SynQor MINV-4000-1U-28 Series Manual

1.888.567.9596 (USA only) |SynQor Headquarters 155 Swanson Road, Boxborough, MA 01719-1316 USA |www.synqor.com
Made in USA
Military Grade Power inverter
MINV-4000-1U-28
N+M Redundancy
(optional)
Operator’s Guide
MINV-4000-1U-28 Series

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Table of Contents
Section I Warnings
Hazardous Voltages ...................................................................................................................................................4
Hazardous Energies...................................................................................................................................................4
Protection from the Environment .........................................................................................................................5
User Serviceable Parts...............................................................................................................................................5
Section II General Product Information
Product Description ...................................................................................................................................................6
Product Topology ........................................................................................................................................................7
Part Numbering Scheme and Options ................................................................................................................9
Product Specifications............................................................................................................................................ 10
Technical Specifications........................................................................................................................................ 11
1U Mechanical Diagram....................................................................................................................................... 12
MINV Efficiency........................................................................................................................................................ 13
Total Output Power that can be derived from the DC INPUT................................................................. 13
Power Cable Wiring Diagram ............................................................................................................................. 14
Power Cable Wiring Size ....................................................................................................................................... 15
Section III Operation
Set-Up ........................................................................................................................................................................... 16
Start-Up ....................................................................................................................................................................... 16
Shut-Down .................................................................................................................................................................. 16
Power Cable Connections...................................................................................................................................... 17
Cooling System .......................................................................................................................................................... 17
Front Panel Indicators ........................................................................................................................................... 18
Audible alarm ................................................................................................................................................... 20
Operating Environment......................................................................................................................................... 21

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Section IV Multiple Unit Configuration
General Considerations ......................................................................................................................................... 22
Expanded Paralleling -F Option ........................................................................................................................ 23
Redundant Paralleling -R Option ...................................................................................................................... 24
Possible configurations of the AC OUTPUTs.................................................................................................. 25
Multi-unit Configurations............................................................................................................................. 25
Parallel Connection of the AC Outputs ............................................................................................................ 26
Two MINV units with AC OUTPUTs Paralleled................................................................................... 26
Three MINV units with AC OUTPUTs Paralleled................................................................................ 27
Series Split-Phase Connection of AC Outputs .............................................................................................. 28
Series 3-Phase Connection of AC Outputs ..................................................................................................... 29
Parallel Configurations of the AC OUTPUTS: Up to 32 Units.................................................................. 30
Connection of the DC INPUTS ........................................................................................................................... 32
Multi-Unit AC OUTPUT On/Off Control – Expanded/Redundant Parallel (-F/-R option). 32
AC OUTPUT Neutral Grounding............................................................................................................... 32
Wiring Caution ........................................................................................................................................................ 32
Section V Control Interface Details
Control Cable Connections................................................................................................................................... 33
Internal User I/O Circuits............................................................................................................................. 34
Remote On/Off Switch Connections ......................................................................................................... 34
Digital Input/Output Control Signals............................................................................................................... 35
RS232 Serial Interface............................................................................................................................................ 36
Ethernet Interface.................................................................................................................................................... 37
Synchronized Operation of Multiple Units ..................................................................................................... 38
Turn-On, Turn-Off, Restart Control:......................................................................................................... 38
Sleep Mode.................................................................................................................................................................. 39
Section VI Maintenance
Fans ............................................................................................................................................................................... 40
Cleaning....................................................................................................................................................................... 41
Section VII Trouble-Shooting Guide
Fault Conditions ....................................................................................................................................................... 42

