Carrier PSV Good Practices, Wshp Troubleshooting, Fault Heating Cooling Possible Cause Solution

Page 55

Moisture Check — To perform moisture check:

Check that connectors are orientated “down” (or as recom- mended by equipment manufacturer).

Arrange harnesses with “drip loop” under motor.

Check if condensate drain is plugged.

Check for low airflow (too much latent capacity).

Check for undercharged condition.

Check and plug leaks in return ducts, cabinet.

Table 38 — Good Practices

DO

DO NOT

Check motor, controls wiring, and connections thoroughly before replac-

Automatically assume the motor is bad.

ing motor.

 

Orient connectors down so water cannot get in. Install “drip loops.”

Locate connectors above 7 and 4 o’clock positions.

Use authorized motor and control model numbers for replacement.

Replace one motor or control model number with another (unless

 

replacement is authorized).

Keep static pressure to a minimum by:

Use high pressure drop filters.

• Using high efficiency, low-static filters.

Use restricted returns.

• Keeping filters clean.

 

• Designing ductwork for minimum static and maximum comfort.

 

• Improving ductwork when replacement is necessary.

 

Size equipment wisely.

Oversize system then compensate with low airflow.

Check orientation before inserting motor connectors.

Plug in power connector backwards.

 

Force plugs.

Table 39 — WSHP Troubleshooting

 

FAULT

 

HEATING

COOLING

POSSIBLE CAUSE

SOLUTION

Main Power Problems

 

X

X

Green Status LED Off

Check line voltage circuit breaker and disconnect.

 

 

 

 

 

 

Check for line voltage between L1 and L2 on the contactor.

 

 

 

 

 

 

Check for 24 vac between R and C on controller.

 

 

 

 

 

 

Check primary/secondary voltage on transformer.

HP Fault — Code 2

 

 

X

Reduced or no water flow in cool-

Check pump operation or valve operation/setting.

High Pressure

 

 

 

ing

Check water flow adjust to proper flow rate.

 

 

 

 

 

 

 

 

 

 

X

Water temperature out of range in

Bring water temperature within design parameters.

 

 

 

 

 

cooling

 

 

 

 

X

 

Reduced or no airflow in

Check for dirty air filter and clean or replace.

 

 

 

 

 

heating

Check fan motor operation and airflow restrictions.

 

 

 

 

 

 

 

 

 

 

 

 

Dirty air coil — construction dust etc.

 

 

 

 

 

 

External static too high. Check blower performance per

 

 

 

 

 

 

Tables 11-13.

 

 

 

X

 

Air temperature out of range

Bring return-air temperature within design parameters.

 

 

 

 

 

in heating

 

 

 

 

X

X

Overcharged with refrigerant

Check superheat/subcooling vs typical operating condition per

 

 

 

 

 

 

Tables 20-30.

 

 

 

X

X

Bad HP switch

Check switch continuity and operation. Replace.

LP/LOC Fault — Code 3

 

X

X

Insufficient charge

Check for refrigerant leaks.

Low Pressure/Loss of

 

X

 

Compressor pump down at start-

Check charge and start-up water flow.

Charge

 

 

 

 

 

 

 

up

 

 

 

 

 

 

 

FP1 Fault — Code 4

 

X

 

Reduced or no water flow

Check pump operation or water valve operation/setting.

Water Freeze Protection

 

 

 

in heating

Plugged strainer or filter. Clean or replace.

 

 

 

 

 

 

 

 

 

 

 

 

Check water flow adjust to proper flow rate.

 

 

 

X

 

Inadequate antifreeze level

Check antifreeze density with hydrometer.

 

 

 

X

 

Improper freeze protect setting

Clip JW2 jumper for antifreeze (10 F) use.

 

 

 

 

 

(30 F vs 10 F)

 

 

 

 

X

 

Water temperature out of range

Bring water temperature within design parameters.

 

 

 

X

X

Bad thermistor

Check temperature and impedance correlation.

FP2 Fault — Code 5

 

 

X

Reduced or no airflow in

Check for dirty air filter and clean or replace.

Air Coil Freeze Protection

 

 

 

cooling

Check fan motor operation and airflow restrictions.

 

 

 

 

 

 

 

 

 

 

 

 

External static too high. Check blower performance per

 

 

 

 

 

 

Tables 11-13.

 

 

 

 

X

Air temperature out of range

Too much cold vent air. Bring entering air temperature within design

 

 

 

 

 

 

parameters.

 

 

 

 

X

Improper freeze protect setting

Normal airside applications will require 30 F only.

