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37

5

 

ConstruCtion, layout & Controls

LCD Display – Fault Messages

The LCD display (1, Fig. 5.1) indicates the following fault messages when SCC-30AB  
stops operating.

DISPLAy

DESCRIPTION

CAUSE OF FAULT

Alarm: OC 

Over Current

Over Current

The current exceeds 150% of the rated current (45A)

Alarm: OT

Heat Sink over 

temperature

Heat sink temperature exceeds 90°C.

Alarm: CPF00 

Link Master error

Display Panel 

error

The CPU is not able to exchange data with the 

Display Panel.

Alarm: CPF04

DC / DC 

LowV

Low Battery Voltage 

< 9V for 12V Battery 

< 18V for 24V Battery

1. Batteries are discharged below the minimum 

    acceptable level, or 

2. DIP Switch 1 is set for 24V battery but the battery is 12V.

Alarm: CPF09

Heat Sink SR Open

Low operating

temperature

Operating temperature of the unit is below the 

specified limit of 0°C or 32°F.

Battery Temperature 

Sensor (BTS) displays:

- - - 0°C

Battery temperature

is below 0°C

1. Lower limit of temperature compensation is 0°C. 

2. Negative values can not be displayed. 

NOTE: See Table 7.1 under Section 7 – Troubleshooting for remedies 

Table 5.1. Fault Messages on the LCD Display.

Back of the Unit

The back of the unit (Fig 5.2) has the following input / output connections and DIP 
Switches for various settings. 

NAME

DESCRIPTION

PV+ 

Connecting terminal for Solar Array Positive

PV–

Connecting terminal for Solar Array Negative

B

Connecting terminal for Battery cable Positive 

Battery –

Connecting terminal for Battery cable Negative 

DIP Switch 1

ON*

Selection of Battery Voltage for 12V system

OFF

Selection of Battery Voltage for 24V system

DIP Switch 2,3,4 

For programming Battery Type & Charging Algorithm (See Table 6.1)

DIP Switch 5

ON

Selection of Auto Equalization

OFF*

Selection of Manual Equalization

BTS

Battery Temperature Sensor for temperature compensation

 *NOTE: Factory preset condition  

Table 5.2. Control & Terminal Connections (At the back of the unit).

Содержание SCC-30AB

Страница 1: ...30 Amp Solar Charge Controller SCC 30AB Owner s Manual Please read this manual before operating your charge controller...

Страница 2: ...Description of Solar System 18 3 General information Batteries 15 4 Principle of Operation Features 21 5 Construction Layout and Controls 33 6 Installation and Operation 38 7 Troubleshooting 47 8 Spe...

Страница 3: ...Controller should be installed indoor only in a well ventilated cool dry environment Do not expose to moisture rain snow or liquids of any type Preventing fire and explosion hazards Working with the...

Страница 4: ...ng of 30 A The Short Circuit Current of the Solar Array should be less than 30A Do not exceed a Battery Voltage of 24V nominal Do not use a battery less than 12V Charge only 12 or 24V Lead Acid batter...

Страница 5: ...t Current and is abbreviated as Isc When the Panel is shorted the Voltage in the circuit is zero Conversely the maximum Voltage occurs when there is a break in the circuit This is called the Open Circ...

Страница 6: ...r Panel There is a point on the knee of the I V Curve where the maximum power output is located and this point is called the Maximum Power Point MPP The voltage and current at this Maximum Power Point...

Страница 7: ...ys By the intensity of the incident light By the wavelength of the incident rays The materials used in Solar Cells have different spectral responses to incident light and exhibit a varying sensitivity...

Страница 8: ...l The nominalVoltage of a Ni Cad Ni Fe battery bank can be made the same as a lead acid bank just by juggling the number of cells 10 cells for 12V 20 cells for 24V and 40 cells for 48V systems However...

Страница 9: ...ositive plate gradually turns to Lead Dioxide chocolate brown color and the Lead paste in the Negative plate turns to Sponge Lead slate gray color Such charged cell is ready to be used The above grid...

Страница 10: ...4V per cell at 25 C 77 F or 14 4V for a 12V battery at 25 C 77 F that restores the last 20 to 30 of the capacity On completion of this stage of charging the Lead Sulphate at the Positive and Negative...

