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Hvac CVH8, Руководство по обслуживанию

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CVH8, HVH8, TVH8, VA9, HVA9, TVA9: APPLICATION GUIDELINE & SERVICE MANUAL

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

26

COMPRESSOR POWER HARNESS ASSEMBLY 

REPLACEMENT

The  following  is  a  recommended  procedure  for  compressor  power

harness  replacement.    Always  refer  to  the  unit  product  installation,

start-up & service instructions for detailed procedures.

Replacement Procedure

1. Follow all safety warnings and notices. 
2. Precautions must be taken when servicing components within the

control box of this unit. The technician performing the service must

determine  that  it  is  safe  to  work  on  or  near  the  inverter.  The

electrical disconnect that provides power to the unit must be turned

off,  locked  and  tagged  out. This  will  insure  that  no  damage  will

occur to the inverter, controls or other equipment and will prevent

injury  if  contact  is  made  with  the  electrical  equipment.  Wait  a

minimum of two minutes before servicing the unit to allow inverter

capacitors to discharge. Follow safety instructions located on unit

control box cover.

3. Remove the control box cover. 
4. Disconnect compressor power harness from inverter.
5. Remove service panel to gain access to unit wiring and compressor

compartment. 

6. Cut  the  wire  tires  securing  the  compressor  power  harness  to  the

control box. Remove compressor power harness (from control box).

Replace wire tie with supplied wire tie; do not fasten at this time.

The  second wire tie for the  choke on the  compressor  is supplied

with new harness on the replacement compressor (highlighted with

the yellow circles below).

A210659

7. Remove  top  two  screws  holding  control  box  and  remove

compressor harness (highlighted in yellow below).

A210660

8. Cut  double  loop  wire  tie  on  suction  tube  holding  compressor

harness, replace with new one provided; do not fasten at this time.

Note  how  the  compressor  harness  is  routed  to  suction  tube.

(Highlighted in yellow below)

A210661

WARNING

!

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Turn off and lock out all power to unit before proceeding.   Discharge

all capacitors before proceeding

All wiring and electrical connections shall comply with all local and

national electrical codes.

WARNING

!

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

failure to follow this warning could result in personal injury.

Do  not  operate  compressor  or  provide  any  electrical  power  to  the

compressor unless the terminal box cover is in place and secured. 

Measurements  of  amps  and  volts  during  running  conditions  must  be

taken at other points in the power supply.

Do  not  provide  any  power  to  the  compressor  unless  suction  and

discharge service valves are open.

Содержание CVH8

Страница 1: ...safety glasses protective clothing and work gloves Use quenching cloth for brazing operations Have fire extinguisher available Read these instructions thoroughly and follow all warnings or cautions in...

Страница 2: ...7 8 9 10 11 12 Example Part Number V A 9 24 G K A 1 0 0 Brand V Variable Speed KEY CHARACTERISTIC A Air Conditioner H Heat Pump TYPE 6 16 SEER 7 17 SEER 8 18 SEER 9 19 SEER NOMINAL EFFICIENCY 24 24 00...

Страница 3: ...t of comfort with the convenience of fingertip trouble shooting and diagnostic capability These units can also use a standard 2 stage or single stage thermostat for limited functionality ELECTRICAL Ta...

Страница 4: ...field electrical connections for tightness This should also be done after unit has reached operating temperatures especially if aluminum conductors are used Unit Electrical Power Power wires from the...

Страница 5: ...h cooling and dehumidification As the building load increases the motor will increase speed until it is at maximum speed at the maximum building load At unit start up there is a slight delay and thrus...

Страница 6: ...ommunication The green LED will be turned off when using a standard 2 stage non communicating heat pump thermostat Amber Status Light Amber colored STATUS light indicates operation and error status Se...

Страница 7: ...80ft 24 4 m or less allow system to operate in cooling mode at least 25 minutes If conditions are favorable check system charge by subcooling method If any adjustment is necessary adjust charge slowly...

Страница 8: ...n Cooling Mode CVH8 HVH8 TVH848 A200333 Fig 14 Charging in Cooling Mode CVH8 HVH8 TVH860 Table 5 Required Charge Adjustment for Indoor Coil Model AC Furnace Coil or Fan Coil Model 24 25 36 37 48 49 60...

Страница 9: ...echarge refer to the unit rating plate and indoor fan coil furnace coil per Table 4 and Table 5 for additional charge needed Refrigerant charge adjustment amount for adding or removing 0 6 oz ft 17 74...

Страница 10: ...tify the type and size of unit to the control On new units the model and serial numbers are inputted into the AOC board s memory at the factory If a model plug is lost or missing at initial installati...

Страница 11: ...alant before the cap is reinstalled The factory RTV can be reused as long as none of it has been removed during the cap removal 8 Reinstall compressor sound blanket making sure discharge thermistor an...

Страница 12: ...stage occurs suction pressure is checked at each stage in between current and demanded stage This is to prevent ramping of compressor speed too quickly and creating a low pressure situation As long as...

Страница 13: ...istor comparisons are not performed during low ambient cooling or defrost operation Failed Thermistor Default Operation Factory defaults have been provided in the event of failure of outdoor air therm...

Страница 14: ...d Damaged Model Plug Check model plug for corrosion or breakage replace if necessary Check Model Plug resistance per the wiring diagram Model Plug not fully engaged on board Align per the silkscreen l...

