Operating Instructions

Chapter 7 – Troubleshooting
Siemens Building Technologies, Inc. 71
Error Cause Diagnosis/Remedy Reaction
F0022, Power
stack fault
The fault is caused by the
following events:
(1) dc link overcurrent =short
circuit of IGBT.
(2) short circuit of dc link chopper
(3) earth fault.
Frame sizes A to C = (1),(2),(3).
Frame sizes D to E = (1),(2).
Frame size F = (2).
Since all these faults are
assigned to one signal on the
power stack, it is not possible to
establish which one actually
occurred.
Off2
F0023, Fault at
SED2 output
• The On-phase is
interrupted at the SED2
output.
Off2
F0024, Rectifier
overtemperature
• The ventilation is
inadequate.
• The fan is inoperative.
• The ambient
temperature is too high.
Check the following:
• The fan must turn when the SED2 is
running.
• The pulse frequency (P1800) must
be set to default value 4 kHz.
F0030, Fan Fault
• The fan no longer
works.
The fault cannot be masked while the options
module (BOP or AOP) is connected.
Replace the fan.
Off2