Deutsch dropdown-ico

American Power Conversion MX28B200 Bedienungsanleitung

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61

Zur Seite of

Ähnliche Gebrauchsanleitungen

Richtige Gebrauchsanleitung

Die Vorschriften verpflichten den Verkäufer zur Übertragung der Gebrauchsanleitung American Power Conversion MX28B200 an den Erwerber, zusammen mit der Ware. Eine fehlende Anleitung oder falsche Informationen, die dem Verbraucher übertragen werden, bilden eine Grundlage für eine Reklamation aufgrund Unstimmigkeit des Geräts mit dem Vertrag. Rechtsmäßig lässt man das Anfügen einer Gebrauchsanleitung in anderer Form als Papierform zu, was letztens sehr oft genutzt wird, indem man eine grafische oder elektronische Anleitung von American Power Conversion MX28B200, sowie Anleitungsvideos für Nutzer beifügt. Die Bedingung ist, dass ihre Form leserlich und verständlich ist.

Was ist eine Gebrauchsanleitung?

Das Wort kommt vom lateinischen „instructio”, d.h. ordnen. Demnach kann man in der Anleitung American Power Conversion MX28B200 die Beschreibung der Etappen der Vorgehensweisen finden. Das Ziel der Anleitung ist die Belehrung, Vereinfachung des Starts, der Nutzung des Geräts oder auch der Ausführung bestimmter Tätigkeiten. Die Anleitung ist eine Sammlung von Informationen über ein Gegenstand/eine Dienstleistung, ein Hinweis.

Leider widmen nicht viele Nutzer ihre Zeit der Gebrauchsanleitung American Power Conversion MX28B200. Eine gute Gebrauchsanleitung erlaubt nicht nur eine Reihe zusätzlicher Funktionen des gekauften Geräts kennenzulernen, sondern hilft dabei viele Fehler zu vermeiden.

Was sollte also eine ideale Gebrauchsanleitung beinhalten?

Die Gebrauchsanleitung American Power Conversion MX28B200 sollte vor allem folgendes enthalten:
- Informationen über technische Daten des Geräts American Power Conversion MX28B200
- Den Namen des Produzenten und das Produktionsjahr des Geräts American Power Conversion MX28B200
- Grundsätze der Bedienung, Regulierung und Wartung des Geräts American Power Conversion MX28B200
- Sicherheitszeichen und Zertifikate, die die Übereinstimmung mit entsprechenden Normen bestätigen

Warum lesen wir keine Gebrauchsanleitungen?

Der Grund dafür ist die fehlende Zeit und die Sicherheit, was die bestimmten Funktionen der gekauften Geräte angeht. Leider ist das Anschließen und Starten von American Power Conversion MX28B200 zu wenig. Eine Anleitung beinhaltet eine Reihe von Hinweisen bezüglich bestimmter Funktionen, Sicherheitsgrundsätze, Wartungsarten (sogar das, welche Mittel man benutzen sollte), eventueller Fehler von American Power Conversion MX28B200 und Lösungsarten für Probleme, die während der Nutzung auftreten könnten. Immerhin kann man in der Gebrauchsanleitung die Kontaktnummer zum Service American Power Conversion finden, wenn die vorgeschlagenen Lösungen nicht wirksam sind. Aktuell erfreuen sich Anleitungen in Form von interessanten Animationen oder Videoanleitungen an Popularität, die den Nutzer besser ansprechen als eine Broschüre. Diese Art von Anleitung gibt garantiert, dass der Nutzer sich das ganze Video anschaut, ohne die spezifizierten und komplizierten technischen Beschreibungen von American Power Conversion MX28B200 zu überspringen, wie es bei der Papierform passiert.

Warum sollte man Gebrauchsanleitungen lesen?

In der Gebrauchsanleitung finden wir vor allem die Antwort über den Bau sowie die Möglichkeiten des Geräts American Power Conversion MX28B200, über die Nutzung bestimmter Accessoires und eine Reihe von Informationen, die erlauben, jegliche Funktionen und Bequemlichkeiten zu nutzen.

Nach dem gelungenen Kauf des Geräts, sollte man einige Zeit für das Kennenlernen jedes Teils der Anleitung von American Power Conversion MX28B200 widmen. Aktuell sind sie genau vorbereitet oder übersetzt, damit sie nicht nur verständlich für die Nutzer sind, aber auch ihre grundliegende Hilfs-Informations-Funktion erfüllen.

