditioner located near the source Relocate the Air-conditioner orof unpleasant odor.remove the odor source.New Pads fittedAlgae in tank water.Will go after short time.Drain tank and clean thoroughly, fillwith fresh water and install new pads.Pad remains wet after shutdown. Allow fan to run for a further 10minutes after pump has been shutoff.Formation of white High mineral content in water supply. Increase the bleed rate.deposits in tank andon pads.Information extracted from Booklet 601540/h.