phytron
Error Messages:
Undervoltage/Overvoltage
The red LED blinks by second cycle in case of undervoltage/overvoltage.
Reasons:
•
The supply voltage at the internal load capacitor has dropped under 20 V.
•
An electronic current limitation or a not adequate smoothing of the DC voltage
can be the reason for a short time break of the supply voltage.
•
The rotator energy is supplied back as electric energy to the power stage like a
generator. Raising in the internal load capacitor will be the result. The error
message ‘overvoltage’ is caused off by operation with maximum power supply
(70 V), by motor mass ineratia (> 1.3 x 10
-4
kgm
2
) and high revolutions per
minute ( > 20 rev/s).
Overcurrent/Short circuit
The red LED shines permanently in case of overcurrent/short circuit.
Reason:
•
A short circuit has occurred phase to phase or phase to ground.
Short circuit
phase to phase and phase to ground
is
detected from a
current setting of 0.7 A
r.m.s.
!
•
The ohmic resistance of the motor winding is too less. See chap. 6.0
Overtemperature Power Stage
The red LED blinks fast.
Reason:
•
The temperature at the heat sink of the transistors is too high (> 85° C).
The power stage is powered off.
Resetting is possible under 70°C.
31
MA 2102-A005 GB
