Bryant Evolution Extreme 186CNV Service Manual Download Page 40

Page: 40 / 40

A Carrier Company

Edition Date: 06/20

Catalog No: SM186CNV-284ANV-01

Replaces: NEW

186CNV / 284ANV: Service Manual

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

Summary of Contents for Evolution Extreme 186CNV

Page 1: ...nt Low Fan Speed 9 Fan Operating Exceptions 9 Cooling Control 9 Heating Control 9 Super Heat Control 9 Defrost Mode 9 Defrost Interval 10 Defrost Process 10 PCM Indicators and Display Operation 10 Sta...

Page 2: ...ves a Seasonal Energy Efficiency Ratio SEER of up to 24 and up to 13 Heating Seasonal Performance Factor HSPF and the AC achieves up to 26 SEER To ensure all of the above technology provides the ultim...

Page 3: ...not controlled relative to the phase of the power provided by the transformer in the indoor equipment Rh Wiring requirements in this manual do not connect Rc and Rh together For any non standard wiri...

Page 4: ...any time specifications and designs without notice and without obligations 4 Fig 2 Compressor Fan Sub System Diagram Fig 3 Wiring Diagram 186CNV 284ANV Model sizes 2 5 tons 208 230 1 FILTER REACTOR S...

Page 5: ...0 rpm to 800 rpm depending on air movement requirements The fan on board VFI will automatically limit fan speed if fan load current reaches operating limits Crankcase Heater Some equipment has a crank...

Page 6: ...sure that Rc and Rh are not connected together Doing so may result in destroying one or both of the transformers in this and the internal equipment PCM Indicators and Matrix Display The PCM contains t...

Page 7: ...he right to change at any time specifications and designs without notice and without obligations 7 A200049 A200044 Fig 7 PCM Control Board Bluetooth Service Port Status LED Yellow CCN Communication LE...

Page 8: ...alve for regulating refrigerant flow during heating operation The EXV H is driven by a 12VDC 2 phase uni polar stepper motor The EXV H has a 475 step range between fully closed and fully open The PCM...

Page 9: ...oor equipment and under charged or over charged systems Sump Heat When the compressor is not running the compressor sump may need to be heated to prevent liquid refrigerant from collecting in the sump...

Page 10: ...e Comm light is On then communication has been received within the last 2 minutes and the equipment is operating in normal communication mode If the Comm light is Off then communication has not been r...

Page 11: ...No code will be displayed if the most recent highest priority diagnostic code occurred more than 240 hours of equipment operating time before entering recall mode No code will be displayed if there ha...

Page 12: ...nd indoor fan for proper operation Low Pressure Protection The equipment monitors suction pressure relative to low pressure limits Low pressure limits are compressor speed and model dependent If the c...

Page 13: ...oil Temperature OCT Thermistor The OCT thermistor provides the coil liquid line temperature to the PCM where it is used primarily for defrost control The OCT thermistor is located on an extension tube...

Page 14: ...dentical Either pressure transducer can connected to either input The software in the PCM detects which transducer is connected to which input and assigns the signals accordingly Signals used by contr...

Page 15: ...s received by PCM If this fault is active inspect PCM to Bluetooth module harness and ensure both ends are fully seated on board header Also inspect and repair any wire damage on harness If no green o...

Page 16: ...This code will be set if fuse 2 is blown or missing on PCM board Fuse 2 only powers the LLS When this fault is active the system will not operate The code will clear once fuse is replaced with new un...

Page 17: ...connections wire damage and wire order This code indicates that the VFD is not able to rotate the compressor rotor enough to complete starting process indicating compressor damage or high pressure dif...

Page 18: ...equired from compressor and VFD The PEV will open 2 5 minutes after compressor shutdown if pressure differential is between 200 300psi or if pressure differential is greater than 50psi and demand is p...

Page 19: ...observed replace sensor If measured resistance is within allowable range replace PCM Code 54 02 ODT Shorted The discharge thermistor is used to protect the compressor and ensure discharge superheat i...

