Cotek CR-20 User manual

REMOTE CONTROL
CR-20
User Manual
CR-20
This manual will aid in the process of installing and operating the Remote Control. Please read and understand this manual
before installing the Remote Control. Please retain this manual for future reference.

2.GENERAL INFORMATION
1.1CAUTIONS /WARNINGS
This document contains important safety instructions for the products produced by COTEK Technologies. Read all
instructions and cautionary markings on the product and on any accessories or additional equipment included in the
installation. Failure to follow these instructions could result in severe shock or possible electrocution. Use extreme caution at
all times to prevent accidents.
All electrical work must be performed in accordance with local and national electrical codes. These instructions are for use
by qualified personnel who meet all local and governmental code requirements for licensing and training for the installation of
electrical power systems with AC and DC voltage up to 600 volts.
Installation, maintenance, and connection of inverters must be performed by qualified personnel, in compliance with local
electrical standards, wiring rules, and the requirements of local power authorities and/or companies.
Safety regulations relevant to the location shall be followed during installation, operation and maintenance. Improper operation
may have a risk of electric shock or damage to equipment and property.
WARNING!
Hazard to Human Life
This type of notation indicates that the hazard could be harmful to
human life.
WARNING!
Shock Hazard
Danger of Shock or electrocution.
WARNING!
Burn / Fire Hazard
Danger of hot surface and/or fire.
CAUTION!
Hazard to Equipment
This type of notation indicates that the hazard may cause damage
to the equipment.
iIMPORTANT
This type of notation indicates that the information provided is
important to the installation, operation and/or maintenance of
the equipment. Failure to follow the recommendations in such a
notation could result in annulment of the equipmentwarranty.
WARNING
Do not use standard telephone cable.
General Safety
WARNING!
Limitations on Use
CAUTION!
Equipment Damage
This equipment is NOT intended for use with life support equipment
or other medical equipment or devices.
This product is designed for indoor/compartment installation. It
must not be exposed to any liquids, moisture of any type.
Only use components or accessories recommended or sold by
COTEK Technologies or its authorized agents.
i IMPORTANT
Do not attempt to install this equipment if it appears to be damaged
in any way. See the Warranty section for instructions on returning
the equipment.

GENERAL INFORMATION
Personal Safety
WARNING!
Personal Injury
Use safe lifting techniques when lifting this equipment as
recommended by the Occupational Safety and Health Association
(OSHA) or other local codes.
Use standard safety equipment when working on this equipment,
such as safety glasses, ear protection, steel-toed safety boots,
safety hard hats, etc.
Use standard safety practices when working with electrical
equipment. (Remove all jewelry, use insulated tools, wear cotton
clothing, etc.)
Never work alone when installing or servicing this equipment. Have
someone nearby that can assist if necessary.
Do not touch the Inverter / Charger during operation. The
temperature of some parts of the inverter may exceed 60° during
operation. Let it cool for at least 5 minutes after shutdown before
touching it.
Ensure that children, pets, and other animals are kept away from
the inverter, solar arrays, battery bank, and utility grid components.
If the equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment may be
impaired.
Equipment Safety
WARNING!
Lethal Voltage
Review the system configuration to identify all possible sources
of energy. Ensure ALL sourcesof power are disconnected before
performing any installation or maintenance on this equipment.
Confirm that the terminals are de-energized using a validated
voltmeter (rated for a minimum 1000 VAC and 1000 VDC) to verify
the de energized condition.
Do not perform any servicing other than that specified in the
installation instructions unless qualified to do so, or have been
instructed to do so by COTEK Technologies Technical Support
personnel.
Toavoid electric shock, disconnect the DC input and AC input of
the inverter at least 5 minutes before performing any installation
or maintenance.
Do not tighten the AC and DC terminals or pull on the AC and DC
wiring when the inverter is running.
WARNING!
Fire Hazard
Do not keep combustible or flammable materials in the same room
with the equipment. Some products contain relays with moving
parts and are not ignition-protected.
Ensure AC, DC, and ground cable sizes conform to local codes.
See product manuals for minimum size requirements.
Ensure all conductors are in good condition.
Do not operate the unit with damaged or substandard cabling.

