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021-511-B4-002, Rev. B
6.0 Troubleshooting
6.1 Troubleshooting
Table
Troubleshooting Table
Fault
Corrective Action
Green LED is blinking after
initial startup
Verify AC power is ON. Check voltage at AC input block. Check
AC input connector on power module.
Red LED is ON solid
Replace batteries.
Red LED is blinking
If no batteries are missing, check battery connections. Check
battery string connector on power module.
Both red and green LEDs are
blinking
Possible overload condition. Verify load does not exceed rated
capacity of power supply.
Low battery runtime in cold
weather
Verify the battery heater mat is warming. Use compressed air to
lower temperature. Heater should come on at 32°F (0°C). Check
battery heater mat connection. If battery heater mat fails to come
on, replace it.
Battery heater mat does not
heat
Verify the ambient temperature is below 32ºF. Verify the voltage
input rating on the battery heater mat matches the input voltage
select switch. Units set to 120V will not heat battery heater mats
rated for 240V. Units set to 240V will damage battery heater mats
rated for 120V input.
Power module fails to come on
after applying 240V with the
voltage select switch set for
120V
Check the input voltage select switch. The power module can be
damaged by applying 240Vac to the unit when the input voltage
select switch is set to 120Vac. If the power module fails to
function after this fault, it must be replaced.
No power to the customer
connections (radio)
Verify the Radio and Power connector are properly connected.
6.2 Connecting to the Local Craft Port
Connect to the local Craft port using a laptop computer to view alarms sent to the radio from
the MPS48-7M. The MPS48-7M sends data to the radio once every three minutes under
normal conditions, and once every 30 seconds under alarm conditions. The table below lists
the reported alarms. Refer to the radio manufacturer's documentation for interface protocols
and necessary equipment. The serial communications protocol is available from Alpha
Technologies.
Alarms
Input Voltage
Output Voltage
Output Power
Battery Voltage
Battery Temperature
Battery Current
Remaining Battery Capacity