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Section I Warnings
Hazardous Voltages
The INPUT AND OUTPUT POWER connectors and cables of the SynQor MINV may have voltages
that are unsafe. INJURY OR DEATH ON CONTACT may result. Appropriate safety precauons
should be taken. All connecons should be made in accordance with LOCAL ELECTRICAL CODES.
• The MINV CHASSIS should be connected to earth or system ground with Ground Stud on the
rear panel, see mechanical diagrams.
• For the DC INPUT cable and connector:
▪ The rated DC input voltage of the MINV is below the level considered hazardous.
▪ The DC input terminals of the MINV are isolated from the AC output with reinforced safety
insulaon.
▪ However, never assume the terminals of the DC input connector or the wires of the DC input
cable are safe to contact, even if the MINV appears to be o.
• For the AC OUTPUT cable and connector:
▪ Do not assume that a hazardous voltage is not present at the terminals of the AC output
connector, even if the MINV appears to be o.
▪ Do not make contact with the terminals of the AC output connector.
▪ Connect the AC output cable to the MINV before the MINV is turned on.
▪ If connecon of the load to the AC output cable has exposed conductors, make this connecon
before connecng the AC output cable to the MINV.
▪ Connecons between the AC output cable and the AC load should not be accessible.
Hazardous Energies
The INPUT AND OUTPUT POWER connectors and cables of the SynQor MINV may be the source
of high levels of energy. Do not inappropriately make electrical contact between any terminal of
a connector and another, or between any wire of a cable and another, or between any terminal
or wire and the MINV’s chassis or ground. DAMAGING ELECTRICAL ARCS may result. Care should
be taken to avoid accidental electrical contacts of this sort.

Section I Warnings
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Protecon from the Environment
The SynQor MINV is a ruggedly built product having its electronics contained in a sealed chamber.
It is capable of withstanding harsh levels of mechanical acceleraon, shock and vibraon,
temperature and pressure variaons, and exposure to water, salt, sand and dust within the levels
specied in the data sheet. THESE LEVELS SHOULD NOT BE EXCEEDED.
Do not obstruct the air intake in the front of the MINV or the fan exhausts in the rear panel of
the MINV while the MINV is operang.
User Serviceable Parts
The MINV fans are user replaceable with kits available from SynQor. Please contact the SynQor
factory for obtaining fan replacement kits and instrucons (Counter-Rotang Replaceable
Fan Module SYN-9452). The SynQor MINV has no other user serviceable parts inside of it. DO
NOT REMOVE the cover of the MINV or any of its connectors. Other than the fan assembly
replacement, only factory trained personnel should perform repairs.

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Section II General Product Information
Product Descripon
SynQor’s Military Inverter units are designed for the extreme environmental and demanding
electrical condions of Military/Aerospace applicaons. SynQor’s MINV incorporates eld
proven high eciency designs and rugged packaging technologies. This MINV will accept a DC
input voltage while delivering a well-condioned connuous 4000 W, AC output to the load. It
is designed and manufactured in SynQor’s USA facilies to comply with a wide range of military
standards. Opons include a selecon of output voltage amplitudes, frequencies, and an
electronic breaker on the AC output to permit fault-tolerant parallel operaon for higher power
and/or N+M redundant systems.
A communicaon/control port is available to permit monitoring and control by a host computer
system. Front panel LEDs provide informaon on the status of the MINV.
The electronic circuitry within the MINV-4000 Series products is designed, qualied and
screened according to SynQor’s MIL-COTS Standards. It complies with the requirements of
MIL-STD-704F, MIL-STD-1399-300B, MIL-STD-1275D and MIL-STD-461F, as well as IEC-EN61000
specicaons for world-wide commercial ulity applicaons.
The MINV-4000 Series products are designed and manufactured to withstand the harsh
environments and use encountered in military applicaons. The electronic circuitry is contained
in a sealed chamber constructed from a die-cast aluminum chassis that is weather-proof and
shock-proof. Redundant, water-proof fans on the rear panel draw cooling air over the heat-sink
ns below the sealed chamber. Military-grade circular connectors are used, and oponal aached
connector covers are available for when the cables are not aached. The MINV-4000 Series products
comply with a wide range of tesng according to MIL-STD-810G.
The SynQor MINV-4000 Series products are designed and manufactured in the U.S.A.

Section II General Product Information
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Product Topology
The SynQor MINV-4000 Series products use an isolated topology that provides protecon to the
load from spikes, noise, surges, brownouts, blackouts, etc. in the input power sources. They also
provide smoothing of load transients and nonlinear load proles so that the input power source
is not subjected to these disturbances.
EMI lters are present at all external inputs and outputs.
Power ows from the DC INPUT through an isolated DC-DC converter. The AC OUTPUT is created
by an inverter that draws power from the mid-bus. The inverter provides high-frequency safety
isolaon and a pure-sinusoidal output voltage waveform. An oponal electronic breaker can be
added to the AC OUTPUT. This one pole hot side only electronic breaker allows for fault-tolerant,
glitch-free operaon when several MINV units are placed in parallel.
Bulk energy storage capacitors are connected to the mid-bus to help smooth imbalances in
power ow between the inputs and outputs of the MINV.
There is a communicaon/control port that provides a digital interface to a host computer system.

