User's Manual

TD 93021US Rev A
10 FEB 2014 / Ver A 14
Installation Guide
teleCARE IP
Re-energize the power supply.
4.2.2 Power Supply (Seismic) Operation and Maintenance
The HPFF8 Power Supply should be tested at least once a year for proper operation. Under normal
load conditions, the DC output voltage should be checked for proper voltage level, which is 24Vdc for
the teleCARE IP system.
Under normal load conditions, check that the battery is fully charged. Check for the specified voltage
(24Vdc) at both the battery terminals and power supply board terminals marked [+BAT-] to ensure
there is no break in the battery connection wires.
Note:
• The maximum charging current under discharge is 0.75 amperes.
• Expected battery life is 5 years. However, it is recommended to change the batteries in 4 years, or
less if needed.
The HPFF8 provides supervised functions of the field wiring for the following adverse conditions:
• Field-wiring fault (short or open) on the teleCARE IP power bus.
• AC failure or brownout at the power supply.
• Battery failure (no battery or battery voltage less than 20.5Vdc) condition at the power supply.
• Battery charger failure on the power supply.
• Ground fault condition.
• +/- Reference Resistor
There are 8 LEDs on the Control Circuit Board for indicating normal and trouble operation of the
HPFF8 Power Supply (see Figure 1.1 in the HPFF8 Installation Manual.) When viewed from top to
bottom, the LEDs operate as follows: