Carrier PSV, PSD006-070, 50PSH instruction manual ECM Troubleshooting, Fault Description Solution

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IMPORTANT: Always recover the refrigerant from the system with suitable approved tools, recovery equipment, and practices prior to attempting to remove or repair any TXV.

IMPORTANT: Due to the hygroscopic nature of the POE oil in Puron refrigerant (R-410A) and other environ- mentally sound refrigerants, any component replace- ment must be conducted in a timely manner using caution and proper service procedure for these types of refrigerants. A complete installation instruction will be included with each replacement TXV/filter drier assem- bly. It is of critical importance these instructions are carefully understood and followed. Failure to follow these instructions can result in a system that is contami- nated with moisture to the extent that several filter drier replacements may be required to properly dry the system.

IMPORTANT: Repair of any sealed refrigerant system requires training in the use of refrigeration tools and proce- dures. Repair should only be attempted by a qualified ser- vice technician. A universal refrigerant handling certificate will be required. Local and/or state license or certificate may also be required.

See Tables 37-39 for additional troubleshooting information.

CAUTION

Disconnect power from unit before removing or replacing connectors, or servicing motor. Wait 5 minutes after dis- connecting power before opening motor.

Table 37 — ECM Troubleshooting

FAULT

DESCRIPTION

SOLUTION

Motor rocks slightly when

 

This is normal start-up for ECM.

starting

 

 

Motor will not start

No movement

Check power at motor.

 

 

Check low voltage (24-vac R to C) at motor.

 

 

Check low voltage connections (G,Y, W, R, C) at motor.

 

 

Check for unseated pins in connectors on motor harness. See Fig. 40.

 

 

Test with a temporary jumper between R and G.

 

 

Check motor for tight shaft.

 

 

Perform motor/control replacement check.

 

 

Run moisture check. See Moisture Check section in Troubleshooting.

 

Motor rocks

Check for loose or non-compliant motor mount.

 

 

Make sure blower wheel is tight on shaft.

 

 

Perform motor/control replacement check.

Motor oscillates up and down

 

It is normal for motor to oscillate with no load on shaft.

while being tested off of blower

 

 

Motor starts, but runs erratically

Varies up and down or intermittent

Check line voltage for variation or “sag.”

 

 

Check low voltage connections (G,Y, W, R, C) at motor, unseated pins in motor harness

 

 

connectors. See Fig. 40.

 

 

Check “Bk” for erratic cfm command (in variable speed applications).

 

 

Check system controls, thermostat.

 

 

Perform moisture check. See Moisture Check section in Troubleshooting.

 

“Hunts” or “puffs” at high cfm

If removing panel or filter reduces “puffing,” reduce restriction or reduce maximum airflow.

 

(speed)

 

 

Stays at low cfm despite system

Check low voltage (thermostat) wires and connections.

 

call for cool or heat cfm

 

 

 

Verify fan is not in delay mode. Wait until delay is complete.

 

 

Check to see if “R” is missing/not connected at motor.

 

 

Perform motor/control replacement check.

 

Stays at high cfm

Check to see if “R” is missing/not connected at motor.

 

 

Verify fan is not in delay mode. Wait until delay is complete.

 

 

Perform motor/control replacement check.

 

Blower will not shut off

Check to see if there is current leakage from controls into G, Y, or W. Check for Triac switched

 

 

thermostat or solid state relay.

Excessive noise

Noisy blower or cabinet

Determine if it is air, cabinet, duct, or motor noise.

 

 

Check for loose blower housing, panels, etc.

 

 

If high static is creating high blower speed, check for air whistling through seams in ducts,

 

 

cabinets, or panels.

 

 

If high static is creating high blower speed, check for cabinet/duct deformation.

 

“Hunts” or “puffs” at high cfm

If removing panel or filter reduces “puffing,” reduce restriction or reduce maximum airflow.

 

(speed)

 

Evidence of moisture

Motor failure or malfunction has

Replace motor and perform moisture check. See Moisture Check section in Troubleshooting.

 

occurred and moisture is present

 

 

Evidence of moisture present

Perform moisture check. See Moisture Check section in Troubleshooting.