Section II General Product Information
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* Single-Pole Electronic Breaker installed on all
AC output lter modules when ordering“R” option
DC
Input
AC
Output
Energy
Storage
Capacitor
Energy
Storage
Capacitor
Energy
Storage
Capacitor
Single-Pole
Electronic
Breaker*
Single-Pole
Electronic
Breaker*
Single-Pole
Electronic
Breaker*
AC
Filter
AC
Filter
AC
Filter
InverterInverter Inverter
Isolated
DC-DC
Converter
Isolated
DC-DC
Converter
Isolated
DC-DC
Converter
Electronic
Switch
Electronic
Switch
Electronic
Switch
DC
Filter
DC
Filter
DC
Filter

Section II General Product Information
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Part Numbering Scheme and Opons
This table shows the part numbering scheme for the full line of SynQor MINV products:
Base Models
Model Number Power Nominal DC Input Voltage Height (W x D x H) Weight
MINV-4000-1U 4000 W 5000 VA 28 V 1U (17.00” x 22.43” x 1.73”) 32 lbs.
Base Models
Options Options
DC Input
Voltage
AC
Output
Voltage
AC
Output
Neutral
Wire
AC
Output
Set Point
Freq
Output
Cong
Additional
Options
DC Input
Voltage 28 20 - 33 V
AC Output
Voltage
1
2
115 Vrms
230 Vrms
28 1
2
G 5
-E 00
CE
MINV-4000-1U- F 6 S AC Output
Neutral
Wire
GGrounded
R 4 FFloating*
RAC Output Electronic Breaker*
Not all combinations make valid part numbers, please contact SynQor for availability. AC Output
Set Point
Freq
5
6
4
50 Hz
60 Hz
400 Hz
See the Product Summary web page for more options.
*Notes:
Order “F: Floating” option when conguring the AC output for multi-unit combinations Output
Cong SSingle-Phase Output
of up to 3 units.
Order “R: AC Output Electronic Breaker” option for fault-tolerant, Additional
Options
-E Ethernet/SNMP with Conguration Loading
glitch-free parallel systems of up to 32 units with N+M redundancy. 00 No CE Marking
The AC output neutral wire will not be connected to the chassis. CE CE Marking
Requires Ethernet / SNMP Option.
Examples:
MINV-4000-1U-28-1G6S-E00
MINV-4000-1U-28-2G5S-ECE (230 V output with CE marking)
The MINV-4000 Series of products provide up to 4000 W of total AC output power.
• A 1U high, 32 lbs. rackmount unit.
Each format has various opons that can be specied according to the part numbering scheme
shown in the table:
• The AC OUTPUT voltage of the MINV-4000 series can be 115 Vrms or 230 Vrms.
• The AC OUTPUT can be congured with its neutral wire intenonally grounded to the chassis of
the MINV or le oang for shipboard or paralleling applicaons of up to 32 units.
• The inial set-point frequency of the AC OUTPUT voltage can be 50 Hz, 60 Hz, or 400 Hz. Regardless
of the inial set-point frequency, the actual frequency can be set through the communicaons/
control port.
• The Electronic Breaker opon adds fault-tolerant, glitch-free mul-unit operaon for N+1 or
N+M redundancy up to 32 units. This opon allows up to 32 units total in Single Phase, Split
Phase, or 3-Phase systems.
• RS232 serial port and logic-level I/O communicaon are included in the standard model. An
Ethernet port provides web and SNMP interfaces.

