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Product Marketing Sales Training

Product Marketing Sales Training. Course Contents. Fundamentals of Inverter Air-Conditioner System OYL Inverter Product Range Service / Troubleshooting. Fundamentals of Inverter A/C System. Power supply (input) frequency is either 50 Hz or 60 Hz.

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Product Marketing Sales Training

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  1. Product Marketing Sales Training

  2. Course Contents • Fundamentals of Inverter Air-Conditioner System • OYL Inverter Product Range • Service / Troubleshooting

  3. Fundamentals of Inverter A/C System • Power supply (input) frequency is either 50 Hz or 60 Hz. • Inverters change the frequency (15 – 100 Hz) to the compressor according to load requirements. Inverter Compressor operates at different speeds.

  4. Fundamentals of Inverter AC = +/- voltage changes DC = no voltage changes U (V) U (V) t(s) t(s) Vavg = 0 Vavg 0

  5. Fundamentals of Inverter f = 70 Hz U (V) U (V) t(s) t(s) f = 50 Hz Compressor Speed can be varied by changing the Compressor Input Frequency

  6. Fundamentals of Inverter IN: 240 VAC f = 50 Hz Rectifier (AC-DC) Inverter (DC-AC) Power supply 220~240/1Ph/50Hz Brushless Motor O/D temp sensor OUT: variable f = variable MCU System control PWM waveform Current sensor

  7. Difference between AC & DC Inverter • Motor efficiency • Motor control method

  8. Motor Efficiency ［％］ ９０ ＤＣ Efficiency ８０ ＡＣ Efficiency Efficiency ７０ AC total loss ６０ ５０ DC total loss Running loss Exciting loss ０．５ １．０ ［ｋＷ］ Motor Output

  9. Motor control method TORQUE VDC Ascent Comp. Load VAC Ascent N1 N2 N3 REVOLUTION DC motor revolution Depend on（Vdc） AC motor revolution Depend on freq. (FV curve) DC motor control method 　　・PAM：Vdc change 　　・PWM：Vdc fix but duty change （AVG VDC change）　　　　　　　　　　　　

  10. Advantages of Inverter System • Room Temperature comfort • Fast cooling / heating • Less compressor ON / OFF cycle • Low starting current (Soft start) • Improvement in Low Temperature characteristic during Heating mode. • Low energy consumption

  11. Room Temperature Comfort Precise Room Temperature control Less temperature fluctuation  0.5 deg Celsius from Set Temperature

  12. Fast Cooling / Heating Quick ramp-up of compressor speed. Enables A/C to reach set temperature faster.

  13. Less ON / OFF cycle Compressor capacity Conventional compressor Full capacity ONOFF ON OFF ON OFF • Once Set Temperature is reached, Inverter compressor still runs BUT at lower frequency. • Conventional compressor will STOP. • Therefore, ON/OFF strain for inverter compressor is less, making it lasts longer. Time

  14. Low Starting Current Running current • Conventional air conditioner: • High starting current • Frequent on/off cycle • Inverter air conditioner: • Low starting current • Smooth operation Hours of operation • Inverter compressor start-up at lower frequency, then quickly ramps up. • Starting current is lower.

  15. Improvement in Low Temperature Characteristics • i) During low ambient temperature the inverter unit will run at max frequency which the capacity will improve compare with normal fix compressor unit • ii) During defrost, the inverter unit will run at max frequency thus the defrost time will be less.

  16. Low Energy Consumption Most Frequently Used Area Inverter

  17. OYL Inverter Product Range • Available for R22 (AC) and R410A (DC) • Single – split & Multi-Split • Wall-mounted, Ceiling Cassette, Ceiling Convertible, Ceiling Concealed.

  18. OYL Inverter Product Range Indoor Wall – Mounted (5)WMX10/15/20/25G(R)

  19. OYL Inverter Product Range Indoor Ceiling Cassette (5)CKX10/15/20C(R) (5)CKX20/25A(R)

  20. OYL Inverter Product Range Indoor Ceiling Convertible (5)CMX15/20/25E(R)

  21. OYL Inverter Product Range Indoor Ceiling Concealed (5)CCX10/15/20/25C(R)

  22. Inverter Product Range • Outdoor Condensing C – Series (Single-split) 5SLX10/15/20/25C(R)

  23. Inverter Product Range • Outdoor Condensing A – Series R410A (Multi-split DC Inverter) 5MSX20/25/30A(R)

  24. Inverter Product Range • Outdoor Condensing A – Series R22 (Multi-split AC Inverter) MSV25/35A

  25. Inverter Product Range Specifications (Single – Split) R410A DC Inverter

  26. Inverter Product Range Specifications (Single – Split) R410A DC Inverter

  27. Inverter Product Range Specifications (Multi – Split) R410A DC Inverter

  28. Inverter Product Range Specifications (Multi – Split) R22 AC Inverter

  29. Inverter Product Range

  30. Installation • Wiring Installation i) Additional signal wire (Low voltage LIVE) ii) Power supply : 3 wires iii) Indoor to outdoor : 4 wires (including E) vi) Earth wires must be connected for indoor and outdoor unit.