Inhaltsverzeichnis der Gebrauchsanleitungen

  • Seite 1

    MX28B200/400 - 48 VDC POWER SYSTEMS User’s Manual (Document # 990 - 9133)[...]

  • Seite 2

    [...]

  • Seite 3

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page iii Table of Contents 1 SAFETY FIRST! ...................................................................................................................... 1 1.1. W ARNING S YMBOLS ......................................................................................................... 1 1.[...]

  • Seite 4

    Page iv MX28B200/400 – 48 VDC User’s Manual (990 - 9133) 4 OPERATION .......................................................................................................................... 23 4.1. T ECHNICAL D ESCRIPTION ............................................................................................... 23 4.2. R ECTIFIER M ANAGE[...]

  • Seite 5

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page v Revision History Revision Date By Description 1 31 JAN, 2002 JNF Converted to APC numbering 2 17 MAY, 2002 BET Updated Format Table of Figures FIGURE 2.1 - 1 MX28B - 400 – 48 VDC POWER PLA NT .................................................................3 FIGURE 2.1 - 2 MX28B BLOCK DI[...]

  • Seite 6

    [...]

  • Seite 7

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 1 1 Safety First! It is very important to follow all safety procedures when unpacking, installing and operating any sor t of power equipment. 1.1. Warning Symbols CAUTION : An indication that special care is required to prevent injury, equipment damage or misuse WARNING : An indication of an[...]

  • Seite 8

    [...]

  • Seite 9

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 3 2 Introduction 2.1. General Information DC Power Plants from APC have unique features that make them easy to install, maintain, and upgrade. The rectifier units are modular and truly “hot - pluggable” into the shelf assembl y without any separate AC wiring. All system settings are made[...]

  • Seite 10

    Page 4 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Figure 2.1 - 2 MX28B BLOCK DIAGRAM[...]

  • Seite 11

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 5 2.2. How to Use This Manual Each section of this manual can be read in any order and should provide a complete explanation of the subject described by the ti tle. However, the sequence of the sections is designed to provide a typical step - by - step process for successful use of the equip[...]

  • Seite 12

    [...]

  • Seite 13

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 7 3 Installation 3.1. Unpacking Equipment Remove equipment from packing material and inspect for shipping damage or missing items. It is important to report damage or material shortages to the shipping carrier while a representative is on site. If conce aled damage or material shortages are [...]

  • Seite 14

    Page 8 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Ventilation The rectifier modules for this system have fans that provide front - to - rear airflow for internal cooling. The MX28B housing should mounted such that there is free airflow to the front, top, and bottom of the unit. [Refer to Section 6.6 for environmental characteristics.] Fre[...]

  • Seite 15

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 9 WARNING : The MX28B DC power plant is supplied from a nominal 220VAC, 60 Hz source. Keep the AC input enclosure in place when the system is operational or energized. 3.4. Battery Connection s WARNING : Hazardous energy levels are present on bare conductors in the - 48VDC distribution conne[...]

  • Seite 16

    Page 10 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Figure 3.4 - 1 Battery Cable Connection Locations Battery Temperature Probe Installation The optional temperature probe is used to monitor the battery string temperature. To get the most representative temperature measurement, the probe should be placed in contact with a battery cell that[...]

  • Seite 17

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 11 3.6. DC Power Output Over - Current Protection DC Circuit Breakers A standard 24 - position plug - in circuit breaker tier provides - 48V distribution. Various circuit breaker sizes from 1 to 100 amps are available, with 60 - 100 amp breakers requiring two positions and a circuit breaker [...]

  • Seite 18

    Page 12 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Plug - in Circuit Breakers BREAKER RATING PART NUMBER BREAKER RATING PART NUMBER 1 A FFA - 0014 40 A FFA - 0020 3 A FFA - 0015 50 A FFA - 0025 5 A FFA - 0016 60 A 530 - 9088 10 A FFA - 0017 70 A 530 - 9089 15 A 530 - 9093 80 A 530 - 9090 20 A FFA - 0018 100 A 530 - 9091 30 A FFA - 0019 Pl[...]

  • Seite 19

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 13 DC GMT Fuses Eight GMT fused outputs are also available as an option. This option uses one of the 24 available circuit breaker positions. Connections to the GMT fuses are made at terminal block connectors labeled “F1” through “F8” that are located on the interface card mounted in [...]

