69
MODE 3:
Relay
Normally Open Contacts Closed if These Conditions Exist
1
UPS is producing output power AND battery has been discharging for at least 10 seconds.
2
UPS has either shut down due to an abnormal condition, is in overload or over-temperature condition,
or has detected a diagnostic or warning condition (UPS needs attention).
3
UPS is running from battery and battery charge has fallen below 20%. Relay is then not opened again
until battery charge has risen above 80% AND 2 hours have passed. This relay output can be used to
signal an external transfer switch to switch to an alternative source in the event that the original
source is outside of the UPS’s operating range. This relay output should be OR’d with the external
transfer switch’s command to switch to an alternate source.
4
UPS is producing output power AND Transfer Switch is in the ON UPS position.
Note: A remote status panel manufactured by Mesta is available that works with Mode 1 to provide an
audible alarm controlled by relay 1, a green light by relay 2, a yellow light by relay 3, and a red light by
relay 4. A pushbutton switch silences the audible alarm. A remote status indicator can provide
important status information to personnel in situations where the UPS is placed in an area that is
normally unattended. Other arrangements are also available from the factory.
APPENDIX C.
WARRANTY/SERVICE AND REPAIR
LIMITED WARRANTY POLICY
Mesta Electronics, Inc. warrants its UPS to be free from defects in materials and workmanship for a
period of 1 year from the date of original shipment from the factory, provided the UPS has not been
abused, misused, or used outside of the specified conditions. Mesta Electronics, Inc. will be the sole
determiner as to whether the UPS has been abused or misused. If found to be defective, the UPS will
be repaired or replaced at the discretion of Mesta Electronics, Inc. An extended warranty may be
purchased. The battery manufacturer's warranties are passed through by Mesta Electronics, Inc. to the
customer. Before returning any UPS, in or out of warranty, to Mesta Electronics, purchaser must
contact Mesta's Customer Service Department. Any UNAUTHORIZED return of a UPS to Mesta
Electronics for in-warranty or out-of-warranty repairs will be subject to an inspection and handling
charge, in addition to all associated repair and transportation costs. Mesta Electronics, Inc. will be in no
way responsible for any consequential damages of any kind or nature whatsoever resulting from the
use of its UPS in any manner whatsoever and/or from the breach of any warranty, express or implied.