Страница 11: ...charge and has a low rate of self discharge An AGM battery will handle overcharging slightly better than the Gel Cell Non Sealed Vented Flooded Wet Cell Lead Acid Batteries In a non sealed vented floo...

Страница 12: ...electrical energy the battery can store and deliver to a load It is determined by the amount of current any given battery can deliver over a stipulated period of time The energy rating is expressed in...

Страница 13: ...Ah capacity if it is slowly discharged over 20 hours at the rate of C 20 A or 5A However if it is discharged at a rate of 2 Hrs C 2A or 50A then theoretically it should provide 100 Ah 50A 2 Hours How...

Страница 14: ...y the manufacturer Battery Efficiency A lead acid battery has an efficiency of only 75 85 The energy lost appears as heat and warms the battery This means that the Ampere Hour Ah energy required to ch...

Страница 15: ...e Change as 5 mV C Cell or 30mV 03V for a 6 cell 12V battery Battery Temperature Absorption Voltage 12V Battery 40 C 13 95V 25 C Reference 14 4V Reference 10 C 14 85V In case temperature compensation...

Страница 16: ...as a function of the state of charge 80 60 40 20 0 0 20 40 60 80 100 State of charge Temperature C slushy until hard 80 60 40 20 0 0 20 40 60 80 100 State of charge Temperature C slushy until hard Ser...

Страница 17: ...teries 1 to 4 are paralleled connected together and this common Positive connection becomes the Positive terminal of the 12V bank Similarly the four Negative terminals of Batteries 1 to 4 are parallel...

Страница 18: ...None of the batteries will see an overcharge condition If the Positive output cable of the battery charger Cable A is connected to the Positive battery post of the first battery Battery 1 in Fig 3 3...

Страница 19: ...e a Find out the power rating of each AC and DC device in Watts W If Watt rating is not available calculate the Watt rating using Formulae 1 or 2 b Determine calculate the power drawn from the battery...

Страница 20: ...stage charger may be used Constant Current Bulk Charging followed by Constant Voltage Boost Absorption Charging followed by Constant Voltage Float Charging followed by Constant Voltage Equalization E...

Страница 21: ...racter LCD Display with backlight for display of operating information and data Additional LED indication for displaying the charging stages Optional remote Battery Temperature Sensor BTS Model DC BTS...

Страница 22: ...e Switch which is 3 33 ms Number of cycles of switching per second is called the PWM Frequency Mathematically Frequency 1 Pulse Period T and is 300 Hz in this case 1 33 3 ms 300 Hz The duration of ON...

Страница 23: ...Duty Cycle regularly at a very fast rate The Duty Cycle is proportional to the difference between the sensed battery voltage and the Voltage Regulation Set Point Once the specified Voltage Regulation...

Страница 24: ...Duty Cycle of 0 to 10 which is equivalent to Constant Voltage Transition from one stage to the other will be controlled by the selected Voltage Regulation Set Points as follows Absorption Voltage Reg...

Страница 25: ...Voltage Set Point displayed on Screen 5 Fig 5 3 under Bulk The Status LED will blink GREEN The number of blinks indicates battery voltage levels as follows Blinking Pattern of Status LED Bulk Stage No...

Страница 26: ...on the screen under Bulk The Status LED will blink GREEN 5 times NOTE During Absorption Stage if the load current is more than the current from the solar panel the battery voltage will drop If the ba...

Страница 27: ...anels should be at least 5 to 10 of the Ah capacity of the battery bank Equalization is intentional overcharging of the battery for controlled period of time Routine equalization cycles are often vita...

Страница 28: ...d before the cells with lower voltage The more a battery is cycled the more cell voltage separation takes place In a healthy battery all the individual cells will have the same voltage and same specif...

Страница 29: ...ack of the unit Fig 5 2 Please refer to Fig 4 1B Stage 1 Bulk Stage During the night of the 27th day the battery voltage will drop below the Float Transition Voltage Set Point Vf Curve portion A1 to B...

Страница 30: ...s Change over to the next Float Voltage Regulation Set Point Vf is possible only after the battery voltage is held at the selected Equalization Voltage Regulation Set Point Ve for continuous or cumula...

Страница 31: ...rtion D1 to E1 the Switch operates under PWM control by feeding pulsing Short Circuit Current Isc with very low Duty Cycle of 0 to 10 to keep the battery voltage constant at the Float Voltage Regulati...