  • Seite 20

    Page 14 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) 3.7. Installation of Circuit Breakers and Fuses Plug - in Circuit Breaker Installation CAUTION During circuit breaker installation, carefully align the breaker alarm terminals with the alarm terminal board to avoid breaker terminal damage. 1) Remove th e circuit breaker cover panel and th[...]

  • Seite 21

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 15 GMT Fuse Installation Fuse holders that accommodate GMT fu ses are located on the interface card mounted in the top left side of the unit. Insert the fuse in the holder; observing the tripped indicator is correctly oriented. These fuse holders are only connected to - 48VDC if the system h[...]

  • Seite 22

    Page 16 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Load Connections should be made as shown in Figure 3.8 - 1 Figure 3.8 - 1 Standard lug for 1 to 50A breakers. NOTE: Load return lugs are connected to the front of the return bus to prevent interfering with the top cover of the unit. Circuit Breaker Connections (60 - 100 Amps) Connections [...]

  • Seite 23

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 17 Figure 3.8 - 2 Adaptor and lugs for 60 - 100 Amp breakers GMT Fuse Connections GMT fuses are only connected to - 48VDC if the system has been purchased with the GMT fuse option. This option supplies - 48VDC to lugs on the interface card through #6 AWG power cables controlled by a 50 Amp c[...]

  • Seite 24

    Page 18 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) 3.9. Monitoring and Relay Output Connections Front Panel DB9 Connection The front panel DB - 9 connecto r is used to hook up a standard serial cable for the APC proprietary GUI that will be introduced at a later date. Do not hook up the special RS - 232 cable (APC part number 940 - 0024C)[...]

  • Seite 25

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 19 Output Relay Connections RELAY OUTPUT TERMINAL DESIGNATION NO - NC - C USER ALARM NOTES RELAY #1 RELAY #2 RELAY #3 RELAY #4 RELAY #5 RELAY #6 MINOR MAJOR J1 NO1 - NC1 - C1 NO2 - NC2 - C2 NO3 - NC3 - C3 NO4 - NC4 - C4 J2 NO5 - NC5 - C5 NO6 - NC6 - C6 NO7 - NC7 - C7 NO8 - NC8 - C8 _________[...]

  • Seite 26

    Page 20 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) 3.11. Rectifier Module Installation WARNING : Rectifier DC output circuits would be damaged if battery were installed incorrectly. Before rectifier installation, ensure proper battery polarity and that the battery is isola ted from the rest of the system The rectifier modules are shipped [...]

  • Seite 27

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 21 3) Verify that all rectifiers hav e been installed. 4) Apply AC Power. Turn on the circuit breakers that supply ac power to the rectifiers in the MX28B DC power plant. The main screen should appear on the control unit display (see Figure 4.6 - 1 ). T he display on the control unit is a 2 [...]

  • Seite 28

    Page 22 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) 3.14. Full Syste m Power Up To complete a full system power up, perform the following steps: 1) Turn OFF all the circuit breakers that supply ac power to the rectifiers in the MX28B DC power plant. Turn on the external circuit breaker from the battery to the power plant. Turn on all the c[...]

  • Seite 29

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 23 4 Operation 4.1. Technical Description The MX28B - 200/400 Power System is designed to supply safe –5 4 VDC primary power through the use of up to eight rectifier modules. In conjunction with an external battery string, it will supply backup power as well. The Power System Control Unit [...]

  • Seite 30

    Page 24 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) 4.3. System Management System Output Capacity T he power plant has two basic configurations: The MX28B - 200 supplies a maximum of 200 amps or 150 amps with N+1 redundancy. The housing for this configuration provides space for one rectifier shelf that can hold up to four rectifiers, a con[...]

  • Seite 31

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 25 System Status and Alarm Reporting The PSCU will monitor system volta ge using a high accuracy digital voltmeter attached to the system bus. The PSCU will monitor system temperature using a temperature IC mounted in the PSCU. The PSCU will monitor system current by summing the current repo[...]

  • Seite 32

    Page 26 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) batteries, possible thermal runaway. Battery Maximum Recharge Current is set to the appropriate rate, which is usually based on the size of the battery plant in Ampere - hours. A typical recharge current setting is battery capacity (abbreviated as “C”) divided by number of charging ho[...]