Страница 15: ...ity see resistance chart to check resistance at given temperature Broken or Damaged Sensor Check harness for continuity see resistance chart to check resistance at given temperature Hardware damage to...

Страница 16: ...eading to gage reading at service valve see transducer measurement chart Check system for electrical shorts and correct replace transducer Heat damage during brazing Compare transducer reading to gage...

Страница 17: ...STAGE 2 WARMUP DELAY 10 Minutes Both High voltage power cycle No action 69 System Malfunction INVERTER COMPRESS OR INTERNAL FAULT Elevates to this fault code after 5 hidden occurrences of itself 15 M...

Страница 18: ...ow too low or off Troubleshoot outdoor fan motor and make sure it is working Reversing Valve Bypass or Reversing Valve not energized Reversing Valve stuck halfway Ensure AOC fuse is good 24 VDC in coo...

Страница 19: ...Incoming power supply voltage Check voltage versus unit rating plate for allowable range Loose or incorrect wire connections Check incoming power leads and leads to the compressor plug 79 Local COMPR...

Страница 20: ...ction Cool Restriction in Circuits or Tubing Repair restriction Heat EXV Malfunction Troubleshoot EXV see guide below Heat Service Valve left closed Liquid Service Valve Ensure Liquid Service Valve is...

Страница 21: ...ndoor coil or filter for restriction debris and clean if necessary Heat Furnace plus Heat pump application Furnace stuck on If not in Defrost and Furnace is running same time as heat pump troubleshoot...

Страница 22: ...ent heating or high ambient cooling Over charge Check system charge Inverter damage Replace inverter 91 Local INVERTER VDC OUT OVER VOLTAGE EVENT Elevates to fault code 97 after 5 occurrences 5 Minute...

Страница 23: ...rter will reduce speed to a lower stage Both Refer to fault code 99 99 System Malfunction HIGH TORQUE LOCKOUT Elevated from fault code 98 when 98 occurs at lowest stage 2 hours Cool Overcharged System...

Страница 24: ...olt connection status OK between AOC and MOC Off No Power Table 12 AOC LED Descriptions Sizes 25 36 37 48 49 AND 60 Reference Color Status Description STATUS Amber Steady On AOC status standby mode Bl...

Страница 25: ...Table 16 AOC LED Descriptions Size 24 Reference Color Status Condition Description STATUS Amber Steady On Normal AOC status standby mode Blinking Abnormal AOC function fault status COMM Green Steady...

Страница 26: ...res securing the compressor power harness to the control box Remove compressor power harness from control box Replace wire tie with supplied wire tie do not fasten at this time The second wire tie for...

Страница 27: ...pushing one side down then the other NOTE DO NOT SCRAP SEALANT A210665 13 Reinstall compressor sound blanket making sure discharge thermistor and compressor power harness are routed as they were from...

Страница 28: ...and Black 8 Disconnect fan motor power harness plug 9 Disconnect reversing valve PEV plug See Figure Below 10 Disconnect high pressure switch plug 11 Disconnect EXV plug 12 Disconnect suction pressure...

Страница 29: ...MANUAL Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 29 A210667 Fig 32 Compressor and Fan Harness Unit sizes 25 36 37 48 49 an...

Страница 30: ...E MANUAL Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 30 A210669 Fig 34 Wire Harness Connections Unit sizes 25 36 37 48 49 an...

Страница 31: ...control box Replace wire tie with one supplied do not fasten at this time The second wire tie for the choke on the compressor is supplied with new harness on the replacement compressor highlighted wi...

Страница 32: ...that terminal cover remain installed during compressor installation 15 Using caution and the appropriate lifting device place replacement compressor in unit and secure with appropriate mounting hardw...

Страница 33: ...icates clean system 28 Check system for normal operation If unit is a heat pump switch from heating to cooling a few times to verify component operation Severe Burnout Perform steps 1 22 as specified...

Страница 34: ...VICE MANUAL Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 34 WIRING DIAGRAMS VA9 A160127 Fig 36 VA9 WIRING DIAGRAM Size 24 A16...

Страница 35: ...ICE MANUAL Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 35 WIRING DIAGRAMS VH8 A160129 Fig 38 VH8 WIRING DIAGRAM Size 24 A160...

Страница 36: ...still hot 2 Silver brazing alloy is used on copper to brass copper to steel or copper to copper Flux is required when using silver brazing alloy Do not use low temperature solder 3 Fluxes should be u...

Страница 37: ...at completion of the procedure Attach recovery system or vacuum pump to gauge set as needed for the service procedure The service valves must be open to evacuate the unit through the line set service...

Страница 38: ...ave a bleed port Therefore minimal equalization takes place after shutdown TXVs are specifically designed to operate with R 410A or R 22 refrigerant use only factory authorized TXV s Do not interchang...

Страница 39: ...em Pour and measure oil quantity if any from old accumulator If more than 20 percent of oil charge is trapped in accumulator add new POE oil to compressor to make up for this loss REFRIGERATION SYSTEM...

Страница 40: ...replace liquid line filter drier evacuate system and recharge with correct refrigerant quantity Coil Removal Coils are easy to remove if required for compressor removal or to replace coil 1 Shut off...

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