Heatcraft Refrigeration Products 25000102 Symptom Cause Remedy Compressor, Does Not Run, Cycles

Page 34

 

 

 

Installation and Operations Manual

 

 

 

SERVICE DIAGNOSIS CHART

 

 

Symptom

 

Cause

 

Remedy

 

 

 

 

 

Compressor

1.

Motor Line open

1.

Close starter or disconnect switch

Does Not Run

2.

Fuse blown

2.

Replace fuse

 

3.

Tripped overload

3.

See electrical section

 

4.

Control contacts dirty or jammed in open position

4.

Repair or replace

 

5.

Piston seized

5.

Remove motor-compressor head, look for broken valve

 

 

 

 

and jammed parts

 

6.

Frozen compressor or motor bearings

6.

Repair or replace

 

 

 

 

 

Unit Short

1.

Control differential set too close

1.

Widen differential

Cycles

2.

Discharge valve leaking

2.

Replace valve plate

 

3.

Motor compressor

3.

Check for high head pressure, tight bearings, seized

 

 

 

 

pistons, clogged air-cooled condenser

 

4.

Refrigerant shortage

4.

Repair leak and recharge

 

5.

Refrigerant over charge

5.

Remove some refrigerant

 

6.

Cycling on high pres. cutout

6.

Check condenser / or non condensable in system

 

 

 

 

 

Compressor

1.

Improperly wired

1.

Check wiring against diagram

Will Not Start -

2.

Low voltage

2.

Check main line voltage - determine location of voltage

Hums

 

 

 

 

 

 

drop

Intermittently

3.

Relay contacts not closing

3.

Check my operating manually. Replace relay if defective

 

 

 

 

 

4.

Open circuit in start-winding

4.

Check stator leads. If leads are all right, replace stator

 

Check stator. If leads are all right, replace stator

 

5.

Stator winding grounded

5.

 

Eliminate cause of excessive pressure

 

6.

High discharge pressure

6.

 

Check oil level. Correct binding

 

7.

Tight compressor

7.

 

 

 

 

 

 

 

Unit Operates

1.

Control contacts sticking in closed position

1.

Clean points or replace control

Long Or

2.

Insufficient refrigerant in system

2.

Check for leaks. Repair and add charge

Continuously

3.

Dirty condenser

3.

Clean condenser

 

4.

Air or non-condensables in system

4.

Purge high point in system

 

5.

Compressor inefficient

5.

Check valves and pistons

 

6.

Improper wiring

6.

Check wiring and correct if necessary

 

 

 

 

 

Fixture

1.

Insufficient refrigerant in system

1.

Check for leaks. Repair and add charge

Temperature

2.

Control set too high

2.

Reset control

Too High

3.

Control wiring loose

3.

Check wiring to control

 

4.

Expansion valve or strainer plugged

4.

Clean or replace

 

5.

Compressor inefficient

5.

Check valves and pistons

 

6.

Expansion valve set too high

6.

Lower setting

 

7.

Iced or dirty coil

7.

Defrost or clean coil

 

8.

Unit too small

8.

Add unit or replace

 

9.

Clogged or small refrigerant lines

9.

Clear line or increase line size

 

10.

Oil logged in system

10.

Remove excessive oil, check refrigerant charge

 

 

 

 

 

High

1.

Refrigerant overcharge

1.

Remove the excess

Discharge

2.

Non-condensables in system

2.

Remove the non-condensables

Pressure

3.

Dirty condenser coil

3.

Clean

 

4.

High side restriction

4.

Check all valves or remove restriction

 

5.

Head pressure control setting

5.

Adjust controls

 

6.

Fan not running

6.

Check electrical circuit

 

 

 

 

 

34

Part # 25000102

Image 34
Contents Parallel Compressor Systems Table of Contents Unit Designation IntroductionInspection Model DefinitionLocation Of Equipment Indoor Clearances System WarrantyRigging Floor & Foundation RequirementsRoof Mounting Location of Equipment OutdoorGround Mounting Unit Vibration IsolationDecorative Fences Unit AccessVertical Clearance Units in PitsRefrigerant Piping Ventilation Requirements Indoor UnitsElectrical Suction P-TrapsRefrigerant Line Insulation Refrigerant Line SupportTable of Values for L Expansion LoopsRef. Line Amount of Expansion Liquid Line Rise in Feet Refrigerant 10’ Pressure Loss of Liquid RefrigerantsEquivalent Feet of Pipe 20’ 25’ 30’ 40’ 50’ 75’ 100’Suction Line at Suction Temperature Weight of Refrigerants in Copper Lines During OperationLine 40F 20F Recommended Line Sizes for R-404A/R-507 Lengths Liquid Line SizeExpansion Valve 100’ 150’ 200’ 25’Suction Line Size Recommended Line Sizes for R-22Capacity 40˚F 20˚F 10˚F Liquid Line Size Suction Temperature 10˚F12 & R-134A 502 507 & R-404A Recommended Remote Condenser Line SizesNet TotalEvacuation Leak Checking, Evacuation and Start-upStart-up Electric Defrost Refrigerant DistributionOff-Cycle Priority I Hot Gas DefrostSystem Superheat Electronic Control SystemSystem Balancing Evaporator SuperheatTypical Voltage Ranges CompressorsCopeland Compressors 4D/6D Solid State Modules Unloader FactorsApproved Copeland Lubricants Oil Safety SwitchOil Charges Carlyle CompressorsPart Load Performance Multipliers Phase Voltage MonitorRequired Differential Pressure for Unloader Operation Sight Glass & Moisture Indicator Sight Glass Safety Relief DevicesHenry Relief Valve Capacity Rating Discharge Piping TableLiquid Level Switch Auto Reset ModelsManual Reset Models Level Switch TableOil Control Module ReplacementOil Separators Temprite Models Temprite Valve AdjustmentOil Level Regulators Liquid Filter-Driers & Suction Filters Troubleshooting Oil SystemAC&R Model Regulators Sporlan Valve CoSporlan Valve Company CompressorMotorBurnoutCleanupProcedureSuction Filter Replaceable Suction FilterSuperior Valve Company Type DF for cleanupType AFD for cleanup Type F FilterHot Gas Bypass Regulator Adjustment Recommended Valve SettingsField Adjustment Liquid Drain Control MethodControl Settings for R-22 Control SettingsControl Settings for R-404A/R-507 Low Pressure Switch Setting for RmccMonthly General Maintenance ScheduleWeekly QuarterlyDoes Not Run Symptom Cause Remedy CompressorTemperature Unit ShortHigh Suction Symptom Cause Remedy LowSwitch Open Low SuctionService Record System Reference Data