GENERAL INFORMATION
CAUTION!
Equipment Damage
When connecting cables from the inverter to the battery terminals,
ensure the proper polarity is observed. Connecting the cables
incorrectly can damage or destroy the equipment and void the
product warranty.
Thoroughly inspect the equipment prior to energizing. Verify that no
tools or equipment have been inadvertently left behind.
Ensure clearance requirements are strictly enforced.
Keep all vents clear of obstructions that can prevent proper air flow
around, or through, the unit.
CAUTION!
Equipment Damage
Static electricity may damage electronic components. Take
appropriate steps to prevent such damage to the inverter; otherwise
the warranty may be annulled.
Battery Safety
WARNING!
Explosion, Electrocution, or
Fire Hazard
Ensure the cables (conductors) are properly sized.
Ensure clearance requirements are strictly enforced around
the batteries.
Ensure the area around the batteries is well ventilated and clean
of debris.
Never smoke, or allow a spark or flame near, the batteries.
Always use insulated tools. Avoid dropping tools onto batteries or
other electrical parts.
Never charge a frozen battery.
Never use old or untested batteries. Check each battery’s label for
age, type, and date code to ensure all batteries are identical.
If a battery must be removed, always remove the grounded terminal
from the battery first. Make sure all devices are de-energized or
disconnected to avoid causing a spark.
i IMPORTANT
Use the battery types recommended by COTEK Technologies.
Follow the battery manufacturer’s recommendations for installation
and maintenance.
Insulate batteries as appropriate against freezing temperatures. A
discharged battery will freeze more easily than a charged one.
If a remote or automatic generator control system is used, disable
the starting circuit and/or disconnect the generator from its starting
battery while performing maintenance to prevent accidental starting.
Wear complete eye and clothing protection when working
with batteries. Avoid touching bare skin or eyes while working
near batteries.
Keep plenty of fresh water and soap nearby in case battery acid
contacts skin, clothing, or eyes.
If battery acid contacts skin or clothing, wash immediately with soap
and water. If acid enters the eye, immediately flood it with running
cold water for at least 20 minutes and get medical attention as soon
as possible.

GENERAL INFORMATION
2.1 DISCLAIMERS
IMPORTANT: Please follow installation and wiring instructions exactly as outlined to ensure safety. We have made every
reasonable effort to ensure the accuracy of the instructions in this manual, but COTEK does not guarantee that the information is
error free, nor do we make any other representation, warranty or guarantee that the information is accurate, correct, reliable or
current. The specifications inthismanualare for reference purposes only and aresubject to changewithoutnotice. Foradditional
information please seewww.gpelectric.com.
DISCLAIMER: COTEKdisclaims liability for any direct, indirect or incidental damages caused by, or in case of, installation not
performed following the instructions and cautions in this manual. COTEKwill refuse requests for exchanges or returns, resulting
from the purchase and installation of items which do not comply with local codes. To avoid such concerns COTEKrecommends
installation by a professional electrician or RV technician. Examples that are shown within this manual are for illustrative
purposes only.
2.2 CR-20 KIT PARTS
Please unpack and make sure all parts shown in the list below are included in the kit. If any parts are missing please
contact COTEK‘scustomer service team at http://www.COTEK.com.tw/ or 886-3-3891999
2.3.1 PARTS CHECKLIST
ITEM #
DESCRIPTION
01
CR-20
1
02
50’ Remote Cable
1
Note
2 1