  31. Installation Wiring connection INDOOR 1 2 3 N L L 1 N 2 Signal 3 Earth OUTDOOR 1 – Comp 2 – Neutral 3 – Signal MCB / ELCB Power Supply

  32. Protection Algorithms A) Current Control Total Current Compressor stops I1 Frequency 1 step down I2 Maintain Frequency I3 Frequency 1 step up

  33. Protection Algorithms Compressor stops 115°C Frequency 1 step down 108°C Maintain Frequency 95°C Frequency 1 step up b) Compressor discharge temperature Compressor Discharge Temperature

  34. Protection Algorithms When target frequency > Freq C • Freq 6 for one min and at Freq C for 1 min Freq C Freq 6 0 1 min 4 min When target frequency > Freq 6, • Freq 6 for one min. c) Starting control

  35. Protection Algorithms c) Starting control

  36. Protection Algorithms c) Starting control

  37. Trouble-shooting AIR – CONDITIONAL PROBLEMS Insufficient Cooling/Heating Starting or running failure Refrigerant circuit problem Electrical circuit problem

  38. Trouble-shooting • Diagnoses by use of pressure gauge Pressure measurement Refrigerant charging • To troubleshoot the refrigerant circuit pressure gauge is one of the important tooling • Both of the LP and HP must closed for pressure measurement Vacuuming

  39. Insufficient cooling Insufficient Cooling Insufficient Cooling Unit Starts Unit Starts High cooling load High cooling load Check air circulation Check air circulation Refrigerant circuit Refrigerant circuit Indoor/Outdoor coil dirty (clogged) Indoor/Outdoor coil dirty (clogged) Excessive heat source e.g. electric kettle Excessive heat source e.g. electric kettle Leakage Leakage Air filters dirty Air filters dirty Room overcrowded with people Room overcrowded with people Restriction e.g.. at strainer, capillary, filter dryer, etc Restriction e.g at strainer, capillary, filter dryer, etc Fan malfunction Fan malfunction Windows/ doors wide open Windows/ doors wide open Obstruction at air inlet/outlet of indoor/outdoor unit Obstruction at air inlet/outlet of indoor/outdoor unit Compressor Compressor Less or no compression (Low running current) Less or no compression (Low running current) Satisfactory operation with temperature difference of air intake & discharge of indoor unit 10ºC - 15ºC Satisfactory operation with temperature difference of air intake & discharge of indoor unit 10ºC - 15ºC

  40. Insufficient Heating Insufficient Cooling Insufficient Heating Unit Starts Unit Starts High Heating load High cooling load Check air circulation Check air circulation Refrigerant circuit Refrigerant circuit Indoor/Outdoor coil dirty (clogged) Indoor/Outdoor coil dirty (clogged) Leakage Leakage Air filters dirty Air filters dirty Restriction e.g at strainer, capillary, filter dryer, etc Restriction e.g.. at strainer, capillary, filter dryer, etc Fan malfunction Fan malfunction Windows/ doors wide open Windows/ doors wide open Obstruction at air inlet/outlet of indoor/outdoor unit Obstruction at air inlet/outlet of indoor/outdoor unit Compressor Compressor Less or no compression (Low running current) Less or no compression (Low running current) Satisfactory operation with temperature difference of air intake & discharge of indoor unit 10ºC - 15ºC Satisfactory operation with temperature difference of air intake & discharge of indoor unit 16ºC - 25ºC

  41. Pressure conditions

  42. Pressure table definition Note: Outdoor air 35ºC DB Indoor air 27ºC DB/ 19.5ºC WB

  43. Excessive refrigerant Causes For systems with EXV • Improper expansion valve adjustment. • Poor installation of feeler bulb. • Overcharged refrigerant. For systems with capillary tube • Overcharged refrigerant

  44. Insufficient refrigerant 2 types • amount of refrigerant in the system is not enough. • amount of refrigerant passing through expansion device is not enough Possible causes • undercharge refrigerant • refrigerant leak • choked filter, drier • faulty expansion device

  45. Excessive condensing pressure Possible causes • air flow short circuit • insufficient air flow • partially blocked condenser • presence of air or non-condensable gases in the system. • operation beyond upper ambient temperature limits

  46. Electrical circuit trouble-shooting Electrical circuit problem • Key components functioning checking • Controller for different models • Troubleshooting steps for the inverter controller

  47. Required Tools Clamp meter DC CURRENT AC CURRENT FREQ RESISTANCE VDC VAC LIGHT

  48. Required Tools Multi-meter RESISTANT VDC CONTINUITY DC CURRENT VAC AC CURRENT

  49. Key Components - Capacitor Terminal • Functions To smoothen the DC bus for the inverter board • Testing Use multi-meter to check the conductivity of the terminal • Problems • Caused by over voltage • Electrolyte dried up causing it malfunction • High ambient working condition

  50. Key Components – Bridge Diode + ~ ~ - • Function To rectifier the AC source to DC source • Testing Use multi-meter to check the conductivity of the terminal. Normally, 0.4V – 0.6V or 240-250KΩ • Problems • Caused by over voltage • Working ambient to high

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