User Manual InvertFlex 1K/2K/3K/5K for more information please visit www.flexston.com Table of Contents ABOUT THIS MANUAL ..................................................................................................................... 1 Purpose ................................................................................................................................................1 Scope ...................................................................................................................................................1 SAFETY INSTRUCTIONS .................................................................................................................. 1 INTRODUCTION .............................................................................................................................. 2 Features ...............................................................................................................................................2 Basic System Architecture ......................................................................................................................2 Product Overview ..................................................................................................................................3 INSTALLATION ................................................................................................................................ 4 Unpacking and Inspection ......................................................................................................................4 Preparation ...........................................................................................................................................4 Mounting the Unit ..................................................................................................................................4 Battery Connection ................................................................................................................................5 AC Input/Output Connection ..................................................................................................................7 PV Connection... ....................................................................................................................................9 Final Assembly .................................................................................................................................... 10 Communication Connection .................................................................................................................. 11 Dry Contact Signal ............................................................................................................................... 11 OPERATION ................................................................................................................................... 12 Power ON/OFF .................................................................................................................................... 12 Operation and Display Panel ................................................................................................................. 12 LCD Display Icons ................................................................................................................................ 13 LCD Setting ......................................................................................................................................... 15 Display Setting .................................................................................................................................... 23 Operating Mode Description ................................................................................................................. 25 Fault Reference Code ........................................................................................................................... 27 Warning Indicator ................................................................................................................................ 27 SPECIFICATIONS .......................................................................................................................... 28 Table 1 Line Mode Specifications .......................................................................................................... 28 Table 2 Inverter Mode Specifications..................................................................................................... 29 Table 3 Charge Mode Specifications ...................................................................................................... 30 Table 4 General Specifications .............................................................................................................. 30 TROUBLE SHOOTING .................................................................................................................... 31 Appendix: Approximate Back-up Time Table ................................................................................ 32 for more information please visit www.flexston.com ABOUT THIS MANUAL Purpose This manual describes the assembly, installation, operation and troubleshooting of this unit. Please read this manual carefully before installations and operations. Keep this manual for future reference. Scope This manual provides safety and installation guidelines as well as information on tools and wiring. SAFETY INSTRUCTIONS WARNING: This chapter contains important safety and operating instructions. Read and keep this manual for future reference. 