GENERAL INFORMATION
1
Mounting Holes
1
LCD Display
1
CHG Status LED
1
Unit Status LED
1
UNIT ON/OFF
switch
2
CHG ON/OFF
switch
3
UP
Menu Select
4
Down
Menu Select
5
ENTER/SET
Menu Select
6
BACK
Menu Select
1
Shore Power
Menu
9
Unit Readings
Menu
8
Unit
Setup
Menu
7
Setup Menu
2.4 REMOTE FEATURES
1
UNIT ON/OFF - This button is used to turn the CR-20 on or off.
2
Charger ON/OFF - This button is used to turn the ‘Charger’ function of the CR-20 on or off. AC Shore power must be
connected for this switch to operate. Holding this button for 5 seconds will activate bulk charging (AC power connected)
3
UP Menu Select - Use this button to navigate up through the menu functions.
4
DOWN Menu Select - Use this button to navigate down through the menu functions.
5
ENTER / SET Menu Select - Use this button to enter menus and set (save) new values entered.
6
BACK Menu Select - Use this button to exit menus and return to the home screen.
7
Remote Settings Menu - When the > icon is pointing to remote settings, you are in the remote settings menu. This menu
includes options for adjusting settings on the remote control, like brightness, power save mode.
8
Unit Setup Menu - When the > icon is pointing to unit readings, you are in the unit settings menu. These are the
SL-Series Inverter / Charger main settings like search watts, battery types, etc.
9
Unit Readings Menu - When the > icon is pointing to unit readings, you are in the unit readings menu. These are for
display only and no settings can be changed in this menu.
10
Shore Power Menu - When the > icon is pointing to shore power, you are in the shore power settings menu. Use this
setting to adjust the maximum shore power allowed to pass through the SL-Series.
11
Mounting Holes - These 4 holes are used to attach the CR-20 to a suitable wall, using the 4 x Phillips screws
included.

GENERAL INFORMATION
1
5
RJ 45 Cable Entry Point
12
LCD Display - The 4 line LCD display shows the status and information for the CR-20. All setup menus and current
status figures appear on the LCD Display.
13
Charger Status LED - This LED indicates the status of the ‘Charger’ function of the CR-20, Green = Charging. No
colour = Not Charging.
14
Unit Status LED - This LED indicates the status of the ‘Inverting’ function of the CR-20, Green = Inverting. No
colour = Not - Inverting.
15
RJ 45 Cable Entry Point - Remote control cable entry point.
WARNING: Turning the unit OFF does not dis-connect the batteries or AC Power Source. Therefore the “AC output
load” is still active.
WARNING: Only use the remote control cable supplied, using different cables could cause permanent damage to
the CR-20 unit

INSTALLATION
3.1 UNITDIMENSIONS
4.7” (120mm)
5.9” (149mm) 1.22” (31mm)
5.2” (133mm)
®
3.2 MOUNTING REQUIREMENTS
The CR-20 control must be installed in a location that is clean, dry and protected. Make sure the LCD screen is visible and
access to the menu navigation buttons is clear and un-obstructed. Always check for hidden electrical wires, pipes and cables
before drilling, cutting or screwing into walls / cabinets.
3.3” (83mm)
3.9” (98mm)
2.7”
(69mm)

INSTALLATION
3.3 MOUNTING PROCEDURE
To mount the CR-20 on a wall, the opening behind the wall must be at least 2” (5cm) of depth to allow room for the remote and
cable.
1. Cut a 3” x 5” rectangular opening in the wall, ensure there is enough material for the screws to securely mount the remote.
2. Use the CR-20 as a template for the 4 holes, mark the positions of the 4 holes with a pencil/pen.
3. Drill the 4 pilot holes for the #8 x 3/4” screws.
4. Route one end of the remote control cable through the wall opening to the Inverter / Charger, plug this end into the REMOTE
port.
5. Take the other end of the remote cable and plug it into the rear of the CR-20. The remote should power up if the SL-Series
is connected to the battery bank. All power to operate the CR-20 is provided by the SL-Series through the remote cable.
6. When the remote powers up, secure the remote control unit to the wall using the four Phillips screwssupplied.
4.9"
(12.45cm)
2.8"
(7.1cm)