 

 

 

 

 

(30 F vs 10 F)

 

 

 

 

X

X

Bad thermistor

Check temperature and impedance correlation.

 

LEGEND

 

 

 

 

LED

Light-Emitting Diode

 

 

 

 

RV

Reversing Valve

 

 

 

 

TXV

Thermostatic Expansion Valve

 

 

 

55

Image 55
Contents Contents Installation, Start-Up, Service InstructionsInstallation Safety ConsiderationsGeneral Physical Data 50PSH, PSV, PSD018-070 Units Typical Installation 50PSH Unit Code Return Discharge CSP ASPBSP CAP50PSV Dimensional Data HWR Hot Water Reheat Left Hand Right Hand A50-7846efBack Discharge Side DischargeMount the Unit Install Condensate DrainTrap Condensate Drain Connection Open Loop and Recirculating Well Water Quality GuidelinesMaterial Metal Hose Minimum Bend Radii Typical Ground-Water Piping InstallationSupply/Return Hose Kit Wire Field Power SupplyAstat Complete C Controller Fault CodesDescription of Operation LED Alarm Relay TransYellow RED Wire NumberBMC ComprLWT ECMUnits with ECM, Complete C and LON Controller 460 A50-8363Units with ECM, Deluxe D and LON Controller 460 A50-8364Hpws SATMves WHSP-OPEN 8354 A508356 LWT Wshp Open Control A50-838050PSH, PSV, PSD Electrical Data PSC High-Static Motor 50PSH, PSV, PSD Electrical Data PSC Motor50PSH, PSV, PSD Electrical Data, ECM Motor Low Voltage Field Wiring Wire Field ControlsField-Supplied Sensors for Wshp Open Controller Rnet Wiring SpecificationsA50-8441 A50-8442A50-8443 Rnet WiringWire Terminal Operate ECM Interface BoardECM Blower Motor Performance Data Setting SizeFPM Rated MIN FANUnit Airflow CFM Speed Size Coil Units with Reheat ESP Loss Face VelocityField Selectable Inputs Complete C Control Jumper SettingsDeluxe D Control Jumper Settings PRE-START-UPVAC DIP Switch Block S2 Accessory 1 Relay OptionsDIP Switch Block S2 Accessory 2 Relay Options Humidistat/Dehumidistat Logic Deluxe D DIP Switch SettingsA50-8145 HWR Operating ModesOperating Limits 50PSH, PSV, PSD Units Unit Start-Up Cooling ModeSTART-UP Operating LimitsWater Flow Temp Unit Start-Up Heating ModeWater Temperature Change Through Heat Exchanger Cooling Heating Water Flow Rate GPM Rise F Drop FGPM/ton Pressure Heat Cooling Rise Drop Psig Flow Flow BACview6 Display Interface Unit Start-Up with Wshp Open ControlsGPM 50PSH, PSV, PSD Water Water Temperature F Flow50PSH, PSV, PSD Coaxial Water Pressure Drop Unit SizeUnits with Aquazone Complete C Control Approximate Fluid Volume gal Per 100 Ft of PipeAntifreeze Percentages by Volume OperationUnits with Wshp Open Multiple Protocol Units with HWR OptionPage Page Complete C and Deluxe D Board System Test LED Status Description of Operation Alarm RelayOff Description Status LED Test LED Complete C Control LED Code Fault DescriptionsLED Code Fault Description Aquazone Deluxe D Control LED IndicaService Replacing the Wshp Open Controller’s Bat TroubleshootingRefrigerant Charging Air Coil Fan Motor RemovalFP1 and FP2 Thermistor Location Page Fault Description Solution ECM TroubleshootingA50-8448 ECM Pin ConnectorsA50-8447 ECM Troubleshooting Flow DiagramTXV Wshp TroubleshootingFault Heating Cooling Possible Cause Solution Good PracticesCode Condensate FaultCode 7 Auto Resetting No Fault Code ShownLow Discharge Air Temperature in HeatingHigh Head Pressure Low Suction PressureAppendix a Wshp Open Screen Configuration Appendix a Wshp Open Screen Configuration Schedules 1 Set PointsWeekly Schedule ExceptionService Appendix a Wshp Screen Open ConfigurationTest Point Name Password Editable Range Default Level Configuration ServiceScreen Name Linkage AlarmPage Page Copyright 2009 Carrier Corporation II. START-UP 50PSH,PSV,PSD START-UP ChecklistA50-8495 Heating Cycle AnalysisCooling Cycle Analysis A50-8494