1. Before using the unit, read all instructions and cautionary markings on the unit, the batteries and all appropriate sections of this manual. 2. CAUTION - To reduce risk of injury, charge only deep-cycle lead acid type rechargeable batteries. Other types of batteries may burst, causing personal injury and damage. 3. Do not disassemble the unit. Take it to a qualified service center when service or repair is required. Incorrect re-assembly may result in a risk of electric shock or fire. 4. To reduce risk of electric shock, disconnect all wirings before attempting any maintenance or cleaning. Turning off the unit will not reduce this risk. 5. CAUTION – Only qualified personnel can install this device with battery. 6. NEVER charge a frozen battery. 7. For optimum operation of this inverter/charger, please follow required spec to select appropriate cable size. It’s very important to correctly operate this inverter/charger. 8. Be very cautious when working with metal tools on or around batteries. A potential risk exists to drop a tool to spark or short circuit batteries or other electrical parts and could cause an explosion. 9. Please strictly follow installation procedure when you want to disconnect AC or DC terminals. Please refer to INSTALLATION section of this manual for the details. 10. Fuses (4 pieces of 40A, 32VDC for 1KVA/2KVA, 6 pieces of 40A, 32VDC for 3KVA, 1 piece of 200A, 64VDC for 5KVA) are provided as over-current protection for the battery supply. 11. GROUNDING INSTRUCTIONS -This inverter/charger should be connected to a permanent grounded wiring system. Be sure to comply with local requirements and regulation to install this inverter. 12. NEVER cause AC output and DC input short circuited. Do NOT connect to the mains when DC input short circuits. 13. Warning!! Only qualified service persons are able to service this device. If errors still persist after following troubleshooting table, please send this inverter/charger back to local dealer or service center for maintenance. 1 for more information please visit www.flexston.com INTRODUCTION This is a multi-function inverter/charger, combining functions of inverter, solar charger and battery charger to offer uninterruptible power support with portable size. Its comprehensive LCD display offers user-configurable and easy-accessible button operation such as battery charging current, AC/solar charger priority, and acceptable input voltage based on different applications. Features Pure sine wave inverter Configurable input voltage range for home appliances and personal computers via LCD setting Configurable battery charging current based on applications via LCD setting Configurable AC/Solar Charger priority via LCD setting Compatible to mains voltage or generator power Auto restart while AC is recovering Overload/ Over temperature/ short circuit protection Smart battery charger design for optimized battery performance Cold start function Basic System Architecture The following illustration shows basic application for this inverter/charger. It also includes following devices to have a complete running system: Generator or Utility. PV modules (option) Consult with your system integrator for other possible system architectures depending on your requirements. This inverter can power all kind of appliances at home or office environment, including motor-type appliances such as tube light, fan, refrigerator and air conditioner. Figure 1 Hybrid Power System 2 for more information please visit www.flexston.com Product Overview InvertFlex 5K single mode InvertFlex 1K InvertFlex 5K parallel model 1. LCD display 2. Status indicator 3. Charging indicator 4. Fault indicator InvertFlex 2K/3K NOTE: For parallel model installation and operation, please check separate parallel installation guide for the details. 5. Function buttons 6. Power on/off switch 7. AC input 8. AC output 9. PV input 10. Battery input 11. Circuit breaker 12. RS232 communication port 13. Parallel communication cable (only for InvertFlex 5K) 14. Current sharing cable (only for InvertFlex 5K) 15. Dry contact 3 for more information please visit www.flexston.com INSTALLATION Unpacking and Inspection Before installation, please inspect the unit. Be sure that nothing inside the package is damaged. You should have received the following items inside of package: The unit x 1 User manual x 1 Communication cable x 1 Software CD x 1 Preparation Before connecting all wirings, please take off bottom cover by removing two screws as shown below. Mounting the Unit Consider the following points before selecting where to install: Do not mount the inverter on flammable construction materials. Mount on a solid surface Install this inverter at eye level in order to allow the LCD display to be read at all times. For proper air circulation to dissipate heat, allow a clearance of approx. 20 cm to the side and approx. 