-=DC
Status =-
Cotek
Initializing
-=DC
Status =-
11.68 V
-=DC
Status =-
11.68 V
-=DC
Status =-
11.68 V
-=DC
Status =-
11.68 V
4.1 REMOTE NAVIGATION
OPERATION
“DEFAULT HOME SCREEN”
1. Press the Inverter ON/OFF button to turn the Inverter on, which then automatically powers the remote up. The remote will
take up to 10 seconds to go to the default home screen which is DC Status in the unit readings sub menu. As shown above.
2. Tonavigate through the 4 different sub menus, press the down menu select button once to move the arrow to unit setup,
twice to get to remote settings, 3 times for shore power and 4 clicks returns you back to unitreadings.
3. Toenter any of the sub menus, press the ENTER / SET button. Toexit any of the sub menus, press the BACKbutton.

OPERATION
-=AC INPUT
=-
0 A
-=DC Status
=-
11.68 V
-=VAC
OUT=-
2 VAC
Temperatur
e
Batt : 20.0
-= DC =-
11.68 V
0.0 A
“SET”
“SUB MENU
DOWN”
“SUB MENU
DOWN”
“SUB MENU
DOWN”
4. Tonavigate through the sub menu options, first enter the menu using the ENTER / SET button.
5. Then press the down menu select button to move to the next sub menu option (notice the menu arrow does not move) and
again to move to the next sub menu option, you will cycle back to the start when you have scrolled through all available
options in that sub menu. The unit readings menu options tree is shownabove.
6. Toexit the sub menu options, press the BACK button, this will take you back to the default homescreen.

OPERATION
4.2 SUB MENU ITEMS/OPTIONS
Menu Heading
Selections / Adjustments Range
Default Setting
Shore Pow Max
5 - 50A
30A
Unit Readings
DC
11.68V
0.0A
Read Only
AC INPUT
0 A
0 V
0 Hz
VAC OUT
120 V
60.0 Hz
Temperature
Batt : 20.0°C
Trans : 30.5°C
Fets : 30.6°C
Unit Setup
01 Search Watts
OFF, 5 - 50W
5W
02 LowBatCutOut
9.0 - 12.2 VDC
10.5 VDC
03 VAC Dropout
80 - 100V
85V
04 Max.Charge Time
0.0 - 25.5 HR
12.0 HR
05 Battery Type
Gel, Flooded, AGM 1, AGM 2, Custom
AGM 1
06 Charge Rate
0 - 100%
80%
07 Final Charge
Multi-Stage, Float-Stage, Silent-Stage
Multi-Stage
08 ABS Cha Time
0.5 - 24.0 HR
2.0 HR
09 Equalization
Active/Inactive
Inactive
10 DC to Rebulkt?
12.0 - 16.0 VDC
12.1 VDC
Remote Settings
Model & Revisions
Remote : 1544.1
Inverter : 1537.1
Read Only
Load Defaults
Yes / No
No
Set PIN
Locked, Unlocked, Change Pin
(Pin = 0000)
Unlocked
Power Save
OFF, 1 - 60 Minutes
OFF
Screen Setup
Contrast = 0 - 100%
80%
Pwr Up Always
Yes, No
Yes