Page 20: ...will operate to a known position as the valve does not have the capability to feedback actual position The PCM software must know the starting point and then count when stepper motor is pulsed At the...

Page 21: ...ill be reduced to 0 If measurement is open replace reactor Otherwise replace VFD Code 81 14 VFD System Fault Unbalanced PFCM Code 81 54 VFD System Lockout Unbalance PFCM Applicable to 4 and 5 ton mode...

Page 22: ...resistance against table Listen to compressor during operating for abnormal noise indicating physical damage VFD may have internal damage causing high current or compressor may be damaged Code 83 57 V...

Page 23: ...with disconnect if malfunction persists replace VFD Code 88 32 VFD Internal Fault IPM Temp Sens The VFD has internal temperature sensors to monitor critical power components and take action if operati...

Page 24: ...ue to operate normally since the only way to correct this fault is to replace VFD Code 88 38 VFD Internal Fault DC Discharge Code 88 78 VFD Lockout Int DC Discharge The unit VFD converts boosts 230VAC...

Page 25: ...55 Compressor Low Discharge Limit 34 11 58 Compressor High Temperature Limit 35 11 58 Compressor High Compression Limit 36 15 55 Compressor Low Compression Limit 38 13 53 Compressor Starting Error 54...

Page 26: ...t Limit 1 Speed Reduction 12 Compressor Current Limit 2 Speed Reduction 15 55 Compressor Current Limit 3 Shutdown 16 56 Compressor Current Limit 4 Shutdown 57 Compressor Underspeed Shutdown 84 11 58 V...

Page 27: ...nd designs without notice and without obligations 27 A200187 Fig 18 2T 3T Control Box A200188 Fig 19 4T 5T Control Box Note 4T VFD similar not exact 5T reactors have additional chokes to meet FCC requ...

Page 28: ...otice and without obligations 28 A200191 Fig 22 2 3T VFD Connections VFD control relay and LED Fan motor connections VFD to PCM comm connection DC DC terminals Fan motor fuse Compressor UVW connection...

Page 29: ...192 Fig 23 4 5T VFD Connections Note 4T uses separate terminals VFD to PCM comm connection Fan motor connections Compressor UVW connections DC DC terminals Reactor connection Filter board input VFD co...

Page 30: ...186CNV 284ANV Service Manual Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 30 A200193 Fig 24 PCM used on all models...

Page 31: ...designs without notice and without obligations 31 A200194 Fig 25 Bluetooth Module used on all models A200195 Fig 26 Fan Motor used on all models A200196 Fig 27 2 3 4T Rector Note 4Tuses 2 reactors A2...

Page 32: ...rer reserves the right to change at any time specifications and designs without notice and without obligations 32 A200199 Fig 30 PCM to Bluetooth Module Comm Cable used on all models A200200 Fig 31 VF...

Page 33: ...186CNV 284ANV Service Manual Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 33 A200201 Fig 32 PCM Wiring Diagram...

Page 34: ...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 used carefully Avoid...

Page 35: ...flow of refrigerant in system This reversing valve device is easy to troubleshoot and replace The reversing valve solenoid can be checked with power off with an ohmmeter Check for continuity and shor...

Page 36: ...where acid might occur such as burnout Heat pump units must have the drier installed between the compressor and accumulator only Remove after 10 hours of operation Never leave suction line filter drie...

Page 37: ...l eventually fail from lack of lubrication If bleed hole is plugged accumulator must be changed The accumulator has a fusible element located in the bottom end bell See Fig 37 This fusible element wil...

Page 38: ...igerant is leaking at that point A simple and inexpensive method of testing for leaks is to use soap bubbles See Fig 40 Any solution of water and soap may be used Soap solution is applied to all joint...

Page 39: ...ngthen careers and businesses We believe in providing high quality learning experiences both online and in the classroom Access My Learning Center with your HVACpartners credentials at www mlctraining...

Page 40: ...Company Edition Date 06 20 Catalog No SM186CNV 284ANV 01 Replaces NEW 186CNV 284ANV Service Manual Manufacturer reserves the right to change at any time specifications and designs without notice and...

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