Mosa GE 6000 SX/GS User Manual page 54

© MOSA REV.3-07/06
Problem
Absence of output voltage
No-load voltage too low or
too high
Corrected no-load voltage
too low with load
Unstable tension
Troubleshooting
Possible cause
4) Water radiator or oil clogged (where it
is assembled)
5) Water circulating pump defective (Only
for water cooled motors)
6) Injectors defective. Injection pump
requires calibration
7) Alarm malfunction
1) Voltage switch in position 0
2) Voltage switch faulty
3) Protection tripped due to overload
4) Differential protection device tripped.
(Differential switch, differential relay)
5) Protection devices defective
6) Alternator not sparked
7) Alternator defective
1) Incorrect motor running speed
2) Voltage regulating device (where it is
assembled) defective or requires
calibration
3) Alternator defective
1) Incorrect motor running speed due to
overload
2) Load with cos ϕ less than 0.8
3) Alternator defective
1) Contacts malfunctioning
2) Irregular rotation of motor
3) Alternator defective
GE
Diesel engine
ENGINE
4) Clean cooling fins on radiator
5) Ask for intervention of Service
6) Ask for intervention of Service
7) Check the sensor and electrical
GENERATOR
1) Check position
2) Check connections and working of
3) Check the load connected and
4) Check on the entire installation:
5) Replace
6) Carry out external spark test as
7) Check winding, diodes, etc. on
1) Regulate speed to its nominal no-
2) Adjust regulator device as indicated
3) Check winding, diodes, etc. on
1) Check the load connected and
2) Reduce or rephase load
3) Check winding, diodes, etc. on
1) Check electrical connections and
2) Ask for intervention of Service
3) Check winding, diodes, etc. on
Solution
Department
Department
circuit
the switch, repair or replace
diminish
cables, connections,
connected have no defective
sheathing which may cause incorrect
currents to ground
indicated in alternator manual. Ask
for intervention of
Department
alternator (Refer to alternator
manual)
Repair or replace.
Ask for intervention of Service
Department
load value
in alternator manual, or replace
alternator (Refer to alternator
manual)
Repair or replace
Ask for intervention of Service
Department
diminish
alternator (Refer to alternator
manual)
Repair or replace
Ask for intervention of Service
Department
tighten
Department
alternator (Refer to alternator
manual)
Repair or replace
Ask for intervention of Service
Department
M
40.2.
1
utilities
Service