Section II General Product Information
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Product Specicaons
The following three pages show the electrical and mechanical specicaons of the
MINV-4000-1U-28 high Series of products. Data sheets showing these specicaons and other
informaon can be found at the web site http://www.synqor.com/MINV.
MINV-4000-1U-28 Front Panel
On/Off
Switch
AC
Output
Fan
Exhaust
Ground Stud
(1/4-20)
Fan
Exhaust
DC Input
Status Indication Panel
1.73"
1U
17.00"
MINV-4000-1U-28 Rear Panel
Air intake
User
I/O
CONFIG
Port
Ethernet
Port

Section II General Product Information
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Technical Specicaons
DC INPUT CHARACTERISTICS
Steady State Operating Voltage 20 - 33 V
Continuous Maximum Input Current 240 A (full load, 20 V)
Transient Operating Voltage 18 - 40 V (500ms @ 18 V)
Transient Maximum Input Current 275 A
AC OUTPUT CHARACTERISTICS
Total Output Power Continuous 4000 W (5000 VA)
AC Output Waveform Pure Sinusoidal
Voltage Line-Neutral 115 Vrms ± 3%
230 Vrms ± 3%
Frequency 60 Hz ± 0.5%
50 Hz ± 0.5%
400 Hz ± 0.5%
Load Power Factor 0-1.0 (leading or lagging)
Total Harmonic Distortion 2% (3000 W resistive load)
Single-Phase Output
Steady State Load Current 43.5 Arms (115 Vrms)
21.7 Arms (230 Vrms)
Peak Load Current 78 Apk (115 Vrms)
39 Apk (230 Vrms)
Specications subject to change without notice.
* Regarding MIL-STD-461 CE-101, the 50 uH series inductance of a standard LISN
adversely affects the input ripple of the MINV. Such a large series
source inductance (50 uH in each power lead) is not generally encountered in a
28 V DC source of such high power rating. Therefore, testing for CE-101 (DC input)
was conducted with 3 different congurations: two using 50 uH LISNs and a 54 mF
capacitor connected across the input to the MINV, and one using 5 uH LISNs for
which no additional capacitor was added.
These congurations all passed CE-101 for all frequencies.
ENVIRONMENTAL CHARACTERISTICS MIL-STD-810G
Temperature Methods 501.5, 502.5
Operating Temperature
Full Rated Power -40 °C — +55 °C
Reduced Power per Figure B -40 °C — +70 °C
Storage Temperature -40 °C — +70 °C
Altitude Method 500.5
Operating 0 - 18,000 ft
Non-operating 0 - 40,000 ft
Environmental Tests
Shock/Drop Method 516.6, Procedures 1,4,6
Temperature Shock Method 503.5, Procedure 1
Vibration Method 514.6, CAT 5, 7, 8, 9, 24
Fungus Method 508.6
Salt Fog Method 509.5
Sand and Dust Method 510.5, Procedures 1,2
Rain Method 506.5 Procedure 1
Humidity Method 507.5 Procedure 2
Mechanical Vibrations of Method 528 Procedure 1
Shipboard Equipment
RELIABILITY CHARACTERISTICS MIL-HDBK-217F
MTBF 468 kHrs MIL-217F Ground Benign, Ta=25 °C
ELECTROMAGNETIC CAPABILITY MIL-STD-461F
CE101* 30 Hz - 10 kHz
CE102 10 kHz - 10 MHz
CS101 30 Hz - 150 kHz
CS106 10 kHz - 40 GHz
CS114 10 kHz - 200 MHz
CS116 10 kHz - 100 MHz
RE101 30 Hz - 100 kHz
RE102 10 kHz - 18 GHz
RS101 30 Hz - 100 kHz
RS103 2 MHz - 40 GHz
MECHANICAL CHARACTERISTICS
1U Standard Chassis
Chassis Size (W x D x H) 17.00 ”W x 22.43 ”D x 1.73 “(1U)H
Case Material Aluminum
Total Weight 32 lbs.
DC Input Connectors
DC (-) Input Connector CGE2E18H5ZWB-16
DC (+) Input Connector CGE2E18H5ZNB-16
AC Output Connectors
115 V Single Phase CB2-20-19SXS
230 V Single Phase CB2-20-19SXS
I/O Ports
User I/O Ports HD DB15 Female
Conguration I/O Port HD DB15 Male
Ethernet Port Amphenol RJF22N00, Code B
Cooling Exhaust Fans
Sound Pressure Level (SPL) 64 dB(A)
Air Flow 0.92 (m3/min) 32.5 CFM
Two fans in system, above specs are for each fan separately.
MINV in Transit Case Option

Section II General Product Information
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1U Mechanical Diagram
MADE IN U S A
MINV
MILITARY
INVERTER
ФAФBФC
POWER OUT LOAD
COM REM BATTLE
FAN
TEMP
POWER IN
®
17.00″
[431.8]
18.700″
[474.98]
0.750″
[19.05]
0.75″
[19.1]
1.49″
[37.8]
22.43″
[569.6]
21.34″
[542.1]
1.73″
[43.9]
0.312″
[7.92] 0.624″
[15.85]
9.750″
[247.65]
19.450″
[494.03]
0.55″
[13.9]
UNIT
MOUNTING
HOLES
8-32 .250
x26

Section II General Product Information
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MINV Eciency
Figure 1 shows the typical eciency with which the MINV-4000 series power supplies delivers
power to its AC OUTPUT from a 22 V DC INPUT, 28 V DC INPUT, and 33 V DC INPUT:
74%
76%
78%
80%
82%
84%
86%
88%
90%
92%
500 1000 1500 2000 2500 3000 3500 4000
Efficiency
AC Output Power (W)
22 V Input
28 V Input
33 V Input
Figure 1
Total Output Power that can be derived from the DC INPUT
The total MINV output power for the MINV-4000 series is rated at 4000 W for an ambient
temperature as high as 55 oC (131 oF).
The maximum steady-state output power as a funcon of ambient air temperature and DC input
voltage is shown below in Figure 2.
0
500
1000
1500
2000
2500
3000
3500
4000
4500
40 45 50 55 60 65 70 75
AC Output Power (W)
Ambient Temperature (°C)
Vin ≥ 22 Vdc
Vin < 22 Vdc
Figure 2

Section II General Product Information
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Power Cable Wiring Diagram
Looking at the rear panel, the MINV connector terminals have the following funcons and locaons:
AC OUTPUT
Pin Funcon
A Line
B Neutral
C Ground A
BC
DC INPUT
Key Funcon
A -V
A
DC INPUT
Key Funcon
B +V
B

Section II General Product Information
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Power Cable Wiring Size
SynQor recommends the following cables for use with the MINV-4000 series:
AC Output: SYN-9630 MINV connecon to hardwire terminaon, 10’
DC Input: SYN-9651 MINV posive connecon to hardwire terminaon, 10’
SYN-9652 MINV negave connecon to hardwire terminaon, 10’
Other opons may be available. Contact [e-mail] or visit the website: hp://www.
synqor.com for more informaon. If it is necessary to develop custom cables for your applicaon,
please read through the following secon for some important consideraons. Damage caused
by improper wiring of cables will not be covered under SynQor’s warranty.
Both the input and output cables of the MINV carry substanal current, and since the wires in
these cables have resistance the current owing through them causes a voltage drop from one
end of the cable to the other. In other words, the voltage across the cable at its downstream end
is smaller than the voltage across the cable at its upstream end. Mathemacally, the amount
that the voltage drops is equal to the resistance of the cable’s wire mulplied by the current
owing through the wire. It is therefore important to make sure that the resistance of the cable’s
wire is small enough to keep this voltage drop to an acceptably small value.
While this is an issue for all of the power cables, it is parcularly important for the DC INPUT
cables because the current owing through it is very high (as high as 240 A for the MINV-4000
Series) and the voltage across it is already relavely small (as low as 20 V). In fact, a common
problem that arises (when the DC INPUT cable has too small a wire) is that the voltage seen at
the DC INPUT of the MINV falls below the minimum specied value of 20 V even though the
voltage at the source of the DC power is greater than 20 V. Under this condion the MINV will
turn o its output even though the voltage at the DC source of power appears to be available
and at a proper level.
The resistance of a wire depends directly on its length. A wire twice as long as another will
have twice the resistance, holding all other things constant. The resistance also depends on
the reciprocal of the cross-seconal area of the wire, which in turn depends on the square of
the wire’s diameter. A wire with half the diameter of another will therefore have four mes the
resistance, holding all other things constant.
Therefore, the longer a cable is, the more important it is that the wire’s diameter be large.
SynQor recommends that for the MINV-4000 Series:
• The AC OUTPUT cable has 3 wires (one for the ground) of ≥ 8 AWG for the 115 V output
model and ≥ 12 AWG for the 230 V output model
• The DC INPUT cable has 2 wires (one for each pole) of 0 (1/0) AWG
Addional details about the eects of a resistance-related voltage drop are included in “Trouble-
Shoong Guide - Cable wire resistance is too high”.

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Section III Operation
Set-Up
The recommended procedure for seng up the MINV is the following:
• Connect the ground wire to the ground stud on the rear panel of the MINV.
• Connect the AC OUTPUT cables, rst to the MINV and then to the load.
• Connect the USER I/O cables.
• Connect the DC INPUT cables, rst to the MINV and then to the DC source.
• An overcurrent protect and disconnect device should be installed on the DC INPUT
circuit. An example of a suitable device is a Carling Technologies, F-series, 300 A 125 Vdc,
FA2-P0-14-830-22A-BT circuit breaker. (www.carlingtech.com)
• VERIFY that the DC INPUT cables are connected to the MINV and the source of DC power
with the correct polarity.
• Turn on the source (if it has an up stream breaker).
Start-Up
• VERIFY that all connecons to the MINV are correct.
• If the DC source is present and within specicaons, the single POWER IN LED on the front
panel will be green.
• Momentarily push the ON/OFF switch on the front panel of the MINV upward. The switch
can then be released and it will return to its normal (neutral) posion.
• The MINV will immediately enable its outputs (assuming there is no fault condion). The
color of the POWER OUT LED(s) on the front panel will change to green. The LOAD LEDs on
the front panel will indicate the amount of power being delivered to the load
Shut-Down
• Shut down the equipment connected to the MINV.
• Push the ON/OFF switch on the front panel of the MINV downward and hold it in this posion
for 1 second (or more). The switch can then be released to return to its normal posion.
• The MINV will disable its outputs.

Section III Operation
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Power Cable Connecons
For safety reasons, the input and output power cables should be connected to the MINV before
the source of DC power is turned on, and before the MINV is turned on (see Secon I: Warnings
and the SET-UP secon above). Similarly, one should rst turn o the MINV and the source of
input power before any power cables are disconnected from the MINV.
ALSO NOTE that when the MINV is turned on and delivering power to a load, and then another
piece of equipment is connected to the same output, it is possible that this connecon will
momentarily disrupt the quality of the MINV’s output voltage. For instance, consider the case
where the AC OUTPUT power cable has a terminal strip that allows several loads to be connected
to it. If the MINV is turned on and delivering power to several of these loads and then another load
is connected to the terminal strip, it is possible that this new load will momentarily draw a large
surge of current as it starts up. If this happens, the output of the MINV could reach its maximum
current limit, and the MINV will reduce its output voltage to keep the current from geng any
larger. This reducon in voltage will be corrected once the new load reaches its normal mode of
operaon, but in the meanme the reducon of the MINV’s output voltage might cause one or
more of the other loads to malfuncon. Whether or not this will be a problem depends on the
characteriscs of the various loads.
Cooling System
The SynQor MINV-4000 Series products are cooled by dual counter-rotang fans that draw air
into the intake on the front panel and exhaust it out the two fan ports on the rear panel. Care
should be taken to ensure there is no obstrucon to this airow, either at the front intake or the
rear exhaust ports. Similarly, care should be taken to avoid obstrucng the fan blades.
The speed of the cooling fans is automacally controlled to provide adequate MINV cooling
while extending the life of the fan bearings. Under low ambient temperature and/or low MINV
output power the fans will be driven at a low speed or turned o. Fan speed is increased by the
internal controller based upon readings from mulple internal temperature sensors.
If the ambient temperature is low enough (for the level of power being delivered to the load),
the fans may not be on. This is not a malfuncon. It is done to preserve the life of the fans. If the
fans are o, check the Fan Service Required LED on the front panel of the baery pack. If it is
GREEN, the fans are funconing properly and simply not needed under the present condions.
The fans are weather-proof and water-proof.
The MINV has two fans to provide redundancy for these exposed, moving components. With
only a single operang fan the MINV is sll able to deliver 80% rated power at an ambient
temperature of 40°C, and it is able to deliver 60% of its rated power at an ambient temperature
as high as 55°C.

Section III Operation
006-0006885 08/14/18 Rev H 18 of 48 MINV-4000-1U-28 Guide www.synqor.com
The LED in posion A1 indicates the status of the AC OUTPUT, according to the table below
LED Appearance Description Indication
Green MINV is On and the Output Voltage is
Within Range
Amber MINV is On but the Output Voltage is
Out of Range
Red MINV is Off and the Output Voltage is Within Range
Off MINV is Off
Front Panel Indicators
To indicate the status of the MINV there are 11 LEDs on the front panel. These indicators are
described in this secon.
LEDs
Each MINV has up to 11 LEDs, as shown below, that indicate the status of the operaon of the MINV:
MINV Single Output LED Status Label
• Power-In Indicator (LED in posion D0)
The LED D0 indicates the status of the DC INPUT, according to the table below:
LED Appearance Description Indication
Green Input is Ready to Provide Load Power
Amber Input is Not within Range
Red Input is Not Present
Off MINV is Off
• Power-Out Indicator (LED in posion A1)

Section III Operation
006-0006885 08/14/18 Rev H 19 of 48 MINV-4000-1U-28 Guide www.synqor.com
• Load Power Indicators (LEDs in posions B0 – B3)
The LEDs in posions B0 through B3 indicate the total output power of the MINV according to the table:
LED Appearance Description Indication
B0 Dimmed Green;B1-B3 Off Total Load Power <25%
B0 Green; B1 Dimmed Green; B2-B3 Off Total Load Power <50%
B0, B1 Green;
B2 Dimmed Green; B3 Off Total Load Power <75%
B0, B1, B2 Green;
B3 Dimmed Green Total Load Power <100%
B0; B1; B2 Green;
B3 Blinking Red Total Load Power ≥100%
• MINV Fan Service Required Indicator (LED in posion C0)
The LED in posion C0 indicates whether the two cooling fans in the rear panel of the MINV are OK or if
their performance is degraded, according to the table below:
LED Appearance Description Indication
Green Both Fans are OK
Amber One or Both Fans Have Recently Had Degraded Performance
and Diagnostic Tests are Being Performed
Red One or Both Fans Presently Have Degraded Performance
• MINV Cooling System Indicator (LED in posion F0)
The LED in posion F0 indicates the temperature and status of the cooling system for the MINV according
to the table below:
LED Appearance Description Indication
Green Moderate MINV Temperature
(Fans Running at 25%)
Blinking Green Warm MINV Temperature
(Fans Running at 50%)
Amber Elevated MINV Temperature
(Fans Running at 75%)
Red Maximum MINV Temperature
(Fans Running at 100%)
Blinking Red Over Temperature Warning
(Fans Running at 100%)

Section III Operation
006-0006885 08/14/18 Rev H 20 of 48 MINV-4000-1U-28 Guide www.synqor.com
• Control Status (LED in posion E0, E1, E2)
The LED in posion E0, E1 or E2 indicates whether RS232 or Ethernet Port, Remote Enable/Shutdown or
Bale Short are acve:
LED Appearance Description Indication
Green E0: RS232 active or Ethernet Port Active,
E1: Remote Enable Active
Blinking Red E2: Battle Short Mode Active,
Temperature Shutdowns Removed
Red E1: Remote Shutdown Active
Audible alarm
For crical situaons a paern of audible tones will be repeated every 5 seconds, according to the
table below. This audible alarm can be silenced by holding the ON/OFF switch on the front panel in
the “UP” posion while the MINV is operang and its output is running, or in the “DOWN” posion
while in Standby Mode, unl a chirp is heard. A new alarm condion will cause the audible alarm
to be reacvated. Contact Factory for instrucons on how to permanently silence the alarm.
Number of Tones in Pattern Indication
One Input Voltage is Lower than Minimum Operating Level
Two Load Power is greater than or Approaching 100% Rated Power
Three Fault Appears on the AC Output
MINV Must be Turned Off and Back On to Reset Fault
Four One or More Fans have Encountered a Fault and Require Service