Refco Combi 3004146 - Troubleshooting; Common Faults and Solutions

Instruction manual Combi English
17
Fault Correction
No LED lights Check for incoming voltage. The blue and brown wires are for power.
Pump runs constantly Check󰊟lterplacement.Thewater󰊟ltershouldnottouchthedigitalsensor.
Check the digital sensor for dirt, mold or debris. Clean with water.
 Checkalltubingconnectionsandensuretheyare󰊟rmlypressedontheconnectionbarbsandsecured
using cable ties. Check the entire drain line for clogs, kinks or the tube being pinched.
 Ifthepumpisrunningconstantlyandwateris󰊠owingfromtheendofthedrainlinethenyouneedto
change the dip-switch power settings to increase the pump’s capacity. The system has too much water
or lift for the pump’s current power setting.
A/C unit is o󰈚 Check the pump LED status light. If it’s solid red (not blinking) AND the alarm wiring is connected pro-
perly, then the pump alarm relay is intentionally stopping the A/C unit from running. This prevents water
 over󰊠owandpossiblewaterdamage.Thisisthecorrectfunctionofacondensatepumpalarmrelay.
If the alarm wiring has been used, check the HRC alarm fuse for continuity using a multimeter and
replace it if necessary. Glass fuses can be inspected visually.
If the alarm wiring has been used, check that the pump is in Default Mode.
If the alarm wiring has been used and the wiring is correct, check the status LED; if it is OFF, with no LED
lights at all, then there is a fault either with the power main supply to the pump or with the pump itself.
During alarm status the pump itself will continue to run to decrease the water level even when the A/C
unit is not running. Once the water level is low enough, the pump will automatically reset the alarm
 relaytore-connectpowerbacktotheA/Cunit.Pleasenote:ManyoutdoorA/Cunitshavea5min.time
delay before they turn on the compressor and resume normal cooling operation.
Alarm is activated If the alarm is activated (LED is solid red), the pump has too much incoming water for it to keep up.
Once the water level gets too high on the digital sensor it will trip the alarm relay and stop power to the
A/C system. (Only if the alarm wiring is used). The drain line could be blocked, kinked or pinched. You
may have incorrect capacity settings on the pump relative to the capacity of the A/C unit and or a high
lift vertical run.
Water is dripping Check to ensure the alarm cable is correctly installed according to the appropriate wiring diagrams.
 Pleasenote:Therearedi󰊞erentdiagramsaccordingtodi󰊞erenttypesofA/Csystems.
 Ifthealarmisnotusedandthedrainlinegetsblocked,kinkedorclogged,thepumpcanover󰊠ow.This
is why you should always use the alarm function.
Check all your hose connections. If you have a high head pressure (long vertical run), the water pressure
 canblowahoseo󰊞itsbarb.Thisiswhyyoushouldalwaysusethefactorysuppliedcableties.
Pump is noisy Checkthe󰊟lterplacement.Ifthewater󰊟lteristouchingthedigitalsensor,thedigitalsensormay
believe it is water and activate the pump causing it to run dry when it should not be running at all.
 Cleanthedigitalsensorandthe󰊟lterwithwater.
 Con󰊟gurepumpcapacitycorrectlyaccordingtotheA/Ccapacityandliftriseandrunofthedrainline.
(See dip-switch settings in installation instructions).
Slurping or gurgling Checkforandcorrectasiphoninthedrainline.(Reviewsiphonspeci󰊟cinstructionsheet).Ifthedrain
line extends below the level of the pump, when the pump shuts down, the weight of the water remaining
 inthedrainlinewillcreateasiphone󰊞ectwhichwillsuckwaterawayfromthepumpcausingthepump
to start and run dry until reprimed with water. This can cause slurping and gurgling noises. Correctly
install your drain line to prevent a siphon from occurring.
LED lights 󰈜ash Immediately on initial power-up the pumps will always have a LED start sequence 5x and then go into
standby (blinking green). This is normal operation. This LED start sequence is the only indication
 ofwhetherthealarmiscurrentlycon󰊟guredforDefaultModeorPeripheralMode.Thealarmrelayisuser
 con󰊟gurableandcanbechangedbackandforth.(Seewiringdiagraminstructions).
3 red & 3 green Thisisthepumprecon󰊟gurecode.Thepumpisaskingforhelp!Ifithashad3consecutivelongrun
LED 󰈜ashes cycleswhereitwentfromstandbymodeallthewayintoalarmmode,itisaskingtobere-con󰊟guredfor
 morepowerasitscurrentdip-switchpowersettingsaretoolowfortheincomingwater󰊠ow,liftorboth.
 Giveitmorepowerbyrecon󰊟guringthedip-switchsettings.Thisrecon󰊟gurecodewillonlyappearafter
3 consecutive long run cycles that went into alarm mode.
Troubleshooting