Go Power GP-PWM-10-FM User manual

GP-PWM-10-FM (with LiFePO4)
________________________________________________________________________
© 2019 Go Power!
GP-PWM-10-FM
User Manual

GP-PWM-10-FM
2
© 2018 Go Power!
Contents
1.0 Installation Overview 3
1.1 Introduction 3
1.2 System Voltage and Current 3
1.3 Battery Type 3
1.4 Low Voltage Disconnect Function (USB Port) 4
1.5 Regulatory Information 4
1.6 Specifications 4
2.0 IMPORTANT SAFETY INSTRUCTIONS 5
3.0 Tools and Materials Needed 8
4.0 Choosing a Location 8
5.0 Installation Instructions 9
6.0 Wiring Diagram 12
7.0 Operating Instructions 13
7.1 Power Up 13
7.2 Setting the Battery Charging Profile 13
7.3 Battery Charging Profile Chart 14
7.4 Viewing the Controller Display Information 14
7.5 Resetting the ampere hours charged 16
7.6 Errors 17
8.0 Display Symbols 18
9.0 USB Charging 19
10.0 Frequently Asked Questions (FAQs) 19
11.0 Troubleshooting Problems 21
11.1 Problems with the Display 21
11.2 Problems with Voltage 22
11.3 Problems with Current 23
12.0 Limited Warranty 26
12.1 Repair and Return Information 26
13.0 Installation Template 26

GP-PWM-10-FM
3
© 2018 Go Power!
1.0 Installation Overview
1.1 Introduction
A Solar Controller (or Charge Controller / Regulator) is an essential
component of your photovoltaic solar system. The Controller maintains
the life of the battery by protecting it from overcharging. When your
battery has reached a 100% state of charge, the Controller prevents
overcharging by limiting the current flowing into the batteries from your
solar array.
The GP-PWM-10-FM uses Pulse Width Modulation (PWM) technology
and a unique four stage charging system that includes an optional
equalize setting to charge and protect your battery bank. The GP-PWM-
10-FM features an LCD digital display that shows the charge current of
the solar array, battery voltage and battery state of charge.
1.2 System Voltage and Current
The GP-PWM-10-FM is intended for use at 12 VDC nominal system
voltage and is rated for a maximum continuous DC input current of 12.5A
and input voltage of 35VDC.
Per the National Electric Code (NEC) article 690.7 and 690.8, PV module
nameplate ratings at Standard Test Conditions (STC) must be multiplied
by required values (typically 1.25 for both voltage and current) to obtain
the true voltage and continuous current available from the module.
Applying the NEC factors, the maximum allowable nameplate PV Panel
rated Isc is 10A (10A x 1.25 = 12.5A), and the maximum voltage, Voc is
28VDC (28VDC x 1.25 = 35VDC).
The voltage and current ratings of all equipment connected to PV panels
must be capable of accepting the voltage and current levels available
from PV panels installed in the field.
1.3 Battery Type
The GP-PWM-10-FM is suitable for use with lead acid and lithium
batteries (vented, GEL, LiFePO4(LFP) or AGM type).

GP-PWM-10-FM
4
© 2018 Go Power!
1.4 Low Voltage Disconnect Function (USB Port)
To protect the battery against over-discharge this function automatically
switches off the USB output port when battery voltage is lower than 11.0
VDC. As soon as the battery reaches a voltage of 12.8 VDC the USB
output port is switched on again.
1.5 Regulatory Information
1.6 Specifications
Description
Value
Dimensions
(H x W x D):
149 x 98 x 32 mm
5.87 x 3.86 x 1.26 in
Weight: 260 g / 9.2 oz
Maximum Wire Gauge:
#4 AWG
Warranty: 5 years
•PWM Charging
•4 Battery Charging
Profiles
•4-Stage Charging
•Monthly Equalize
Option
•Displays Charging
Current, Battery
Voltage, Battery State
of Charge, and Amp
Hours Charged Since
Last Reset
•Reverse Polarity
Protected
•Temperature
Model
GP-PWM-10-FM
Nominal System Voltage 12 VDC
Range of Battery Input
Voltage
9 – 15.5 VDC
Maximum Solar Continuous
DC Charge Current Input
12.5 ADC
Charging Output DC
Voltage Range
9 – 14.9 VDC
Maximum Solar DC Input
Voltage
35 VDC
Maximum Series Fuse or
Circuit Breaker
Solar/Battery
15 A
Operating Consumption
(Display backlight on)
15 mA
Operating Consumption
(Display backlight off)
6 mA
Battery Types Supported Vented & Sealed Lead Acid (GEL,
AGM, Flooded, etc.). Lithium
(LiFePO4)

