RKI Instruments 49-8104RK - Manual (Page 12)

12 • 49-8104RK Standby Battery
Maintenance
This section describes preventive maintenance and troubleshooting procedures. It also
includes component replacement procedures and a parts list.
Preventive Maintenance
Check the standby battery voltage with a volt meter on a quarterly basis and verify that it
is fully charged. A fully charged standby battery connected to a controller that trickle
charges it will typically measure between 28 volts and 29 volts.
Troubleshooting
The troubleshooting guide describes symptoms, probable causes, and recommended
action for problems you may encounter with the standby battery.
Replacing a Battery
If one of the 12 VDC batteries in the standby battery needs replacement, RKI Instruments,
Inc. recommends that both batteries be replaced. The part number for a replacement
battery is listed in the parts list at the end of this section. Follow the instructions below to
replace the batteries.
1. Turn off the controller.
2. Turn off power to the controller.
3. Open the standby battery housing door.
4. Remove the jumper wire that connects the two batteries. It connects to both batteries
with a push-on lug.
5. Remove the remaining two connections to the batteries, the positive and negative
connections, by removing the push-on lugs from each battery.
6. Fix the positive and negative wires out of the way.
7. Unscrew the top two screws retaining the battery bracket to the case. Hold the battery
bracket in place so that the batteries do not fall out of the case.
8. While holding the battery bracket in place, unscrew the bottom two screws retaining
the battery bracket in place. Be careful when the screws are removed as the batteries
are heavy and may fall out of the housing if the battery bracket is not held firmly
when the screws are removed.
Condition Symptom(s) Probable Causes Recommended Action
Low Battery
Voltage
• The standby battery
voltage measures
below 28VDC at the
quarterly voltage
check.
• The wiring to the
controller is
disconnected or
misconnected.
• The wire nut
connections in the
standby battery are
not properly made.
• The wiring to the
battery terminals in
the standby battery is
disconnected.
• The controller is not
fully charging the
standby battery.
1. Verify that the wiring at the
controller is correct and secure.
2. Verify that the wire nut connections
in the standby battery are properly
made.
3. Verify that the lugs that fit over the
battery terminals are securely and
correctly installed.
4. Check the DC fuse at the controller.
5. If the low voltage condition
continues, contact RKI for further
instruction.