  • Seite 33

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 27 (right), “ ñ ” (up), and “ ò ” (down) arrow keys located on the front panel. The selected item on the display is identified by the cursor cycling beneath its characters. The “M” (modify) key and the arrow keys are u sed to set parameters and text to customize the system oper[...]

  • Seite 34

    Page 28 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Parameter Locations, Descriptions, and Defau lt Values The location, description, and factory programmed default value for each of the MX28B system parameters is found in the table below. The table also shows all of the status and information screens with typical displays. The location of[...]

  • Seite 35

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 29 PARAMETER NAME/ [MENU LOCATION] DESCRIPTION DISPLAY SCREENS / DEFAULT SETTINGS Battery Discharge Alarm Security Level {1} [BATT/SET - ALM] The output relay energized if the battery discharge current exceeds the programmed battery discharge threshold. Batt Disc Alm m+ Minor Battery Dischar[...]

  • Seite 36

    Page 30 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) PARAMETER NAME/ [MENU LOCATION] DESCRIPTION DISPLAY SCREENS / DEFAULT SETTINGS Circuit Breaker 1 Alias Security Level {1} [MODULES/CIRBKR/ALIAS] • • • Circuit Breaker 24 Alias Security Level {1} [MODULES/CIRBKR/ALIAS] An alternate name (alias) that can be assigned to a circuit break[...]

  • Seite 37

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 31 PARAMETER NAME/ [MENU LOCATION] DESCRIPTION DISPLAY SCREENS / DEFAULT SETTINGS Firmware Version {Status Only} [SYSTEM/SETUP] Version number of the control unit firmware. NOTE: Actual firmware version number displayed is the current version as of the date of manufacture. This parameter can[...]

  • Seite 38

    Page 32 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) PARAMETER NAME/ [MENU LOCATION] DESCRIPTION DISPLAY SCREENS / DEFAULT SETTINGS Input Relay 1 Security Level {1} [SYSTEM/IN - RLY/RLY - MAP] • • • Input Relay 4 Security Level {1} [SYSTEM/IN - RLY/RLY - MAP] The Output Relay that is energized when an external contact closure or openi[...]

  • Seite 39

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 33 PARAMETER NAME/ [MENU LOCATION] DESCRIPTION DISPLAY SCREENS / DEFAULT SETTINGS OEM S Offset Security Level {2} [OEM] Current offset adjustment for factory calibration of battery current readings/settings. OEM S Offset m+ 0.0 A Output Relay 1 Alarm Security Level {1} [SYSTEM/OUT - RLY/RLY [...]

  • Seite 40

    Page 34 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) PARAMETER NAME/ [MENU LOCATION] DESCRIPTION DISPLAY SCREENS / DEFAULT SETTINGS PIN Entry S ecurity Level {0} [PIN] Screen for entry of the active password (PIN). Before any changes can be made, the correct pin for the desires security level must be entered. Level 0 – full read access. L[...]

  • Seite 41

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 35 PARAMETER NAME/ [MENU LOCATION] DESCRIPTION DISPLAY SCREENS / DEFAULT SETTINGS Rectifier Fan Fail Alarm Status {Status Only} [MODULES/RECT/INFO] The status will be “ON” if the rectifier fan has failed. NOTE : This information can be viewed for each rectifier installed by using the hor[...]

  • Seite 42

    Page 36 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) PARAMETER NAME/ [MENU LOCATION] DESCRIPTION DISPLAY SCREENS / DEFAULT SETTINGS System Low Temperature Threshold Security Level {1} [SYSTEM/SET - ALM] System Temperature is ambient temperature measured inside the controller. An alarm will be reported if temperature is lower than the temper[...]

  • Seite 43

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 37 Control Unit Menu Struc ture The complete menu structure shown in the order in which it is accessed from the control unit display is presented in outline form below. Each indentation to the right represents a menu level below the indicated title. Top Leve l Second Leve l Third Le vel Four[...]

  • Seite 44

    Page 38 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Top Leve l Second Leve l Third Le vel Fourth Leve l • • Hw Batt T Alm • • Hw Sys T Alm • • Hw LVD Alm • SYS: + LM SETUP DATE PIN 1 • • PIN 2 • • Address 1 • • Address 2 • • Address 3 • • Model • • Fahrenheit • • Cntrl Rev • • FW Version • ?[...]

