Alpha Vision Tech MPS48-7M Manuel D’Utilisation

24

021-511-B4-002, Rev. B

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. 

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.

Input Voltage

Output Voltage

Output Power

Battery Voltage

Battery Temperature

Battery Current

Remaining Battery Capacity