OPERATION
SHORE
POW. MAX
SHORE
POW. MAX
SHORE
POW. MAX
SHORE
POW. MAX
-=DC Status
=-
“ENTER MENU”
“MODIFY UP”
“MODIFY UP”
“SET”(Save value)
AFTER SAVING
REMOTE WILL GO BACK TO
“DEFAULT HOME SCREEN”
4.3 SHORE POWER MAX MENU
Menu Heading
Selections / Adjustments Range
Default Setting
Shore Power Max
5 - 50A
30A
The shore powermaxmenuenables the user toquicklychangeyourshoremaxsettingtocoordinatewiththecircuitbreakerrating
fromtheincomingACsource. ThissettingensurestheACloadsreceivethemaximumcurrentavailablefromtheutility/generator.
When the total currentused topower theACloads(appliances)andcharge thebatteries begins toapproach theshorepowermax
setting, the current that was used for charging the batteries is reduced. This ensures the AC loads have the required current to
keep operating.
Set the shore power max setting to match the current rating of the utility power or the generator’s circuit breaker. If you are using
two AC Input sources (utility and generator) to the SL-Series through an external transfer switch, adjust the shore max setting to
the smaller AC circuit breaker size of the twoAC power sources.
The SL-Series has 2 inputs (AC HOT 1 andAC HOT2), but the current is only monitored onAC HOT 1. If you wire the Inverter
/ Charger in Single In - Single Out (50A) configurations (see the SL-Series user manual) the shore power max setting should be
set to 1/2 the input breaker size, which will be 25A (50A/2 = 25A). This is because half the current will pass through AC HOT 1
and the other half throughAC HOT 2 simultaneously.

OPERATION
-=DC
Status =-
-=AC
INPUT =-
0 A
4.4 UNIT READINGS MENU
Menu Heading
Selections / Adjustments Range
Default Setting
Unit Readings
DC
11.68V
0.0A
Read Only
AC INPUT
0 A
0 V
0 Hz
VAC OUT
120 V
60.0 Hz
Temperature
Batt: 20.0°C
Trans: 30.5°C
Fets: 30.6°C
1. DC STATUS
The first value: 11.68 V displays the voltage (VDC) from the battery bank
connected to the SL-Series. This reading is displayed with a 0.01 VDC
resolution.
The second value: 0.0A displays the battery current (VDC) either being
discharged (inverting mode) or charged (charging mode) from/into the
battery bank.
A negative value, e.g. -35.0A shows that the batteries are dis-charging
and the SL-Series is inverting.
A positive value, e.g. 40.0A shows that the batteries are charging and
the SL-Series is in charging mode.
2. AC INPUT
The first value is showing the total AC Amps being used by the inverter
for charging and for powering any AC Loads. This reading is always
displayed as a positive number. If the charger is using 15A to charge the
batteries and the connected AC load is using 10A then the total AC Input
value is displayed as 25A.
Thesecondvalueisshowingthevoltage(AC)oftheconnectedACPower
source (Utility or Generator). This will usually read120V.
The third value is showing the frequency of the connected AC Power
source (Utility or Generator). This is displayed as a unit of frequency:
Hertz (Hz).

OPERATION
-=VAC
OUT=-
2 VAC
Temperatur
e
Batt : 20.0
3. VAC OUT
The first value displays the AC voltage measurement at the inverter’s
output terminals.
When in inverting mode this reading is displaying the inverter’soutput
voltage.
When in charging or AC pass through mode, the display is showingthe
AC voltage that is passing through the SL-Series from the AC power
source (utility or generator)
4. TEMPERATURE
Batt: Displays the temperature of the SL-Series battery temp sensor
which should be connected to the battery bank
Trans: Displays the temperature of the main power transformer inside
the SL-Series.
Fets: Displays the temperature of the field effect transistors (FETs)
inside the SL-Series.
4.5 UNIT SETUP MENU
Menu Heading
Selections / Adjustments Range
Default Setting
Unit Setup
01 Search Watts
OFF, 5 - 50W
5W
02 LowBatCutOut
9.0 - 12.2 VDC
10.5 VDC
03 VAC Dropout
80 - 100V
85V
04 Max.Charge Time
0.0 - 25.5 HR
12.0 HR
05 Battery Type
Gel, Flooded, AGM 1, AGM 2, Custom
AGM 1
06 Charge Rate
0 - 100%
80%
07 Final Charge
Multi-Stage, Float, Silent
Multi-Stage
08 ABS Cha Time
0.5 - 24.0 HR
2.0 HR
09 Equalization
Active/Inactive
Inactive
10 Rebulk Volt
12.0 - 16.0 VDC
12.1 VDC