Страница 32: ...battery temperatures often vary up to 15 C from the 25 C reference The Absorption Float Equalization Voltages must then be adjusted or a controller with Temperature Sensor should be used Table below...

Страница 33: ...uired to be made in the wall panel to accommodate the PCB at the back of the unit As the components at the back of the unit will be hidden and protected behind the wall panel the components at the bac...

Страница 34: ...75V below Absorption setting 1 5V below Absorption setting 3 Blinks Green Bulk 0 50V below Absorption setting 1 0V below Absorption setting 4 Blinks Green Bulk 0 25V below Absorption setting 0 5V bel...

Страница 35: ...tV Screen 2 It is a resettable counter that displays the Ampere Hours Amp Hours of energy in Ah delivered by the solar panel into the batteries with effect from the time the solar panel has been conne...

Страница 36: ...OTE The battery temperature can not be displayed below 0 C If the battery temperature falls below 0 C the display will read C Amp Watts BatV 0 0 0 0 12 0 Amp Hours 0 Ah Total Amp Hours 0 Ah Mode Charg...

Страница 37: ...or BTS displays 0 C Battery temperature is below 0 C 1 Lower limit of temperature compensation is 0 C 2 Negative values can not be displayed NOTE See Table 7 1 under Section 7 Troubleshooting for reme...

Страница 38: ...fire due to short circuit Further higher wiring resistance reduces current flow resulting in higher charging times Voltage drop in the wiring from the Charge Controller to the battery results in unde...

Страница 39: ...to get started using the SCC 30AB controller However please review the entire manual to ensure best performance and years of trouble free service Notes SCC 30AB prevents reverse current leakage at ni...

Страница 40: ...ing source and that there is adequate cooling air flow across the face plate to remove the heat dissipated from its surface A drawing for making the cutout in the wall panel is given at Fig 6 1 not to...

Страница 41: ...nect the BATTERY first Be careful that bare wires do not touch the metal case of the controller Connect battery Negative first and then the battery Positive Use 32V 35A fuse in series with the Positiv...

Страница 42: ...olar Panel Array while connected to the controller since this will damage the controller 7 For most effective surge protection it is recommended that the Negative system conductor be properly grounded...

Страница 43: ...LA battery For a generic non sealed vented flooded well cell Lead Acid battery choose Battery Type 4 Note 1 All Voltage values are at battery temperature of 25 C 77 F 2 All the voltages given in the T...

Страница 44: ...Both automatic and manual equalizations can be performed using the standard charging programs Table 6 1 Manual Equalization SCC 30AB is shipped with the DIP Switch 5 Fig 5 2 set for manual equalizatio...

Страница 45: ...on Temperature Compensated Battery Charging Please read background information on temperature compensation under heading Effect of Temperature on Battery Voltage on page 15 An optional Battery Tempera...

Страница 46: ...trolyte temperature can affect charging battery capacity and battery life The greater the range of battery temperatures the greater the impact on the battery For example if the battery temperature fal...

Страница 47: ...larm OT Blinking Red Heat Sink over Temperature Heat sink temperature exceeds 90 C Alarm CPF00 Link Master Error Solid Red Display Panel Error The CPU is not able to exchange data with the Display Pan...

Страница 48: ...he Battery Voltage is low the controller is not charging the batteries and may be damaged SYMPTOM 2 Battery Voltage IS TOO HIGH The Status LED 2 Fig 5 1 will be blinking Green at 5 blinks and the Batt...

Страница 49: ...Cd CHARGING ALGORITHM 4 Stage Bulk Absorption Float Equalization CHARGING PROGRAMS 8 Programs Switch selectable ABSORPTION VOLTAGE 14 0V to 16 0V For maximum 1 hour FLOAT VOLTAGE 13 4V 14 5V EQUALIZAT...

Страница 50: ...C to 85 C 67 F to 185 F HUMIDITY 95 Non condensing MECHANICAL DIMENSIONS W x D x H 190 X 34 x 108 mm 7 5 X 1 35 x 4 25 in WEIGHT 0 4 kg 0 8 lb ENCLOSURE FACE PLATE Powder coated steel For indoor use...

Страница 51: ...sonable number of opportunities to do so Warranty service shall be performed only by the Warrantor Any attempt to remedy the defect by anyone other than the Warrantor shall render this warranty void T...

Страница 52: ...Notes...

Страница 53: ...Notes...

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