50 cm above and below the unit. The ambient temperature should be between 0°C and 55°C to ensure optimal operation. The recommended installation position is to be adhered to the wall vertically. Be sure to keep other objects and surfaces as shown in the diagram to guarantee sufficient heat dissipation and to have enough space for removing wires. SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY. 4 for more information please visit www.flexston.com Install the unit by screwing three screws. Battery Connection CAUTION: For safety operation and regulation compliance, it’s requested to install a separate DC over-current protector or disconnect device between battery and inverter. It may not be requested to have a disconnect device in some applications, however, it’s still requested to have over-current protection installed. Please refer to typical amperage in below table as required fuse or breaker size. Ring terminal: WARNING! All wiring must be performed by a qualified personnel. WARNING! It's very important for system safety and efficient operation to use appropriate cable for battery connection. To reduce risk of injury, please use the proper recommended cable and terminal size as below. Recommended battery cable and terminal size: Model InvertFlex 1K/2K InvertFlex 3K InvertFlex 5K Typical Amperage 66A 100A 84A Battery capacity Wire Size Cable mm2 Ring Terminal Dimensions D (mm) L (mm) 1*6AWG 14 6.4 29.2 2*10AWG 8 6.4 23.8 100AH 1*4AWG 22 6.4 33.2 200AH 2*8AWG 14 6.4 29.2 1*4AWG 22 6.4 33.2 2*8AWG 14 6.4 29.2 2*8AWG 14 6.4 29.2 100AH 200AH Torque value 2~ 3 Nm 2~ 3 Nm 2~ 3 Nm Please follow below steps to implement battery connection: 1. Assemble battery ring terminal based on recommended battery cable and terminal size. 2. InvertFlex 1K model supports 12VDC system, InvertFlex 2K/3Kmodel supports 24VDC system and InvertFlex 5K model supports 48VDC system. Connect all battery packs as below chart. It’s suggested to connect at least 100Ah capacity battery for 1-3KVA model and at least 200Ah capacity battery for InvertFlex 5K model. 5 for more information please visit www.flexston.com NOTE: Please only use sealed lead acid battery or sealed GEL/AGM lead-acid battery. 3. Insert the ring terminal of battery cable flatly into battery connector of inverter and make sure the bolts are tightened with torque of 2-3 Nm. Make sure polarity at both the battery and the inverter/charge is correctly connected and ring terminals are tightly screwed to the battery terminals. WARNING: Shock Hazard Installation must be performed with care due to high battery voltage in series. CAUTION!! Do not place anything between the flat part of the inverter terminal and the ring terminal. Otherwise, overheating may occur. CAUTION!! Do not apply anti-oxidant substance on the terminals before terminals are connected tightly. CAUTION!! Before making the final DC connection or closing DC breaker/disconnector, be sure positive (+) must be connected to positive (+) and negative (-) must be connected to negative (-). 6 for more information please visit www.flexston.com AC Input/Output Connection CAUTION!! Before connecting to AC input power source, please install a separate AC breaker between inverter and AC input power source. This will ensure the inverter can be securely disconnected during maintenance and fully protected from over current of AC input. The recommended spec of AC breaker is 10A for InvertFlex 1K, 20A for InvertFlex 2K, 32A for InvertFlex 3K , 50A for InvertFlex 5K. CAUTION!! There are two terminal blocks with “IN” and “OUT” markings. Please do NOT mis-connect input and output connectors. WARNING! All wiring must be performed by a qualified personnel. WARNING! It's very important for system safety and efficient operation to use appropriate cable for AC input connection. To reduce risk of injury, please use the proper recommended cable size as below. Suggested cable requirement for AC wires Model Gauge Torque Value InvertFlex 1K 16 AWG 0.5~ 0.6 Nm InvertFlex 2K 14 AWG 0.8~ 1.0 Nm InvertFlex 3K 12 AWG 1.2~ 1.6 Nm InvertFlex 5K 8 AWG 1.4~1.6Nm Please follow below steps to implement AC input/output connection: 1. Before making AC input/output connection, be sure to open DC protector or disconnector first. 2. Remove insulation sleeve 10mm for six conductors. And shorten phase L and neutral conductor N 3 mm. 3. Insert AC input wires according to polarities indicated on terminal block and tighten the terminal screws. Be sure to connect PE protective conductor ( ) first. →Ground (yellow-green) L→LINE (brown or black) N→Neutral (blue) InvertFlex 1K InvertFlex 2K/3K/5K WARNING: Be sure that AC power source is disconnected before attempting to hardwire it to the unit. 7 for more information please visit www.flexston.com 4. Then, insert AC output wires according to polarities indicated on terminal block and tighten terminal screws. Be sure to connect PE protective conductor ( ) first. →Ground (yellow-green) L→LINE (brown or black) N→Neutral (blue) InvertFlex 1K InvertFlex 2K/3K/5K 5. Make sure the wires are securely connected. CAUTION: Important Be sure to connect AC wires with correct polarity. If L and N wires are connected reversely, it may cause utility short-circuited when these inverters are worked in parallel operation. CAUTION: Appliances such as air conditioner are required at least 2~3 minutes to restart because it’s required to have enough time to balance refrigerant gas inside of circuits. If a power shortage occurs and recovers in a short time, it will cause damage to your connected appliances. To prevent this kind of damage, please check manufacturer of air conditioner if it’s equipped with time-delay function before installation. Otherwise, this inverter/charger will trig overload fault and cut off output to protect your appliance but sometimes it still causes internal damage to the air conditioner. 