File: SG524_r3eng - April 2017 - Technical note: SG 524 page 15 of 16
PM 250
SG 524
ALARM TROUBLESHOOTING *
Note*: the last alarm occured is permanently stored by the CPU, even in absence of main line, and
can be verified using the Front Panel software (vers. 7.20 and over)
Code
Description
Cause/Solution
0001
Power
Module Over
Temperature
a) Check if the fans are working or the rear of the air is obstructed
(heatsink fins side)
b) Check also the inlet openings for the incoming air flow.
c) Reduce ambient temperature
If the alarm persist, contact the service
0010
Reverse Power
Alarm
The reflected power has reached the alarm threshold. Set higher
threshold or start the automatic tuning to deacrese the reflected power.
0011
Power Module
Malfunction
(PLL)
Alarm linked to internal frequency generator. The CPU turns off the power
module automatically. After the alarm reset operation, the CPU turns
on the power module and checks possible alarms. If the alarm persist,
contact the service.
0100
Internal
Safety Relay
Malfunction
The internal safety relay could have been damaged (i.e by a shortcircuit
on the contact)
Try to restart the unit. If the alarm persist, contact the service.
0101
Power Supply
Undervoltage
The AC/DC power supply could have been damaged. Try to restart the
unit. If the alarm persist, contact the service.
Note: to reset the alarm you have to turn off the unit.
0110
AC/DC
Power Supply
Overtemper.
The fans of the AC/DC psu are not working properly and/or the ambient
air condition is too hot. Let the unit cool down, run at lower power, replace
fans if failed
0111
Internal
Overload (M1)
The circuit M1 has reached the limit current. Try to reset and restart at
lower power. If the alarm persist, contact the service.
1000
Internal
Overload (M2)
The circuit M2 has reached the limit current. Try to reset and restart at
lower power. If the alarm persist, contact the service.
1001
Open Interlock
Check interlock contact (OPEN = Alarm, closed = OK)
1010
Communication
interrupted
Alarm engaged only when the SG is run throught the serial port and no
valid character is received within time out