GP-PWM-10-FM
5
© 2018 Go Power!
Bulk/Absorption Voltage
(Sealed/GEL, AGM/LFP,
Flooded)
14.1/14.4/14.4 VDC
(25°C / 77°F), 30min / Day
or 2hr if battery voltage < 12.3 VDC
Compensated
•RoHS Compliant,
Environmentally Safe
•Accepts up to 160
Watts of Solar at 12
Volts
Float Voltage
13.7V (25°C / 77°F), 14.0V (LFP)
Equalization Voltage 14.9V (25°C / 77°F),
2h / 28 Days
or if battery voltage < 12.1 VDC
Temperature Compensation
- 24mV/ºC / -13mV/ºF
USB charger
5V, 1500mA
Low Voltage Disconnect
(USB) 11.0 VDC Reconnects once battery reaches
12.8 VDC
Operating Temperature
- 40 to 85°C / - 40 to 185°F
Display Operating
Temperature
- 10 to 55°C / 14 to 131°F
Humidity
99% N.C.
Protection Battery Reverse Polarity, SolarArray
Reverse Polarity, Over Temperature,
PV Short Circuit, Over Current
2.0 IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
THIS MANUAL CONTAINS IMPORTANT INSTRUCTIONS FOR
MODEL GP-PWM-10-FM THAT SHOULD BE FOLLOWED
DURING INSTALLATION AND MAINTENANCE OF THE GP-
PWM-10-FM.
Disconnect all
power sources
Electricity can be very dangerous. Installation
should be performed only by a licensed
electrician or qualified personnel.

GP-PWM-10-FM
6
© 2018 Go Power!
Battery and
wiring safety
Observe all safety precautions of the battery
manufacturer when handling or working
around batteries. When charging, batteries
produce hydrogen gas, which is highly
explosive.
Wiring
connections
Ensure all connections are tight and secure.
Loose connections may generate sparks and
heat. Be sure to check connections one week
after installation to ensure they are still tight.
Work safely
Wear protective eyewear and appropriate
clothing during installation. Use extreme
caution when working with electricity and
when handling and working around batteries.
Observe
correct polarity
Reverse polarity of the battery terminals and
array will cause the controller to give a
warning tone. The controller will not function
unless battery terminals are connected to a
battery with proper polarity. Failure to correct
this fault could damage the controller.
Do not exceed
the GP-PWM-
10-FM Amp
current and
max voltage
ratings
The maximum current of the solar system is
the sum of parallel-connected PV module–
rated short circuit Currents (Isc) multiplied by
1.25. The resulting system current is not to
exceed 12.5A. If your solar system exceeds
this value, contact your dealer for a suitable
controller alternative.
Do not exceed
the GP-PWM-
10-FM max
voltage ratings
The maximum voltage of the array is the sum
of the PV module–rated open-circuit voltage of
the series connected modules multiplied by
1.25 (or by a value from NEC 690.7 provided
in Table 690.7 A). The resulting voltage is not
to exceed 35V. If your solar system exceeds
this value, contact your dealer for a suitable
controller alternative.
IMPORTANTES INSTRUCTIONS DE
SECURITE
CONSERVEZ CES INSTRUCTIONS
CE MANUAL CONTIENT DES INSTRUCTIONS IMPORTANTES
POUR LE MODÈLE GP-PWM-10-FM QUI DOIVENT ÊTRE
SUIVIES PENDANT L’INSTALLATION ET L’ENTRETIEN DU GP-
PWM-10-FM.