8 for more information please visit www.flexston.com PV Connection CAUTION: Before connecting to PV modules, please install separately a DC circuit breaker between inverter and PV modules. WARNING! All wiring must be performed by a qualified personnel. WARNING! It's very important for system safety and efficient operation to use appropriate cable for PV module connection. To reduce risk of injury, please use the proper recommended cable size as below. Typical Amperage Gauge Torque Value 50A 8 AWG 1.4~1.6 Nm PV Module Selection: When selecting proper PV modules, please be sure to consider below requirements first: 1. Open circuit Voltage (Voc) of PV modules not exceeds max. PV array open circuit voltage of inverter. INVERTER MODEL InvertFlex InvertFlex 1K InvertFlex 2K InvertFlex 3K 5K Solar Charger Charging Current (PWM) System DC Voltage Operating Voltage Range Max. PV Array Open Circuit Voltage 50Amp 12Vdc 24Vdc 48Vdc 15~18Vdc 30~32Vdc 60~72vdc 40Vdc 60Vdc 105Vdc 2. Max. Power Voltage (Vmpp) of PV modules should be close to best Vmp of inverter or within Vmp range to get best performance. If one PV module can not meet this requirement, it’s necessary to have several PV modules in series connection. Refer to below table. Model Best Vmp Vmp range InvertFlex 1K 15Vdc 15V~18V InvertFlex 2K/3K 30Vdc 30V~32V InvertFlex 5K 60Vdc 56V~72V Note: * Vmp: panel max power point voltage. The PV charging efficiency is maximized while PV system voltage is close to Best Vmp. Maximum PV module numbers in Series: Vmpp of PV module * X pcs ≒ Best Vmp of Inverter or Vmp range PV module numbers in Parallel: Max. charging current of inverter / Impp Total PV module numbers = maximum PV module numbers in series * PV module numbers in parallel Take 1KVA inverter as an example to select proper PV modules. After considering Voc of PV module not exceeds 40Vdc and max. Vmpp of PV module close to 15Vdc or within 13Vdc ~ 18Vdc, we can choose PV module with below specification. Maximum Power (Pmax) 85W Max. PV module numbers in series 1 17.6 x 1 ≒ 15 ~ 18 Max. Power Voltage Vmpp(V) 17.6V Max. Power Current Impp(A) 4.83A PV module numbers in parallel 10 50 A / 4.83 Open Circuit Voltage Voc(V) 21.6V Total PV module numbers Short Circuit Current Isc(A) 5.03A 1 x 10 = 10 Maximum PV module numbers in Series: 1 PV module numbers in Parallel: 10 Total PV module numbers: 1 x 10 = 10 Take InvertFlex 2K/InvertFlex 3K inverter as an example to select proper PV module. After considering Voc of PV module not exceed 60Vdc and max. Vmpp of PV module close to 30Vdc or within 30Vdc ~ 32Vdc, we can choose PV module with below specification. 9 for more information please visit www.flexston.com Maximum Power (Pmax) Max. Power Voltage Vmpp(V) Max. Power Current Impp(A) Open Circuit Voltage Voc(V) Short Circuit Current Isc(A) 260W 30.9V 8.42A 37.7V 8.89A Max. PV module numbers in series 1 30.9 x 1 ≒ 30 ~ 32 PV module numbers in parallel 6 50 A / 8.42 Total PV module numbers 1x6=6 Maximum PV module numbers in Series: 1 PV module numbers in Parallel: 6 Total PV module numbers: 1 x 6 = 6 Take InvertFlex 5K model inverter as an example to select proper PV module. After considering Voc of PV module not exceed 105Vdc and max. Vmpp of PV module close to 60Vdc or within 56Vdc ~ 72Vdc, we can choose PV module with below specification. Maximum Power (Pmax) 260W Max. PV module numbers in series 2 30.9 x 2 ≒ 56 ~ 72 Max. Power Voltage Vmpp(V) 30.9V Max. Power Current Impp(A) 8.42A PV module numbers in parallel 6 50 A / 8.42 Open Circuit Voltage Voc(V) 37.7V Total PV module numbers Short Circuit Current Isc(A) 8.89A 2 x 6 = 12 Maximum PV module numbers in Series: 2 PV module numbers in Parallel: 6 Total PV module numbers: 2 x 6 = 12 Please follow below steps to implement PV module connection: 1. Remove insulation sleeve 10 mm for positive and negative conductors. 2. Check correct polarity of connection cable from PV modules and PV input connectors. Then, connect positive pole (+) of connection cable to positive pole (+) of PV input connector. Connect negative pole (-) of connection cable to negative pole (-) of PV input connector. 3. Make sure the wires are securely connected. Final Assembly After connecting all wirings, please put bottom cover back by screwing two screws as shown below. InvertFlex 1K/2K/3K InvertFlex 5K 10 for more information please visit www.flexston.com Communication Connection Please use supplied communication cable to connect to inverter and PC. Insert bundled CD into a computer and follow on-screen instruction to install the monitoring software. For the detailed software operation, please check user manual of software inside of CD. Dry Contact Signal There is one dry contact (3A/250VAC) available on the rear panel. It could be used to deliver signal to external device when battery voltage reaches warning level. Unit Status Power Off Condition Dry contact port: NC & C NO & C Unit is off and no output is powered. Close Open Output is powered from Utility. Close Open Open Close Close Open Open Close Close Open Output is powered Program 01 set as Utility Battery voltage < Low DC warning voltage from Battery Battery voltage > Setting or Solar. value in Program 13 or battery Power On charging reaches floating stage Program 01 is Battery voltage < Setting set as SBU or value in Program 12 Solar first Battery voltage > Setting value in Program 13 or battery charging reaches floating stage 11 for more information please visit www.flexston.com OPERATION Power ON/OFF Once the unit has been properly installed and the batteries are connected well, simply press On/Off switch (located on the button of the case) to turn on the unit. Operation and Display Panel The operation and display panel, shown in below chart, is on the front panel of the inverter. It includes three indicators, four function keys and a LCD display, indicating the operating status and input/output power information. LCD display LED indicators Function keys LED Indicator LED Indicator Green Green Red Messages Solid On Output is powered by utility in Line mode. Flashing Output is powered by battery or PV in battery mode. Solid On Battery is fully charged. Flashing Battery is charging. Solid On Fault occurs in the inverter. Flashing Warning condition occurs in the inverter. Function Keys Function Key Description ESC To exit setting mode UP To go to previous selection DOWN To go to next selection ENTER To confirm the selection in setting mode or enter setting mode 12 for more information please visit www.flexston.com LCD Display Icons Icon Function description Input Source Information Indicates the AC input. Indicates the PV input Indicate input voltage, input frequency, PV voltage, battery voltage and charger current. Configuration Program and Fault Information Indicates the setting programs. Indicates the warning and fault codes. Warning: Fault: flashing with warning code. lighting with fault code Output Information Indicate output voltage, output frequency, load percent, load in VA, load in Watt and discharging current. Battery Information Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% in battery mode and charging status in line mode. In AC mode, it will present battery charging status. Status Battery voltage <2V/cell Constant 2 ~ 2.083V/cell Current mode / Constant Voltage mode LCD Display 4 bars will flash in turns. Bottom bar will be on and the other three bars will flash in turns. Bottom two bars will be on and the other two bars will flash in turns. Bottom three bars will be on and the top 2.083 ~ 2.167V/cell > 2.167 V/cell bar will flash. Floating mode. Batteries are fully charged. 4 bars will be on. 13 for more information please visit www.flexston.com In battery mode, it will present battery capacity. Load Percentage Battery Voltage LCD Display < 1.717V/cell 1.717V/cell ~ 1.8V/cell Load >50% 1.8 ~ 1.883V/cell > 1.883 V/cell < 1.817V/cell 1.817V/cell ~ 1.9V/cell 50%> Load > 20% 1.9 ~ 1.983V/cell > 1.983 < 1.867V/cell 1.867V/cell ~ 1.95V/cell Load < 20% 1.95 ~ 2.033V/cell > 2.033 Load Information Indicates overload. Indicates the load level by 0-24%, 25-50%, 50-74% and 75-100%. 0%~25% 25%~50% 50%~75% 75%~100% Mode Operation Information Indicates unit connects to the mains. Indicates unit connects to the PV panel. Indicates load is supplied by utility power. Indicates the utility charger circuit is working. Indicates the DC/AC inverter circuit is working. Mute Operation Indicates unit alarm is disabled. 14 for more information please visit www.flexston.com LCD Setting After pressing and holding ENTER button for 3 seconds, the unit will enter setting mode. Press “UP” or “DOWN” button to select setting programs. And then, press “ENTER” button to confirm the selection or ESC button to exit. Setting Programs: Program Description Selectable option Escape 00 Exit setting mode Solar energy provides power to the loads as first priority. If solar energy is not sufficient to power all connected loads, battery Solar first energy will supply power the loads at the same time. Utility provides power to the loads only when any one condition happens: - Solar energy is not available - Battery voltage drops to low-level warning voltage or the setting point in program 12. Output source priority: 01 To configure load power Utility will provide power to the loads Utility first (default) source priority as first priority. Solar and battery energy will provide power to the loads only when utility power is not available. Solar energy provides power to the loads as first priority. If solar energy is not sufficient to SBU priority power all connected loads, battery energy will supply power to the loads at the same time. Utility provides power to the loads only when battery voltage drops to either low-level warning voltage or the setting point in program 12. Available options only for InvertFlex 1K/2K/3K model 02 Maximum charging current: To configure total charging current for solar and utility chargers. (Max. charging current = utility charging current + solar charging current) 10A (Only available for 1K model) 30A 20A 40A 15 for more information please visit www.flexston.com 50A (default) Available options only for InvertFlex 5K model 60A 70A 80A 90A 100A 110A Appliances (default) If selected, acceptable AC input voltage range will be within 03 AC input voltage range 90-280VAC. UPS If selected, acceptable AC input voltage range will be within 170-280VAC. 04 Power saving mode enable/disable Saving mode disable If disabled, no matter connected load (default) is low or high, the on/off status of inverter output will not be effected. Saving mode enable If enabled, the output of inverter will be off when connected load is pretty low or not detected. 05 Battery type AGM (default) Flooded User-Defined If “User-Defined” is selected, battery charge voltage and low DC cut-off voltage can be set up in program 26, 27 and 29. Restart disable 06 Auto restart when overload occurs (default) Restart disable 07 Auto restart when over temperature occurs Restart enable (default) 50Hz (default) 09 Restart enable 60Hz Output frequency 16 for more information please visit www.flexston.com Available options in InvertFlex 1K model: 10A 20A (default) Available options in InvertFlex 2K/3K model: 20A Maximum utility charging current 11 Note: If setting value in program 02 is smaller than that in program in 11, the inverter will apply charging current from program 02 for utility charger. 