SECTION 6
SERVICE
Pacific Power Source ©2013
6-26
Document # 126050-10 Rev E
6.3.4 EMER OFF SERVICE PROCEDURE
In the case of an EMER OFF condition, follow these directions to locate a fault to
the PCB level or component level as appropriate. Do not use this procedure
unless instructed to do so by the performance check flow chart.
The numbered comments below correspond to the circled numbers on Figure
6.3.4 and provide detailed instructions relative to the referenced step.
1.
Press the DIAG then f1 KEYS, the cause of the EMER OFF should be
displayed. If possible, correct the fault. If the cause is not displayed,
press the f4 KEY to determine which bit(s), on the NOW line would cause
an EMER OFF. If a bit is true (1), this could be the cause (Ref 4.4.1).
MASTER EMERGENCY OFF - the Master of the system was/is in an EMER OFF
state. Reset the Master's EMER OFF.
SUSTAINED OVERLOAD - the system was in an overload condition for an
extended period of time and shut off. Press the OUTPUT then f2 KEYS to
display the system load in percentages, %I-PEAK, %kVA and %kW. If any of the
six fields are greater than 100% the machine is overloaded.
INPUT LINE FAULT - input voltage is wrong (Ref 4.3.1.1). Correct the input
voltage.
INVERTER FAULT - inverter or modulator PCB failure. If F10 or F11 are open,
power transistors in the Inverter module may have shorted. Replace the
transistors in pairs, also replace both fuses.
EMER OFF BUTTON - EMER OFF button was pushed. Press START RESET to
clear.
TRANSFORMER OVERTEMP - input transformer has overheated. Allow to cool
by leaving the fans on. This may take several hours.
INVERTER TEMP - one of the inverters has overheated. A fan may have failed.
LVPS FAULT - regulated ±12 VDC on one of the
PCB’s has failed.
BUS VOLTAGE > 240 VDC - input voltage is too high, the input transformer is
wired wrong or power has been backfed into an inverter ouput.
EXTERNAL EMERGENCY OFF - pin 19 of a paralleling connector has positive
voltage applied.
NO MASTER ON LINE - one and only one cabinet must be a master.