MLT Inverters Oasis 436 User manual

+
OASIS
User Manual

© 2016 MLT Inverters
4th Edition – April 2016
OASIS USER MANUAL PAGE 1

Oasis Series User Manual
Table of Contents
1. Introduction .......................................................................................................................... 6
1.1 Warnings and Cautions................................................................................................ 6
1.2 Contacting MLT Inverters ............................................................................................ 7
1.2.1 Product Support................................................................................................... 7
1.2.2 Contact Details..................................................................................................... 7
1.2.3 Telephone ............................................................................................................ 7
1.3 System Specifications................................................................................................... 8
1.3.1System Ratings..................................................................................................... 8
1.3.2 AC Input................................................................................................................ 8
1.3.3 DC Specifications.................................................................................................. 8
Connectors ..................................................................................................................... 8
1.3.4 Efficiency .............................................................................................................. 9
1.3.5 General Specifications ......................................................................................... 9
1.3.6 Climatic Conditions.............................................................................................. 9
1.3.7Operator Panel .................................................................................................... 9
1.3.8 Altitude Derating ............................................................................................... 10
1.4 System Description .................................................................................................... 11
1.4.1 Typical Off-grid or Self Consumption Application............................................ 11
1.4.2 Typical Grid-tied Application............................................................................. 11
1.4.3 Basic Generator or Load Control ...................................................................... 11
2. Advanced Features .............................................................................................................13
2.1Battery Cycling............................................................................................................13
2.2 Auxiliary Relay control ............................................................................................... 13
2.2.1 Battery Critical ................................................................................................... 13
2.2.2 High Load ...........................................................................................................13
2.2.3 Overload.............................................................................................................13
PAGE 2OASIS USER MANUAL

2.3 Load Sense.................................................................................................................. 14
2.4 MLT Bridge Communications (Optional Add-on) ..................................................... 14
3. Mounting and Electrical Connections ...............................................................................15
3.1 Installing the Oasis inverter ....................................................................................... 15
3.1.1 Selecting a suitable location..............................................................................15
3.1.2 Mounting ........................................................................................................... 15
3.1.3 Making the electrical connections....................................................................16
3.1.4 Battery Bank Size ...............................................................................................18
3.1.5 Powering up the Oasis....................................................................................... 18
3.1.6 Powering down the Oasis ................................................................................. 19
4. Inverter Operation Indicators............................................................................................21
4.1 Inverter Status ............................................................................................................21
4.2 Battery Status ............................................................................................................. 21
4.3 Source Status..............................................................................................................21
4.4 Load Status ................................................................................................................. 21
4.5 Special Combinations.................................................................................................21
5. Interface ..............................................................................................................................22
5.1 On/Off Button ............................................................................................................ 22
5.2 System Icons............................................................................................................... 22
5.3 Dashboard .................................................................................................................. 22
5.4 Control Panel .............................................................................................................. 23
5.5 Graphing and Logs...................................................................................................... 24
5.5.1 Source Graphs....................................................................................................24
5.5.2 Load Graphs ....................................................................................................... 25
5.5.3 Battery Graphs................................................................................................... 25
5.5.4 Event logs ........................................................................................................... 26
5.5.5 Production Logs .................................................................................................28
5.6 Settings ....................................................................................................................... 29
5.6.1 Settings Menu....................................................................................................29
OASIS USER MANUAL PAGE 3