GP-PWM-10-FM
7
© 2018 Go Power!
Débranchez
toutes les
sources
d’énergie
L’électricité peut être très dangereuse.
L’installation ne doit être effectuée que par un
électricien agréé ou du personnel qualifié.
Sécurité de la
batterie et du
câblage
Respectez toutes les consignes de sécurité du
fabricant de la batterie lorsque vous manipulez
des batteries ou que vous travaillez à proximité
de celles-ci. Lors de leur chargement, les
batteries produisent de l’hydrogène gazeux
hautement explosif.
Branchements
de câblage
Assurez-vous que tous les branchements sont
serrés et sûrs. Des branchements lâches
peuvent produire des étincelles et de la
chaleur. Vérifiez tous les branchements une
semaine après l’installation pour vous assurer
qu’ils sont toujours serrés.
Travaillez en
toute sécurité
Lors de l’installation, portez des lunettes de
protection et des vêtements adaptés. Faites
preuve d’une grande prudence lorsque vous
travaillez avec du matériel électrique et lorsque
vous manipulez des batteries ou que vous
travaillez à proximité de celles-ci.
Respectez la
polarité
correcte
Une polarité inversée des bornes de la batterie
1 provoquera un signal sonore du régulateur.
Une polarité inversée de la batterie 2 ne
provoquera pas d’alarme. Cependant, le
régulateur ne chargera pas et n’affichera pas
d’informations relatives à la batterie 2 sur
l’écran CL. Le régulateur ne fonctionnera que
si ses bornes batterie 1 sont connectées à une
batterie avec la polarité appropriée. Si ce
défaut n’est pas corrigé, le régulateur risque
d’être endommagé.
Ne dépassez
pas le courant
nominal
maximum du
GP-PWM-10-FM
Le courant maximum du système solaire est la
somme des courants de court-circuit (Isc) des
modules PV connectés en parallèle, multipliée
par 1,25. Le courant du système qui en résulte
ne doit pas excéder 12,5 A. Si votre système
solaire dépasse cette valeur, veuillez contacter
votre revendeur pour obtenir un régulateur plus
approprié.

GP-PWM-10-FM
8
© 2018 Go Power!
Ne dépassez
pas la tension
nominale
maximum du
GP-PWM-10-FM
La tension maximum des panneaux est la
somme de la tension à vide du module PV des
modules connectés en série, multipliée par
1,25 (ou par une valeur de l’article 690.7 du
Code National Électrique fournie dans le
tableau 690.7 A). La tension qui en résulte ne
doit pas excéder 35 V. Si votre système solaire
dépasse cette valeur, veuillez contacter votre
revendeur pour obtenir un régulateur plus
approprié.
3.0 Tools and Materials Needed
•Flathead Screwdriver (for wire terminals)
•Phillips Screwdriver (for mounting screws)
If the GP-PWM-10-FM Controller was purchased with a
Go Power! Solar Power Kit, then UV resistant wire is
included. For instructions regarding the Go Power! Solar
Power Kit installation, please refer to the Installation
Guide provided with the Kit.
4.0 Choosing a Location
The GP-PWM-10-FM is designed to be mounted flush against a wall, out
of the way but easily visible.
The GP-PWM-10-FM should be:
•Mounted as close to the battery as possible
•Mounted on a vertical surface to optimize cooling of the unit
•Indoors, protected from the weather
In an RV, the most common controller location is above the refrigerator.
The wire from the solar array most commonly enters the RV through the
fridge vent on the roof or by using the Go Power! Cable Entry Plate (sold
separately) that allows installers to run wires through any part of the roof.
PV connections should connect directly to the controller. Positive and
negative battery connections must connect directly from the controller to
the batteries. Use of a positive or negative distribution bus is allowed
between the controller and battery as long as it is properly sized,
electrically safe and an adequate wire size is maintained.