OPERATION
UNIT SETUP
01 SEARCH
WATTS
UNIT SETUP
02
LowBatCut
UNIT SETUP
03 VAC
Dropout
1. SEARCH WATTS
The search watts feature helps save the battery power by reducing the
SL-Series output to search pulses when there is no detectable load.
If a load greater than the wattage level setting turns on while the Inverter
/ Charger is searching, the inverter starts inverting mode, to power the
appliance.
If the SL-Series spends a lot of time searching and you can tolerate
small loads <5 watts, being off, then use the search watts feature. If you
havesmallloads(digitalclocks,satellitereceivers,wifirouters)whichneed
to be on, then the search watts feature should be turned off.
2. LOW BATTERY CUTOUT (LBCO)
The lowbattcutout setting sets the DC voltage level that turns off the SL-
Series to protect the battery bank from over-discharge damage. If the
battery bank voltage drops below the LBCO selected set-point
continuously for more than one minute, the fault LED comes on and the
Inverter / Charger turns off.
The default setting for the lowbattcutout is 10.5 VDC and the range is
9.00 to 12.2 VDC (increments by 0.01 VDC).
If you want to cycle the batteries slightly - but don’t want to discharge
them more than 20% - then set the LBCO from 11.5 - 12.2 VDC.
In some applications, such as those installed in an off-grid home orwhen
doing a lot of boon-docking (dry camping) in your RV,you may want to
cycle down to 50% by setting the LBCO from 10.0 to 11.4 VDC. Higher
discharge rates will decrease batterylife.
In extreme circumstances you have the ability to discharge the batteries
to 80% by setting the LBCO between 9.0 - 9.5 VDC. Higher discharge
rates will decrease batterylife.
3. VAC DROPOUT
The VAC dropout is used to select the minimumAC voltage that must be
present attheACInputbeforetheSL-Seriesswitchestheinvertingmode
off. ThissettingalsodeterminestheminimumACvoltagethresholdwhere
the AC Pass through disengages and the inverting mode is switched on
to provide AC power. This feature protects any sensitive AC appliances
from shore power fluctuations.
The default setting for the VAC dropout is 85 VAC and the range is 80 to
100 VAC (increments by 1 VDC).
If the setting is setto80 VAC,when theACinputvoltage drops to 80volts
theSL-SerieswillswitchfromACpassthroughmodetoInvertingmode.

OPERATION
UNIT SETUP
04 Max.Cha
Time
UNIT SETUP
05 Battery
Type
4. MAX CHARGE TIME
Themaxchargetimeisasafetyfeaturethatensuresabnormalconditions
donotcausethechargertoholdbatteriesatahighvoltageforaprolonged
period of time.
This option sets the maximum time the charger is allowed to charge the
batteries.
The default time is 12.0 hours and the range is 0 to 25.5 hours
(increments by 0.1 hours).
5. BATTERY TYPE
The battery type option is used to change the charging profiles for each
of the following battery types: Gel, Flooded, AGM1, AGM2 and Custom.
The fixed voltage settings are shown in the table below for the different
types of batteries.
The custom battery type setting allows the user to individually adjust the
floatandabsorbchargevoltagesettingsforyourbatteries. Thefollowing
voltage settings can be modified and set when the custom battery type
option is selected;
Absorb - Sets the level at which the charging voltage is held constant during an absorption cycle. The default value is 14.0V
and the range is 12.0 to 16.0V (increments by 0.1 VDC).
Float - Sets the level at which the charging voltage is held constant during a float cycle. The default value is 14.0V and the range
is 12.0 to 16.0 VDC (increments by 0.1 VDC).
Equalize - Sets the level at which the charging voltage is held constant during an equalization cycle. The default value is 14.0V
and the range is 12.0 to 16.0 VDC (increments by 0.1 VDC).
Type
Inverter
Voltage
Absorption
Voltage
Float
Voltage
Equalization
Voltage*
Gel
12 VDC
14.1 VDC
13.6 VDC
No Equalize
Flooded
12 VDC
14.6 VDC
13.4 VDC
15.5 VDC*
AGM 1
12 VDC
14.3 VDC
13.1 VDC
15.5 VDC*
AGM 2
12 VDC
14.5 VDC
13.5 VDC
No Equalize
Custom
12 VDC
14.1 VDC
13.6 VDC
14.1 VDC
*only applicable if equalization option is enabled