5.6.2 Setup Alarms......................................................................................................30
5.6.3 Date & Time .......................................................................................................31
5.6.4 Relay Control...................................................................................................... 32
5.6.5 Battery Cycle...................................................................................................... 33
5.6.6 Battery Setup .....................................................................................................34
6. Configuration ......................................................................................................................37
6.1 DIP Switch configuration............................................................................................37
6.2 Connecting an external AC source ............................................................................ 37
6.2.1 Preparation ........................................................................................................37
6.2.2 Installing a Source.............................................................................................. 37
7. Configuration Switches ......................................................................................................38
7.1 DIP Switch Table......................................................................................................... 38
7.1.1 Description of DIP functionality ........................................................................ 38
8. Grid-tied Inverters ..............................................................................................................41
8.1 General .......................................................................................................................41
9. About Batteries...................................................................................................................42
9.1 General ....................................................................................................................... 42
9.1.1 Sealed Lead-Acid Batteries................................................................................ 42
9.1.2 Deep Cycle Lead-Acid Batteries ........................................................................ 42
9.1.3 Lithium Batteries................................................................................................42
9.2 Battery Bank Location................................................................................................ 42
9.3Maintenance .............................................................................................................. 42
9.4 Replacing a Battery .................................................................................................... 43
9.5 Lead-Acid Battery Charging ....................................................................................... 43
9.5.1 Charging Stages..................................................................................................43
9.5.2 Battery charger settings .................................................................................... 44
9.6 Lithium Battery Charging ........................................................................................... 45
9.6.1 Battery charger settings .................................................................................... 45
10. About Solar Panels..............................................................................................................46
PAGE 4OASIS USER MANUAL

10.1 Introduction................................................................................................................ 46
10.2 Using a Solar System with the Oasis..........................................................................46
10.3 Battery charger settings............................................................................................. 46
11. Trouble Shooting ................................................................................................................47
11.1 Faults........................................................................................................................... 47
11.2 Typical Problems ........................................................................................................ 47
11.2.1 My Oasis’ screen fails to respond or a does not appear to be working47
11.2.2 Why does the Oasis not connect to a running generator? ................... 47
11.2.3 Why does the generator connect and then immediately drop out?.... 48
11.2.4 Why didn’t I get the usual capacity from my storage batteries? ..........48
11.2.5 Why doesn’t my Oasis ‘wake up’ when I switch on a load?.................. 48
12. Glossary ...............................................................................................................................49
Appendix A: Single Line Wiring Diagram .....................................................................................50
Figures
Figure 1: De-rating the Oasis inverter output power at high altitude ........................................ 10
Figure 2: Identifying parts of the Oasis......................................................................................... 12
Figure 3: Wall mounting................................................................................................................ 16
Figure 4: AC Input/output Connections on the Oasis.................................................................. 18
Figure 5: DC cables ........................................................................................................................ 19
Figure 6: Oasis DC connections..................................................................................................... 20
OASIS USER MANUAL PAGE 5

1. Introduction
1.1 Warnings and Cautions
A safety instruction (message) includes a hazard alert symbol and a signal word, WARNING or
CAUTION. Each signal word has the following meaning:
HIGH VOLTAGE: This symbol indicates the presence of a high voltage. It calls your
attention to items or operations that could be dangerous to yourself or others
operating this equipment. Read the message and follow the instructions carefully.
WARNING: Indicates a potentially hazardous situation which, if not avoided, can result
in serious injury or death.
CAUTION: Indicates a potentially hazardous situation which, if not avoided, can result
in minor to moderate injury, or serious damage to the product. The situation
described in the CAUTION may, if not avoided, lead to serious results.
GENERAL WARNINGS
DANGER OF ELECTRIC SHOCK. There are no user serviceable parts inside the inverter. DO NOT attempt to make
repairs or alterations to the unit.
WARNING: This equipment should be installed, adjusted, and serviced by qualified electrical maintenance
personnel familiar with the construction and operation of the equipment and the hazards involved. Failure to
observe this precaution could result in personal injury.
GENERAL CAUTIONS
CAUTION: Always wear personal protective equipment (protective clothing, gloves, and safety boots) while
performing an installation or maintenance, to avoid the danger of injuries.
CAUTION: Proper grounds, disconnecting devices, e.g. bypass boxes and other safety devices and their location
are the responsibility of the user and are not provided by MLT Inverters.
CAUTION: Do not cover the device or store it in a small space - always keep it well ventilated and well away from
flammable gases or powders. Components in the device could potentially cause a small electric spark that could
ignite flammable gas or powders. Flammable gases are created by batteries and can become a hazard in poorly
ventilated spaces.
CAUTION: For indoor use only and MUST be installed in a dry area free from conductive liquids or conductive
debris. If part of the inverter becomes submerged in water look for a safe way to isolate it at the distribution
board and if possible at the batteries.
PAGE 6OASIS USER MANUAL