GP-PWM-10-FM
9
© 2018 Go Power!
5.0 Installation Instructions
1. Prepare for mounting. Use the template provided on page 27
to mark the four mounting holes and the cutting line for flush
mounting your controller.
2. Complete the installation of the solar modules. If this
GP-PWM-10-FM was purchased as part of a Go Power! Solar
Power Kit, follow the Installation Guide provided. Otherwise,
follow manufacturer’s instructions for solar module mounting and
wiring.
Do not exceed
the GP-PWM-
10-FM Max
current ratings
The maximum current of the solar system is
the sum of parallel-connected PV module–
rated short circuit Currents (Isc) multiplied by
1.25. The resulting system current is not to
exceed 37.5A. If your solar system exceeds
this value, contact your dealer for a suitable
controller alternative.
Do not exceed
the GP-PWM-
10-FM Max
voltage ratings
The maximum voltage of the array is the sum
of the PV module–rated open-circuit voltage of
the series connected modules multiplied by
1.25 (or by a value from NEC 690.7 provided
in Table 690.7 A). The resulting voltage is not
to exceed 35V. If your solar system exceeds
this value, contact your dealer for a suitable
controller alternative.
Ne dépassez
pas le courant
nominal
maximum du
GP-PWM-10-FM
Le courant maximum du système solaire est la
somme des courants de court-circuit (Isc) des
modules PV connectés en parallèle, multipliée
par 1,25. Le courant du système qui en résulte
ne doit pas excéder 12,5 A. Si votre système
solaire dépasse cette valeur, veuillez contacter
votre revendeur pour obtenir un régulateur plus
approprié.
Ne dépassez
pas la tension
nominale
maximum du
GP-PWM-10-FM
La tension maximum des panneaux est la
somme de la tension à vide du module PV des
modules connectés en série, multipliée par
1,25 (ou par une valeur de l’article 690.7 du
Code National Électrique fournie dans le
tableau 690.7 A). La tension qui en résulte ne
doit pas excéder 35 V. Si votre système solaire
dépasse cette valeur, veuillez contacter votre
revendeur pour obtenir un régulateur plus
approprié.

GP-PWM-10-FM
10
© 2018 Go Power!
3. Select wire type and gauge. If this GP-PWM-10-FM was
purchased as part of a Go Power! Solar Power Kit, appropriate
wire type, gauge, and length is provided. Please continue to
Section 6, “Operating Instructions.” If the GP-PWM-10-FM was
purchased separately, follow the instructions included here.
Wire type is recommended to be a stranded copper UV-resistant wire.
Wire fatigue and the likelihood of a loose connection are greatly reduced
in stranded wire compared to solid wire. Wire gauge should be able to
sustain rated current and minimize voltage drop.
Wire Strip Length
Strip wires to a length of approximately 3/8 in (9 mm, as per strip gauge).
Suggested Minimum Wire Gauge
(Cable length 25 ft. max. from solar array to battery bank)
80-Watt Solar Module
#10 Wire Gauge
100-Watt Solar Module
#10 Wire Gauge
160-Watt Solar Module
#10 Wire Gauge
170-Watt Solar Module
#10 Wire Gauge
190-Watt Solar Module
#10 Wire Gauge
IMPORTANT: Identify the polarity (positive and negative) on the cable
used for the battery and solar module. Use colored wires or mark the
wire ends with tags. Although the GP-PWM-10-FM is protected, a
reverse polarity contact may damage the unit.
Wiring the GP-PWM-10-FM.Wire the GP-PWM-10-FM according to the
wiring schematic in Section 6. Run wires from the solar array and the
batteries to the location of the GP-PWM-10-FM. Keep the solar array
covered with an opaque material until all wiring is completed.
IMPORTANT: All wiring must be in accordance to National Electrical
Code, ANSI/NFPA 70. Always use appropriate circuit protection on any
conductor attached to a battery.
4. Connect the battery wiring to the controller first and then
connect the battery wiring to the battery.

GP-PWM-10-FM
11
© 2018 Go Power!
5. Torque all terminal screws per the following:
Stranded Copper 90°C Wire
Wire Size AWG
Rated Torque (in-lbs)
14
20
12
20
10
20
With battery power attached, the controller should power up and display
information. Connect the solar wiring to the controller and remove the
opaque material from the solar array. The negative solar array and
battery wiring must be connected directly to the controller for proper
operation. Do not connect the negative solar array or negative battery
controller wiring to the chassis of the vehicle.
6. Mounting the GP-PWM-10-FM.Mount the GP-PWM-10-FM to
the wall using the included four mounting screws.
IMPORTANT: You must set the battery type on the GP-PWM-10-FM
before you begin to use the controller (follow steps in Section 7). The
default battery setting is for AGM/LiFePO4batteries.
Congratulations, your GP-PWM-10-FM should now be operational. If the
battery power is low and the solar array is producing power, your battery
should begin to charge.
7. Re-torque: After 30 days of operation, re-torque all terminal
screws to ensure the wires are properly secured to the controller.
WARNING: This unit is not provided with a GFDI device. This
charge controller must be used with an external GFDI device as
required by Article 690 of the National Electric Code for the
installation location.