 

inside air mover

 

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Contents Installation, Start-Up, Service Instructions ContentsInstallation Safety ConsiderationsGeneral Physical Data 50PSH, PSV, PSD018-070 Units Typical Installation 50PSH Unit ASP BSPCAP Code Return Discharge CSP50PSV Dimensional Data A50-7846ef HWR Hot Water Reheat Left Hand Right HandSide Discharge Back DischargeInstall Condensate Drain Mount the UnitTrap Condensate Drain Connection Open Loop and Recirculating Well Water Quality GuidelinesMaterial Typical Ground-Water Piping Installation Metal Hose Minimum Bend RadiiWire Field Power Supply Supply/Return Hose KitComplete C Controller Fault Codes Description of Operation LED Alarm RelayTrans AstatWire Number BMCCompr Yellow REDECM LWTA50-8363 Units with ECM, Complete C and LON Controller 460A50-8364 Units with ECM, Deluxe D and LON Controller 460Hpws SATMves WHSP-OPEN A50 83548356 LWT A50-8380 Wshp Open Control50PSH, PSV, PSD Electrical Data PSC Motor 50PSH, PSV, PSD Electrical Data PSC High-Static Motor50PSH, PSV, PSD Electrical Data, ECM Motor Wire Field Controls Low Voltage Field WiringRnet Wiring Specifications A50-8441A50-8442 Field-Supplied Sensors for Wshp Open ControllerRnet Wiring Wire TerminalOperate ECM Interface Board A50-8443Setting Size ECM Blower Motor Performance DataRated MIN FAN Unit Airflow CFM Speed SizeCoil Units with Reheat ESP Loss Face Velocity FPMComplete C Control Jumper Settings Deluxe D Control Jumper SettingsPRE-START-UP Field Selectable InputsDIP Switch Block S2 Accessory 1 Relay Options DIP Switch Block S2 Accessory 2 Relay OptionsHumidistat/Dehumidistat Logic Deluxe D DIP Switch Settings VACHWR Operating Modes A50-8145Unit Start-Up Cooling Mode START-UPOperating Limits Operating Limits 50PSH, PSV, PSD UnitsUnit Start-Up Heating Mode Water Temperature Change Through Heat ExchangerCooling Heating Water Flow Rate GPM Rise F Drop F Water Flow TempGPM/ton Pressure Heat Cooling Rise Drop Psig Flow Flow Unit Start-Up with Wshp Open Controls BACview6 Display Interface50PSH, PSV, PSD Water Water Temperature F Flow 50PSH, PSV, PSD Coaxial Water Pressure DropUnit Size GPMApproximate Fluid Volume gal Per 100 Ft of Pipe Antifreeze Percentages by VolumeOperation Units with Aquazone Complete C ControlUnits with HWR Option Units with Wshp Open Multiple ProtocolPage Page Complete C and Deluxe D Board System Test LED Status Description of Operation Alarm RelayOff Complete C Control LED Code Fault Descriptions LED Code Fault DescriptionAquazone Deluxe D Control LED Indica Description Status LED Test LEDService Troubleshooting Refrigerant ChargingAir Coil Fan Motor Removal Replacing the Wshp Open Controller’s BatFP1 and FP2 Thermistor Location Page ECM Troubleshooting Fault Description SolutionECM Pin Connectors A50-8448ECM Troubleshooting Flow Diagram A50-8447Wshp Troubleshooting Fault Heating Cooling Possible Cause SolutionGood Practices TXVCondensate Fault Code 7 Auto ResettingNo Fault Code Shown CodeTemperature in Heating High Head PressureLow Suction Pressure Low Discharge AirAppendix a Wshp Open Screen Configuration Appendix a Wshp Open Screen Configuration Set Points Weekly ScheduleException Schedules 1Service Appendix a Wshp Screen Open ConfigurationTest Point Name Password Editable Range Default Level Configuration ServiceScreen Name Alarm LinkagePage Page Copyright 2009 Carrier Corporation 50PSH,PSV,PSD START-UP Checklist II. START-UPHeating Cycle Analysis Cooling Cycle AnalysisA50-8494 A50-8495