30A (default) Available options in 5K model: 2A 10A 20A 30A (default) 40A 50A 60A Available options in InvertFlex 1K model: 12 Setting voltage point back to utility source when selecting “SBU priority” or “Solar first” in program 01. 11.0V 11.3V 11.5V (default) 11.8V 12.0V 12.3V 12.5V 12.8V Available options in InvertFlex 2K/3K model: 22.0V 22.5V 23.0V (default) 23.5V 17 for more information please visit www.flexston.com 24.0V 24.5V 25.0V 25.5V Available options in InvertFlex 5K model: 44V 45V 46V (default) 47V 48V 49V 50V 51V Available options in InvertFlex 1K model: Setting voltage point back 13 to battery mode when Battery fully charged 12.0V 12.3V 12.5V 12.8V 13.0V 13.3V 13.5V (default) 13.8V 14.0V selecting “SBU priority” or “Solar first” in program 01. 18 for more information please visit www.flexston.com 14.3V 14.5V Available options in InvertFlex 2K/3K model: Setting voltage point back 13 Battery fully charged 24V 24.5V 25V 25.5V 26V 26.5V 27V (default) 27.5V 28V 28.5V 29V to battery mode when selecting “SBU priority” or “Solar first” in program 01. Available options in InvertFlex 5K model: Battery fully charged 48V 49V 50V 51V 52V 53V 54V (default) 19 for more information please visit www.flexston.com 55V 56V 57V 58V If this inverter/charger is working in Line, Standby or Fault mode, charger source can be programmed as below: Solar first Solar energy will charge battery as first priority. Utility will charge battery only when solar energy is not available. Utility first Utility will charge battery as first priority. Solar energy will charge battery 16 Charger source priority: only when utility power is not To configure charger source available. priority Solar and Utility Solar energy and utility will charge (default) battery at the same time. Only Solar Solar energy will be the only charger source no matter utility is available or not. If this inverter/charger is working in Battery mode or Power saving mode, only solar energy can charge battery. Solar energy will charge battery if it's available and sufficient. 18 19 Alarm on (default) Alarm off Return to default If selected, no matter how users display screen switch display screen, it will (default) automatically return to default Alarm control display screen (Input voltage Auto return to default display screen /output voltage) after no button is pressed for 1 minute. Stay at latest screen If selected, the display screen will stay at latest screen user finally switches. Backlight on 20 Backlight control 22 Beeps while primary source is interrupted Backlight off (default) Alarm on (default) Alarm off 20 for more information please visit www.flexston.com 23 Overload bypass: When enabled, the unit will transfer to line mode if overload occurs in battery mode. Bypass disable (default) Record enable 25 Bypass enable Record disable (default) Record Fault code 1KVA default setting: 14.1V 2K/3KVA default setting: 28.2V 26 Bulk charging voltage (C.V voltage) 5KVA default setting: 56.4V If self-defined is selected in program 5, this program can be set up. Setting range is from 12.0V to 14.6V for InvertFlex 1K model, 24.0V to 29.2V for InvertFlex 2K/3K model and 48.0V to 58.4V for InvertFlex 5K model. Increment of each click is 0.1V. 1KVA default setting: 13.5V 2K/3KVA default setting: 27.0V 27 Floating charging voltage 5KVA default setting: 54.0V If self-defined is selected in program 5, this program can be set up. Setting range is from 12.0V to 14.6V for InvertFlex 1K model, 24.0V to 29.2V for InvertFlex 2K/3K model and 48.0V to 58.4V for InvertFlex 5K model. Increment of each click is 0.1V. 21 for more information please visit www.flexston.com 1KVA default setting: 10.5V 2K/3KVA default setting: 21.0V 5KVA default setting: 42.0V 29 Low DC cut-off voltage If self-defined is selected in program 5, this program can be set up. Setting range is from 10.0V to 12.0V for InvertFlex 1K model, 20.0V to 24.0V for InvertFlex 2K/3K model and 40.0V to 48.0V for InvertFlex 5K model. Increment of each click is 0.1V. Low DC cut-off voltage will be fixed to setting value no matter what percentage of load is connected. Solar power balance enable (Default): 31 Solar power balance: When enabled, solar input power will be automatically adjusted according to connected load power. (Only available for InvertFlex 5KVA model) Solar power balance disable: If selected, solar input power will be automatically adjusted according to the following formula: Max. input solar power = Max. battery charging power + Connected load power. If selected, the solar input power will be the same to max. battery charging power no matter how much loads are connected. The max. battery charging power will be based on the setting current in program 02. (Max. solar power = Max. battery charging power) 22 for more information please visit www.flexston.com Display Setting The LCD display information will be switched in turns by pressing “UP” or “DOWN” key. The selectable information is switched as below order: input voltage, input frequency, PV voltage, charging current, battery voltage, output voltage, output frequency, load percentage, load in Watt, load in VA, load