OPERATION
UNIT SETUP
06 Charge
Rate
UNIT SETUP
07 Final
Charge
UNIT SETUP
08 ABS Chg
Time
6. CHARGE RATE
The charge rate is used to set the maximum charge rate allowed to
chargethebatteriesduringbulk,absorption,floatandequalizecharging.
Setting the charge rate to 0% will stop the batteries from charging whilst
continuingtoallowpassthroughpower. Settingthechargeratebetween
0-100%willlimit/increasethechargeratetothebatterybank. Reducing
the charging rate can help to reduce battery overheating caused by
charging at high charge rate %.
The SL-Series has a maximum charge rate of 100 Amps / hour, so
setting the charge rate to 50% will de-rate this charging capacity to 50
Amps / hour.
A guideline for battery bank charge rates is, for fast charging: C/5, where C is the total amp hour capacity of the battery bank.
For example a 400Amp hourcapacity will have a fast charge rate of 80Amps/hour (400/5 = 80), which means setting the charge
rate to 80%.
For slow charge rates a simple guideline is C/20, so a slow charge rate for the 400 Amp hour capacity battery bank will have a
slow charge rate of 20 Amps/hour (400/20 = 20), which means setting the charge rate to 20%.
The default setting is 80% and the range is from 0%-100% (in 10% increments).
7. FINAL CHARGE
The final charge setting is used to adjust what charging state the SL-
Series transitions to after the absorption stage has finished.
The default setting is multi-stage, the other options are: silent and float.
Multi: The multi setting transitions from the absorption stage to float.
Once in the float stage for four hours with no DC loads on the batteries,
thechargerentersthefullchargestate. Infullchargemode,thecharger
automatically stops charging but is still on and actively monitoring the
battery voltage. Multi is the most commonly used charge mode. It is
suitableformostapplicationsandwillassureafullchargetothebatteries.
Float: The float stage is a maintenance charge mode that maintains a constant voltage - while delivering up to the maximum
rated current of the charger in order to power any DC loads connected to the battery bank. Float mode is typically used when
the charger is the only charge source connected to the battery bank. This mode will maintain the batteries at float voltage.
Silent: Silent mode stops charging once it transitions from absorb mode. Once the charger enters the silent mode the battery
voltageiscontinuouslymonitored. Ifthebatterybankfallstoapredeterminedsetpoint,thechargerrestartsthebulkchargemode
and transitions to absorb charge mode and back to silent mode until the predetermined voltage set point is reached again. Silent
mode is typically used when an alternative charge source is available and able to fully charge or finish the charge cycle after the
absorb stage. A major difference between multi mode and silent mode is that the silent mode returns to bulk mode instead of
float mode. In silent mode you can also adjust the re-bulk set-point (see menu 10) in order to allow the alternate charge source
to provide more of the batterycharging.
8. ABS (ABSORPTION) CHARGE TIME
TheABS charge time is used as a safety feature that ensures abnormal
conditionsdonotcausethechargertoholdthebatteriesatahighvoltage
for a prolonged period of time. This setting option allows the user to set
a maximum time the charger is allowed to operate in either constant
current or constant voltage charge modes. If the charger reaches the
max time setting, it will transition to the silent charge stage.
The default setting is 2.0 hours and the range is 0.5 - 24.0 hours (in 0.1
hour increments).