1.2 Contacting MLT Inverters
1.2.1 Product Support
When contacting Product Support via telephone, email or fax please provide the following information
for the fastest possible service:
Type of Inverter
Serial number
Battery type
Battery bank capacity
Battery bank voltage
A description of the event
Note that the serial number is available on the serial plate that is attached to the bottom of the machine
inside the cover.
1.2.2 Contact Details
Telephone: [phone]
Email: [e-mail]
Address: 103 Garfield Road
Kenilworth 7708
Cape Town
South Africa
1.2.3 Telephone
You can reach technical support by telephone directly Monday to Friday between 08h00 and 17h00
(GMT +2 hours). Queries outside of these hours should be directed to [e-mail] and
will be answered at the earliest opportunity. When contacting technical support, please ensure that
you have the information listed above available.
OASIS USER MANUAL PAGE 7

1.3 System Specifications
1.3.1 System Ratings
Oasis 436 / 448
Oasis 636 / 648
Rated Voltage / Frequency 1ø / 230 V / 50 Hz 1ø / 230 V / 50 Hz
Continuous Rated Output Power 4 kVA 6 kVA
Half-hour Rated Output Power 5 kVA 8 kVA
Rated Output Current 17 A (40 A with AC source) 26 A (60 A with AC source)
Maximum Output Current 22 A (for 30 mins), 34 A (for
2s), 40 A (with AC source)
35 A (for 30 mins), 52 A (for
2s), 60 A (with AC source)
THD V (at rated power) < 5 % < 5 %
Protection Surge, Overload, Short circuit, Over temperature, Reverse
power, Low / High battery voltage, Source over/under
voltage/frequency
Changeover time Less than 30ms changeover time after source failure.
1.3.2 AC Input
Input Voltage Range 185 .. 250 V 185 .. 250 V
Input Frequency Range 42 .. 65 Hz 42 .. 65 Hz
Rated Input Current 40 A 60 A
1.3.3 DC Specifications
Battery Voltage (Nom.) 36 / 48 V 36 / 48 V
Charging Voltage 42.3 / 44.1 V (36 V) and 56.4 / 58.8 V (48 V)
Max. Charging Current 25 / 50 A (36 V) & 20 / 40 A (48 V) 30 / 60 A (36 V) & 25 / 50 A (48 V)
Battery Technology Lead-Acid, Li-Ion
(Contact MLT Inverters for details on supported Batteries)
Connectors
DC Input 10 x 35 mm² Lugs 10 x 50 mm² Lugs
Rated Output Power 10 mm² Terminal Block 16 mm² Terminal Block
PAGE 8OASIS USER MANUAL

1.3.4 Efficiency
Oasis 436 / 448
Oasis 636 / 648
Efficiency Up to 94 % Up to 94 %
No Load Power Consumption (On) < 35 W < 40 W
No Load Power Consumption
(Load Sense)
6 W 6 W
1.3.5 General Specifications
Mounting Method Wall Mounted
Dimensions (W x H x D) 355 x 580 x 210 mm 380 x 700 x 210 mm
IP/NEMA Rating IP20 / NEMA1 IP20 / NEMA1
Colour RAL9002 / RAL9011 RAL9002 / RAL9011
Weight 43 kg 62.5 kg
Architecture Galvanically Isolated, Forced Air Cooling
1.3.6 Climatic Conditions
Ambient Temperature -5 .. 45 °C
Ambient Transport Temperature
-25 .. 70 °C
Maximum Ambient for Rated Power 40 °C
Relative Humidity (Non-Condensing) 5 .. 85 %
Maximum Altitude for Rated Power 1000 m above sea level
(Power derated for High Altitude)
1.3.7 Operator Panel
Display Type Full Colour Touch Screen 4.3” LCD; 24h logs of source
power, load power, battery state of charge and Events
All specifications listed above performed at nominal voltage, frequency and temperature unless
otherwise noted.
OASIS USER MANUAL PAGE 9