in Watt, DC discharging current, main CPU Version and second CPU Version. Selectable information LCD display Input Voltage=230V, output voltage=230V Input voltage/Output voltage (Default Display Screen) Input frequency=50Hz Input frequency PV voltage=60V PV voltage Charging current=50A Charging current Battery voltage=25.5V, discharging current=1A Battery voltage/ DC discharging current Output frequency=50Hz Output frequency 23 for more information please visit www.flexston.com Load percent=70% Load percentage When connected load is lower than InvertFlex 1k, load in VA will present xxxVA like below chart. Load in VA When load is larger than 1kVA (≧1KVA), load in VA will present x.xkVA like below chart. When load is lower than 1kW, load in W will present xxxW like below chart. Load in Watt When load is larger than 1kW (≧1KW), load in W will present x.xkW like below chart. Main CPU version 00014.04 Main CPU version checking 24 for more information please visit www.flexston.com Secondary CPU version 00003.03 Secondary CPU version checking Operating Mode Description Operation mode Description LCD display Charging by utility and PV energy. Standby mode / Power saving mode Charging by utility. Note: *Standby mode: The inverter is not turned on yet but at this No output is supplied by the time, the inverter can charge unit but it still can charge battery without AC output. batteries. Charging by PV energy. *Power saving mode: If enabled, the output of inverter will be off when connected load is pretty low or not detected. No charging. Charging by utility and PV energy. (Only available in InvertFlex 1K/2K/3K model) Fault mode Charging Note: *Fault mode: Errors are caused by inside circuit error or external reasons such as over by utility. (Only available in InvertFlex 1K/2K/3K model) PV energy and utility can charge batteries. temperature, output short circuited and so on. Charging by PV energy. 25 for more information please visit www.flexston.com Operation mode Description Fault mode PV energy and utility can Note: charge batteries. *Fault mode: Errors are caused by inside circuit error or external reasons such as over temperature, output short circuited and so on. LCD display No charging. Utility can power loads when the unit starts up without Power from utility battery. (Only available InvertFlex 5K model with single operation) Charging by utility and PV energy. The unit will provide output Line Mode power from the mains. It will also charge the battery at Charging by utility. line mode. Power from battery and PV energy. The unit will provide output Battery Mode power from battery and PV power. Power from battery only. 26 for more information please visit www.flexston.com Fault Reference Code Fault Code Fault Event 01 Fan is locked when inverter is off. 02 Over temperature 03 Battery voltage is too high 04 Battery voltage is too low 05 06 Icon on Output short circuited or over temperature is detected by internal converter components. Output voltage is abnormal. (For InvertFlex 1K/2K/3K model) Output voltage is too high. InvertFlex(5K model) 07 Overload time out 08 Bus voltage is too high 09 Bus soft start failed 11 Main relay failed 51 Over current or surge 52 Bus voltage is too low 53 Inverter soft start failed 55 Over DC voltage in AC output 56 Battery connection is open 57 Current sensor failed 58 Output voltage is too low NOTE: Fault codes 51, 52, 53, 55, 56, 57 and 58 are only available in 5K model. Warning Indicator Warning Code Warning Event Audible Alarm 01 Fan is locked when inverter is on. Beep three times every second 03 Battery is over-charged Beep once every second 04 Low battery Beep once every second 07 Overload Beep once every 0.5 second 10 Output power derating Beep twice every 3 seconds Icon flashing 27 for more information please visit www.flexston.com SPECIFICATIONS Table 1 Line Mode Specifications INVERTER MODEL InvertFlex InvertFlex InvertFlex 1K 2K Input Voltage Waveform InvertFlex 3K 5K Sinusoidal (utility or generator) Nominal Input Voltage 230Vac 170Vac±7V (UPS); Low Loss Voltage 90Vac±7V (Appliances) 180Vac±7V (UPS); Low Loss Return Voltage 100Vac±7V (Appliances) High Loss Voltage 280Vac±7V High Loss Return Voltage 270Vac±7V Max AC Input Voltage 300Vac Nominal Input Frequency 50Hz / 60Hz (Auto detection) Low Loss Frequency 40±1Hz Low Loss Return Frequency 42±1Hz High Loss Frequency 65±1Hz High Loss Return Frequency 63±1Hz Output Short Circuit Protection Circuit Breaker Efficiency (Line Mode) >95% ( Rated R load, battery full charged ) 10ms typical (UPS); Transfer Time 20ms typical (Appliances) Output Power Output power derating: Rated Power When AC input voltage drops to 170V, the output power will be derated. 