OPERATION
UNIT SETUP
09
Equalization
UNIT SETUP
10 DC to
9. EQUALIZATION
The equalize setting is used to remove sulfates that may have built up
on the plates within the battery. The build-up of sulfates on the battery
plates can reduce the overall capacity of the battery.
Equalizing batteries involves carrying outa controlled overcharge ofthe
batteries, after the batteries have been fullycharged.
Equalize charging is activated by selecting active. The charging cycle
will then follow the following sequence: BULK - ABS - EQU - FINAL.
The maximum equalization stage time is 4 hours and the SL-Series will
enter final charging state after the equalization time is complete.
Equalization charging will be automatically switched off whenAC shore power is disconnected or the Inverter / Charger is turned
off and turned on again. Therefore, the function will only be activated when the user wants to use it, every time the SL-Series is
turned off the equalization setting will default toINACTIVE.
Equalizing batteries produces hydrogen and oxygen gas. Ensure the battery compartment has adequate ventilation to dissipate
this gas to avoidexplosions.
Ensure your batteries can be equalized - only equalize batteries that can be equalized. Consult your battery manufacturer for
further information. Equalizing batteries not designed for equalizing can permanently damage them.
Gel and AGM2 battery types are not permitted for equalizing.
Whilst using the equalizing function it is advised not to connect loads to the AC Output, because this will reduce the charging
voltage and prevent the SL-Series from going to equalization.
Ensure the DC loads will not be damaged by the higher voltage applied to the batteries during the equalize charge. It is advised
to disconnect the DC loads to preventdamage.
It is recommended to equalize batteries periodically depending on usage rates ranging from once or twice per year to once a
month. Consult your battery manufacturer for further information.
10. REBULK VOLTAGE
The rebulk? voltage setting is used to set a DC voltage set point when
the silent final charge is selected in the 07 - final charge option. This
setting should be the lowest DC volts you want the batteries to fall be-
fore starting a new bulk charge cycle. Typically the lowest DC volts the
batteries are allowed to fall is 12.0 to 12.2VDC.
Thedefaultsettingis12.1Vandtherangeis12.0-16.0VDC(Increments
by 0.1 VDC).

OPERATION
Model &
Revisions
Load
Defaults
Edit
Set PIN
****
4.6 REMOTE SETTINGS MENU
The remote settings menu provides access to a range of settings that are based around the remote control operation including
system information and the opportunity to re-load factory default values.
Remote Settings
Model & Revisions
Remote : 1544.1
Inverter : 1537.1
Read Only
Load Defaults
Yes / No
No
Set PIN
Locked, Unlocked, Change Pin
(Pin = 0000)
Unlocked
Power Save
OFF, 1 - 60 Minutes
OFF
Screen Setup
Contrast = 0 - 100%
80%
Pwr Up Always
Yes, No
Yes
1. MODEL & REVISIONS
Thisreadonlydisplayshowsthemodelnumberandrevisionsoftheboth
the SL-Series and the Remote control. It is prudent to make a note of
these two numbers for future reference. If you ever need to contact
COTEK Technicalsupportthesetwonumberswillberequiredtohelp the
customer service personnel help you.
2. LOAD DEFAULTS
Thissettingrestoresallfactorydefaultvaluesforboththeremotecontrol
and the SL-Series. Torestore factory defaults, select the menu then set
to YES and confirm.
3. SET PIN
This setting can be used to set a pin number to lock the customizable
setting menu options on the SL-Series and remote control. This feature
is useful when the operation of the Inverter / Charger has been set up
by an experienced user / installer. Restricting access to menus with a
password can avoid unauthorized changes to your settings by
inexperiencedusers.
Toset a pin use the right menu select button then use the UP menu to
input a number, use the down menu select button to move to the next
number. Tosave the pin press the right menu select button.
After the pin has been set you then have the option of locking setup or
unlocking setup. Use the right menu button to select either lock or
unlock and the down menu button to toggle between the two options.