There may be several specific warning signs on your system. A description of the warning signs are reviewed in this section. Please become familiar with all warning signs.
Ensure that all of the warning signs are legible. Clean the warning signs or replace the warning signs if the words cannot be read or if the illustrations are not visible. Use a cloth, water, and soap to clean the warning signs. Do not use solvents, gasoline, or other harsh chemicals. Solvents, gasoline, or harsh chemicals could loosen the adhesive that secures the warning signs. The warning signs that are loosened could drop off of the system.
Replace any warning sign that is damaged or missing. If a warning sign is attached to a part of the system that is replaced, install a new warning sign on the replacement part. Your Caterpillar dealer can provide new warning signs.
Labels
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| Illustration 1 | g01312162 |
"Danger Shock / Electrocution Hazard - Will Cause Serious Injury or Death. Read the Service Manual before Working on the UPS." | |
The label in Illustration 1 identifies the following information:
- An area where a risk of Shock / Electrocution hazard exists
- Indication that the service manual should be referenced
The label in Illustration 1 is used in the following locations:
- Inside the Input/Output Cabinet (IOC) adjacent to the label in Illustration 3
- Inside the Maintenance Bypass Cabinet
The label in Illustration 1 is used to call special attention to the label in Illustration 3. Failure to remove power from the equipment could cause serious injury or death.
- This label is used in conjunction with the label in Illustration 5 in order to call special attention to the label. The label is applied inside the control cabinet on the clear cover, inside the inverter cabinet on the sheet metal panel behind the door, and inside the Flywheel Cabinet on the sheet metal behind the door.
The DC Bus of this system can maintain a charge sufficient to cause a shock and energy hazard even when all external sources of power are removed. This hazard can cause serious injury or death. Perform the procedure for isolating and discharging the DC bus prior to servicing.
- Inside the Flywheel Cabinet adjacent to the label in Illustration 6
The label in Illustration 1 is used in order to call special attention to the label in Illustration 6. The label is used in order to alert service personnel that there are two separate sources of power that are connected to this equipment. To safely service this cabinet, the AC and DC sources must be isolated separately. Failure to remove power from the equipment could cause serious injury or death. A disconnect switch is provided for AC and DC power. Service personnel should keep in mind that the input side of these disconnect switches is still live.
- Inside the Control, Inverter, and Flywheel Cabinets adjacent to the current transformers
The label in Illustration 1 indicates that the leads must be shorted while you are servicing these parts. Failure to short the leads can lead to damage to the component and serious injury or death.
- Inside the MMU with DSB transformer cabinet adjacent to the fans
The label in Illustration 1 is used used in the area of a Electrical Shock Hazard. The label in Illustration 1 calls attention to that contact with the live bus bars must not be made while servicing the product. Failure to avoid contact with live bus bars could cause serious injury or death.
- Adjacent to the door latch on each cabinet of the system
Doors should be opened by trained personnel that are familiar with this product. Hazardous voltages exist inside this product that may lead to severe injury or death.
- Inside the static switch cabinet on each of the clear covers over the static switch assemblies
The label in Illustration 1 is used in conjunction with the label in Illustration 4 in order to call special attention to this hazard. The heat sinks and the nuts and bolts that are associated with mounting the clear cover to the heat sinks are electrically live at a hazardous voltage level. Contact may lead to severe injury or death. Power must be removed from this portion of the system prior to servicing these parts. While the power is on, caution should be taken in order to not contact the parts in this cabinet.
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| Illustration 2 | g01072201 |
"Warning: Do Not Operate or Work on this Equipment Unless You Have Read and Understand the Operation and Maintenance Manuals." | |
The label in Illustration 2 is used in the following locations:
- The inside panel of the optional Maintenance Bypass Cabinet
- The control panel for the Control Cabinet
- The control panel for the Flywheel Cabinets
Note: The operation of these controls is only for trained personnel. Incorrect operation of this equipment can lead to the interruption of the power to the critical load. In fault conditions, a hazardous condition could occur.
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| Illustration 3 | g01311666 |
"Warning: Risk of Electrocution, this UPS Receives Power from More than one Source" | |
The label in Illustration 3 is used to alert service personnel that there are two separate sources of power that are connected to this equipment. The label is found in the following locations:
- The inside of the Input/Output Cabinet
- The inside of the door of the Maintenance Bypass Cabinet
Service personnel must remove the power from the section of the equipment that is being serviced in order to safely service this product. The Maintenance Bypass Cabinet and the Input/Output Cabinet are not serviceable without removing power from both sources. Failure to remove power from the equipment could cause serious injury or death.
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| Illustration 4 | g01312484 |
"Risk Of Electric Shock - Heat Sink and Cover Nuts and Bolts are Live" | |
The label in Illustration 4 is used in the following locations:
- In the Static Switch Cabinet on the clear covers that are over the static switch heat sinks
The following items that are associated with the heat sinks are electrically charged when the system is charged: heat sinks, the nuts, the bolts and mounting hardware. The hardware that is associated with mounting the clear cover to the heat sinks is electrically live at a hazardous voltage level. Contact may lead to severe injury or death. Power must be removed from this portion of the system prior to servicing these parts. While the power is on, caution should be taken in order to not contact the parts in this cabinet.
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| Illustration 5 | g01311654 |
"Risk of Electric Shock and Electric Energy - High Current Levels. Disconnect and Discharge DC Capacitor Bank Prior to Servicing. See manual for instructions." | |
The label in Illustration 5 is used in the following locations:
- Inside the control cabinet on the clear cover
- Inside the inverter cabinet on the sheet metal panel behind the door
- Inside the Flywheel Cabinet on the sheet metal behind the door
The DC bus of this system can maintain a charge sufficient to cause a shock and energy hazard even when all external sources of power are removed. This hazard can cause serious injury or death. Perform the procedure for isolating and discharging the DC bus prior to servicing.
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| Illustration 6 | g01312406 |
"Warning: Risk of Electrocution. This Unit Receives Power From More Than One Source" | |
The label in Illustration 6 is used in the following location:
- Inside of the Flywheel Cabinet to alert service personnel that there are two separate sources of power that are connected to this equipment.
To safely service this cabinet, the AC and DC sources must be isolated separately. Failure to remove power from the equipment could cause serious injury or death. A disconnect switch is provided for AC and DC power. Service personnel should keep in mind the input side of these disconnect switches is still live.
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| Illustration 7 | g01312528 |
"DC Disconnect Only - AC Power Must Be Removed Separately." | |
- The label in Illustration 7 is used inside the Flywheel Cabinet adjacent to the DC disconnect switch to alert service personnel that there are two separate sources of power connected to this equipment.
To safely service this cabinet, the AC and DC sources must be isolated separately. Failure to remove power from the equipment could cause serious injury or death.
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| Illustration 8 | g01312532 |
"Red - Do Not Operate DC Disconnect Switch" | |
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| Illustration 9 | g01312547 |
"Green - OK To Operate DC Disconnect Switch" | |
- The label in Illustration 8 and the label in Illustration 9 are used inside the Flywheel Cabinet to indicate that the DC disconnect switch should, or should not be operated, corresponding to the lights on the panel adjacent to the switch.
Failure to follow these instruction may lead to damage to the equipment, and in some cases serious injury or death. Review the service manual for proper procedures for putting the equipment into the correct state for operating the isolation switch.
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| Illustration 10 | g01312568 |
"Push to Test" | |
- The label in Illustration 10 is used inside the Flywheel Cabinet to identify the push button that is used to test the indicator lights.
This test button should be used if no light is illuminated. If you are unsure of the equipment state, the DC disconnect switch should not be operated. Failure to follow these instruction may lead to damage to the equipment, and in some cases serious injury or death. Review the service manual for proper procedures for putting the equipment into the correct state for operating the isolation switch.
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| Illustration 11 | g01312581 |
"Live Bus - Risk of Shock / Electrocution Hazard" | |
- The label in Illustration 11 is used in the Maintenance Bypass Cabinet on the live bars at the bottom of the cabinet that is underneath the circuit breaker in the Maintenance Bypass Cabinet.
These bus bars are live when the equipment is energized. Contact with live bus bars will cause serious injury or death. Remove power from the system prior to servicing the Maintenance Bypass Cabinet.
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| Illustration 12 | g01312584 |
"Test SCR's Before Reset" | |
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| Illustration 13 | g01312586 |
"Read the Service Manual before Working on the UPS" | |
- The label in Illustration 12 and the label in Illustration 13 are used in the Input/Output Cabinet adjacent to the reset switch.
The static switch SCRs must be tested in accordance with the service manual prior to operating this switch.
Failure to do so may lead to the equipment being operated with shorted SCRs. Shorted SCRs can lead to severe injury or death if the system back-feeds power upstream.