50% Power 90V 170V 280V Input Voltage 28 for more information please visit www.flexston.com Table 2 Inverter Mode Specifications INVERTER MODEL Rated Output Power InvertFlex InvertFlex InvertFlex InvertFlex 1K 2K 3K 5K 1KVA/0.8KW 2KVA/1.6KW 3KVA/2.4KW Output Voltage Waveform Pure Sine Wave Output Voltage Regulation 230Vac±5% Output Frequency 50Hz Peak Efficiency 90% Overload Protection 5s@≥150% load; 10s@110%~150% load 2* rated power for 5 seconds Surge Capacity Nominal DC Input Voltage 5KVA/4KW 12Vdc 24Vdc 48Vdc 11.5Vdc 23.0Vdc 46.0Vdc @ load < 20% 11.0Vdc 22.0Vdc 44.0Vdc @ 20% ≤ load < 50% 10.7Vdc 21.4Vdc 42.8Vdc @ load ≥ 50% 10.1Vdc 20.2Vdc 40.4Vdc @ load < 20% 11.5Vdc 23.0Vdc 46.0Vdc @ 20% ≤ load < 50% 11.2Vdc 22.4Vdc 44.8Vdc @ load ≥ 50% 10.6Vdc 21.2Vdc 42.4Vdc @ load < 20% 10.5Vdc 21.0Vdc 42.0Vdc @ 20% ≤ load < 50% 10.2Vdc 20.4Vdc 40.8Vdc @ load ≥ 50% 9.6Vdc 19.2Vdc 38.4Vdc High DC Recovery Voltage 14.5Vdc 29Vdc 58Vdc High DC Cut-off Voltage 15.5Vdc 31Vdc 60Vdc No Load Power Consumption <15W <20W <50W Saving Mode Power Consumption <5W <10W <15W Cold Start Voltage Low DC Warning Voltage Low DC Warning Return Voltage Low DC Cut-off Voltage 29 for more information please visit www.flexston.com Table 3 Charge Mode Specifications INVERTER MODEL InvertFlex InvertFlex InvertFlex InvertFlex 1K 2K 3K 5K Charging Algorithm 3-Step Utility Charging Mode AC Charging Current Bulk Charging Voltage Flooded Battery AGM / Gel Battery Floating Charging Voltage 10/20Amp 20/30Amp (@VI/P=230Vac) 2/10/20/30/40/50/ 60Amp (@VI/P=230Vac) 14.6 29.2 58.4 14.1 28.2 56.4 13.5Vdc 27Vdc 54Vdc Battery Voltage, per cell Charging Current, % 2.43Vdc (2.35Vdc) Voltage 2.25Vdc 100% Charging Curve 50% T0 T1 T1 = 10* T0, minimum 10mins, maximum 8hrs Current Bulk (Constant Current) Absorption (Constant Voltage) Time Maintenance (Floating) Solar Charging Mode Charging Current (PWM) System DC Voltage Operating Voltage Range Max. PV Array Open Circuit Voltage Standby Power Consumption 50Amp 12Vdc 24Vdc 48Vdc 15~18Vdc 30~32Vdc 60~72vdc 40Vdc 60Vdc 105Vdc 1W 2W DC Voltage Accuracy +/-0.3% Joint Utility and Solar Charging INVERTER MODEL InvertFlex InvertFlex Invert Flex InvertFlex 1K 2K 3K 5K Max Charging Current 50Amp 110Amp Default Charging Current 50Amp 50Amp Table 4 General Specifications INVERTER MODEL InvertFlex InvertFlex Invert Flex InvertFlex 1K 2K 3K 5K Safety Certification CE Operating Temperature Range 0°C to 55°C Storage temperature -15°C~ 60°C Dimension (D*W*H), mm 95 x 240 x 316 Net Weight, kg 5.0 100 x 272 x 355 6.4 6.9 120 x 295 x 468 9.8 30 for more information please visit www.flexston.com TROUBLE SHOOTING Problem Unit shuts down automatically during startup process. No response after power on. Mains exist but the unit works in battery mode. When the unit is turned on, internal relay is switched on and off repeatedly. LCD/LED/Buzzer Explanation / Possible cause LCD/LEDs and buzzer will be active for 3 seconds and then complete off. The battery voltage is too low (<1.91V/Cell) 1. Re-charge battery. 2. Replace battery. No indication. 1. The battery voltage is far too low. (<1.4V/Cell) 2. Battery polarity is connected reversed. 1. Check if batteries and the wiring are connected well. 2. Re-charge battery. 3. Replace battery. Input voltage is displayed as 0 on the LCD and green LED is flashing. Input protector is tripped Check if AC breaker is tripped and AC wiring is connected well. Green LED is flashing. Insufficient quality of AC power. (Shore or Generator) Green LED is flashing. Set “Solar First” as the priority of output source. LCD display and LEDs are flashing Battery is disconnected. Fault code 07 Overload error. The inverter is overload 110% and time is up. 1. Check if AC wires are too thin and/or too long. 2. Check if generator (if applied) is working well or if input voltage range setting is correct. (UPSAppliance) Change output source priority to Utility first. Check if battery wires are connected well. Reduce the connected load by switching off some equipment. Check if wiring is connected well and remove abnormal load. Output short circuited. Fault code 05 Temperature of internal converter component is over 120°C. (Only available for 1-3KVA models) Internal temperature of inverter component is over 100°C. Check whether the air flow of the unit is blocked or whether the ambient temperature is too high. Battery is over-charged. Return to repair center. The battery voltage is too high. Check if spec and quantity of batteries are meet requirements. Fault code 01 Fan fault Replace the fan. Fault code 06/58 Output abnormal (Inverter voltage below than 190Vac or is higher than 260Vac) 1. Reduce the connected load. 2. Return to repair center Fault code 08/09/53/57 Internal components failed. Return to repair center. Fault code 51 Over current or surge. Fault code 52 Bus voltage is too low. Fault code 55 Output voltage is unbalanced. Fault code 56 Battery is not connected well or fuse is burnt. Fault code 02 Buzzer beeps continuously and red LED is on. What to do Fault code 03 Restart the unit, if the error happens again, please return to repair center. If the battery is connected well, please return to repair center. 31 for more information please visit www.flexston.com Appendix: Approximate Back-up Time Table Model Load (VA) InvertFlex 1K Model InvertFlex 3K Model 766 1610 200 335 766 300 198 503 400 139 339 500 112 269 600 95 227 700 81 176 800 62 140 900 55 125 1000 50 112 Backup Time @ 24Vdc 100Ah (min) Backup Time @ 24Vdc 200Ah (min) 200 766 1610 400 335 766 600 198 503 800 139 339 1000 112 269 1200 95 227 1400 81 176 1600 62 140 1800 55 125 2000 50 112 300 449 1100 600 222 525 900 124 303 1200 95 227 1500 68 164 1800 56 126 2100 48 108 2400 35 94 2700 31 74 3000 28 67 Load (VA) InvertFlex 5K Backup Time @ 12Vdc 200Ah (min) 100 Load (VA) InvertFlex 2K Backup Time @ 12Vdc 100Ah (min) Backup Time @ 48Vdc 100Ah (min) Backup Time @ 48Vdc 200Ah (min) 500 613 1288 1000 268 613 1500 158 402 2000 111 271 2500 90 215 3000 76 182 3500 65 141 4000 50 112 4500 44 100 5000 40 90 Note: Backup time depends on the quality of the battery, age of battery and type of battery. Specifications of batteries may vary depending on different manufacturers. 32 for more information please visit www.flexston.com