GP-PWM-10-FM
12
© 2018 Go Power!
6.0 Wiring Diagram
IMPORTANT: This diagram is valid only for version 1.5 and newer.
Version 1.4 and older have different terminal locations.
The GP-PWM-10-FM Maximum 12.5A rating is based on a 10 amp total
maximum short circuit current rating (Isc) from the parallel solar modules
nameplate ratings. The National Electric Code specifies the PV
equipment/system rating to be 125% of the maximum Isc from the PV
module nameplate ratings (1.25 times 10 = 12.5A). Use the wiring
diagram (below) to connect your battery to the battery terminals on the
solar controller. First, connect the battery to the controller, and then
connect the solar panel to the controller.
The fuse or breaker used should be no larger than 15 amps.
The controller will not work unless there is a battery
connected to the battery terminals with at least 9V.
WARNING: When the photovoltaic (solar) array is exposed to
light, it supplies a dc voltage to this equipment

GP-PWM-10-FM
13
© 2018 Go Power!
7.0 Operating Instructions
7.1 Power Up
When the GP-PWM-10-FM is connected to the battery, the controller will
go into Power Up mode.
Icons Displayed: All segments of the numerical display; backlight blinks.
Depending on the battery voltage when the GP-PWM-10-FM Power Up
occurs, the controller may do a Boost Charge or quickly go into Float
Charge. The Charging Profile selected will commence the following day
after a Power Up (refer to the Charging Profile Chart on page 11 for
more details).
7.2 Setting the Battery Charging Profile
To select the battery
charging profile,
press and hold the B
Button. This will
cause the current
battery type to flash.
Then, press the B
Button to toggle
through the profile
options: Sealed/Gel,
AGM/LiFePO4or
Flooded.
To confirm the battery profile, press and hold the A Button for 3
seconds.
Non-volatile memory: Any settings made on the GP-PWM-10-FM will
be saved even when the power has been disconnected from the
controller.
Refer to the Battery Charge Profile Chart below for details on each
profile.

GP-PWM-10-FM
14
© 2018 Go Power!
7.3 Battery Charging Profile Chart
If PV power is insufficient or too many loads are drawing
power from the battery, the controller will not be able to
charge the battery to the target charging voltage.
Auto Equalize: The GP-PWM-10-FM has an automatic equalize feature
that will charge and recondition your batteries at least once a month at a
higher voltage to ensure that any excess sulfation is removed.
This mode should not be entered unless you are using a
flooded battery.
7.4 Viewing the Controller Display Information
To toggle between Battery Voltage, PV Charging Current, Battery State
of Charge (SOC), and ampere hours charged since last reset, press the
B Button.
Battery Type
SEALED
/GEL AGM FLOODED LFP
Float Charge @ 25°C:
13.7V (+/- 0.1V)
N/A
Bulk/Absorption Charge @ 25°C:
Set to 30 minutes every morning.
Applied for 2 hours if the battery
voltage drops below 12.3 volts.
14.1V
(+/- 0.1V)
14.4V
(+/-
0.1V)
14.4V
(+/- 0.1V) N/A
Equalization Charge @ 25°C:
Applied for 2 hours every 28 days
and if the battery voltage drops
below 12.1 volts.
N/A N/A 14.9
V
(+/-0.1V) N/A
Absorption Charge voltage for
LiFePO4:
Set to 30 minutes every morning N/A 14.4VDC
Float Charge voltage for LiFePO4:
N/A
14.0VDC
If a charging cycle is unable to complete in a single day, it will continue the following day. The
terms SEALED/GEL, AGM, FLOODED and LFP are generic battery designations. Choose the
charging profile that works best with your battery manufacturer’s recommendations.

GP-PWM-10-FM
15
© 2018 Go Power!
Push the B
Button to show
the battery
voltage.
Icons Displayed:
Battery SOC, Volt
Symbol (V)
Push the B
Button to show
the PV charging
current.
Icons
Displayed:
Ampere Symbol
(A), Battery SOC
Push the B
Button to show
the battery state
of charge (shown
as a
percentage).
Icons
Displayed:
Battery SOC,
Percent Symbol
(%)

GP-PWM-10-FM
16
© 2018 Go Power!
A value of 100% will only be displayed after a Boost or Equalize charge
completes.
Push the B
Button to show
the number of
amp hours
charged since the
last reset.
Icons Displayed:
Amp hours
charged, Amp
hour symbol (Ah)
or kiloamp hour
symbol (kAh)
7.5 Resetting the ampere hours charged
To reset the
count of ampere
hours charged,
toggle to the
ampere hours
charged. Press
and hold the A
Button for 6
seconds to reset
the counter to
zero.