  • Seite 45

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 39 Top Leve l Second Leve l Third Le vel Fourth Leve l • • • Out-Rly 4 • • • Out-Rly 5 • • • Out-Rly 6 • • • Relay Minor • • • Relay Major • SYS: + LY IN-RLY DIAG SYS:IN- : + RLY-MAP ALIAS In-Rly 1 Alm • • • In-Rly 2 Alm • • • In-Rly 3 Alm • • [...]

  • Seite 46

    Page 40 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Top Leve l Second Leve l Third Le vel Fourth Leve l • • MOD:REC: + AM INFO Rect # Desc • • • Rect # Curr • • • Rect # CL • • • Rect # Stdby • • • Rect # FF • • • Rect # RFA • MOD: + CT CIR-BKR GMT MOD:CIR: + SET-ALM ALIAS Cir Bkr 1 Alm • • • Cir B[...]

  • Seite 47

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 41 Top Leve l Second Leve l Third Le vel Fourth Leve l • • • GMT 7 Alm • • • GMT 8 Alm • • MOD:GMT: + LM ALIAS GMT 1 • • • GMT 2 • • • GMT 3 • • • GMT 4 • • • GMT 5 • • • GMT 6 • • • GMT 7 • • • GMT 8 • M OD: + MT LVD MOD:LVD: + SET[...]

  • Seite 48

    Page 42 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Top Leve l Second Leve l Third Le vel Fourth Leve l • • Batt Max Rech • BAT: + AM COMP Comp Method • • Comp TC • • Comp HKnee • • Comp LKnee MX28B200/400 + ES BATT PIN OEM PIN MX28B200/400 + TT PIN OEM OEM R Offset • OEM R Gain • OEM S Offset • OEM S Gain Front Pan[...]

  • Seite 49

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 43 4.7. Alarm Outputs (Output Relays) There are eight alarm output relays designated Relay 1 through Relay 6, Minor, and Major, respectively. Various system parameters may be programmed to activat e any of these alarm relays when set thresholds are exceeded or specific conditions occur. The [...]

  • Seite 50

    [...]

  • Seite 51

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 45 5 Remote Monitoring 5.1. Description Remote monitoring and control of the DC power system is accomplished t hrough the use of the optional APC Network Management card. This card is a separate module mounted into the top panel of the system controller module. Complete documentation for the[...]

  • Seite 52

    [...]

  • Seite 53

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 47 6 Speci fications The overall system specifications can vary, depending upon the number of rectifier modules. Note that some specification items are provided on a “per rectifier” basis and must be combined or totaled for a give system configuration. 6.1. AC Input 1MRF28H54BV Rectifier[...]

  • Seite 54

    Page 48 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Rated Output Power (per Rectifier) 2800 W (45 º C) Efficiency 91% Typical 6.3. Controls and Indicators Rectifiers Input Healthy LED AC power present. Output Healthy LED DC output voltage within operating range ( - 39.5 to – 59.5 VDC). Output Current LED On when rectifier is supplying c[...]

  • Seite 55

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 49 voltage (54.5 VDC). Boost/Equalize Trim Pot The boost/equalize pot is used to adjust the default boost equalize voltage (57.5 VDC). 6.4. Controls and Indicators Power Shelf Control Unit Major (Red) On when M ajor Relay is de - energized* Minor (Yellow) On when Minor Relay is energized Nor[...]

  • Seite 56

    Page 50 MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Mounting Both front mounting on st andard 23 - inch rails and optional wall mounting are available .[...]

  • Seite 57

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 51 6.6. Environmental (Operating) - 45 º C to +55 º C (+65 º C with reduced power output) Ambient Temperature (Storage) - 45 º C to +85 º C (Operating) 0 – 85% RH (non - condensing) Humidity (Storage) 0 – 9 5% RH (non - condensing) (Operating) 3000 m (9840 ft.) Altitude (Storage) 10[...]

  • Seite 58

    [...]

  • Seite 59

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 53 7 APC Worldwide Customer Support Customer Support for this or any other APC pro duct is available at no charge. You can contact APC Customer Support in any of the following ways: • Use an APC web page to find answers to frequently asked questions (FAQs), to access documents in the APC K[...]

  • Seite 60

    [...]

  • Seite 61

    MX28B200/400 – 48 VDC User’s Manual (990 - 9133) Page 55 8 Warran ty General Provisions APC DC Network Solutions Inc. warrants the power equipment and components it manufactures or sells against defective materials and workmanship for a period of TWO (2) YEARS from the date of shipment. Warranty Returns If initial p hysical inspection results i[...]