GP-PWM-10-FM
17
© 2018 Go Power!
7.6 Errors
Over Voltage
If the GP-PWM-
10-FM
experiences a
battery over
voltage (15.5V),
the controller will
stop operating,
and the display
will begin to flash
with all icons. The
controller will
resume operating
when the error is
cleared.
Icons Displayed: All symbols
Low Voltage
If the battery
voltage reaches
11 volts, the
battery SOC
symbol will show
the text “LOW”
beneath it. The
controller will
continue
operating in this
condition and will
only stop
operating if the
voltage drops
below 9 volts.
Icons Displayed: Battery SOC Symbol, LOW

GP-PWM-10-FM
18
© 2018 Go Power!
8.0 Display Symbols
Symbol
Indicator For:
Day Time: PV Charge Current
Night Time
Battery Voltage
Battery State of Charge
SEALED
Sealed/Gel
AGM
AGM/LFP
FLOODED
Flooded
Other Symbols
USB charger on
(When charger is off, no symbol will show)
LOW
Battery voltage is lower than
11.0 VDC
Whole display will start to blink Battery voltage > 15.5 VDC
Battery State of Charge
Symbol
Battery Voltage
Shows only after full Boost
or Equalization Cycle
>= 12.6 VDC
>= 11.8 -12.6 VDC
> 11.0 -11.8 VDC

GP-PWM-10-FM
19
© 2018 Go Power!
<= 11.0 VDC
100%
Shows only after full Boost
or Equalization Cycle
90% >= 12.8 VDC
 =   −11.0
1.8∗90%
<12.8 VDC and > 11.0
VDC
0% <= 11.0 VDC
9.0 USB Charging
The GP-PWM-10-FM offers a standard USB connector for delivering 5.0
VDC to small mobile appliances such as cell phones, tablets or small
music players. This charging port is capable of supplying up to 1500 mA
of current.
Remove the rubber cover of the USB terminal to access the terminal.
The USB charging port is always active when the USB symbol appears
on the display.
The controller disables the USB charger automatically if the battery
voltage drops below 11.0 VDC. If there is enough current from the PV
panel/array available to charge the Battery to above 12.8 VDC, the USB
terminal will be enabled again.
WARNING: Do not connect the charging device anywhere else! USB-
Negative contact is connected to battery negative.
10.0 Frequently Asked Questions (FAQs)
Before a problem is suspected with the system, read this section. There
are numerous events that may appear as problems but are in fact
perfectly normal. Please visit gpelectric.com for the most up-to-date
FAQs.

GP-PWM-10-FM
20
© 2018 Go Power!
It seems like my flooded batteries are losing water over time.
Flooded batteries may need to have distilled water added periodically to
replace fluid loss during charging. Excessive water loss during a short
period of time indicates the possibility of overcharging or aging batteries.
When charging, my flooded batteries are emitting gas.
During charging, hydrogen gas is generated within the battery. The gas
bubbles stir the battery acid, allowing it to receive a fuller state of charge.
Important: Ensure batteries are in a well-ventilated space.
My voltmeter shows a different reading than the GP-PWM-10-FM
display.
The meter value on the GP-PWM-10-FM display is an approximate
reading intended for indication purposes only. There is an approximate
0.1 volt inherent error present that may be accentuated when compared
with readings from another voltmeter.
There may be a slight difference between the battery voltage displayed
on the GP-PWM-10-FM display and the battery voltage measured at the
battery terminals. When troubleshooting using a voltmeter, check both
the battery voltage at the GP-PWM-10-FM controller terminals and
battery voltage at the battery terminals. If a difference of more than 0.5
volts is noted, this indicates a large voltage drop possibly caused by
loose connections, long wire runs, small wire gauge, faulty wiring, a
faulty voltmeter, or all the above. Consult the Suggested Minimum Wire
Gauge chart in Section 5 for wiring suggestions and check all
connections.
What causes a warning signal and when are the warnings
triggered?
Connection
Warning
Notes
LCD
Battery
reverse
polarity
“POL” on LCD
and constant
audible alarm
PV reverse
polarity
“POL” on LCD
and constant
audible alarm
Battery must be
connected with
correct polarity