McQuay TSC User Manual

OM Centrif Micro ΙΙ-5 91
Fault/
Log
No.
Fault
Clas
s
Fault/Event
Recorder Text
Description/Possible Solutions
50 Crit Key Pad Failure
The door mounted keypad has failed.
The Stop or Start button was held down while a computer reset was
performed or while power was applied to the unit.
51 Crit TT Overcurrent Limit
During TruTorque ramping, the motor current exceeded the TruTorque
Overcurrent Trip level
52 Crit Curr. At Stop
Current flow above the no current at run setting was detected while the
starter was stopped.
Examine starter for shorted SCRs.
53 NonC No Curr. At Run
The motor current went below the no current at run setting while the
starter was running.
The load was disconnected while running.
The motor is being driven by the load.
56 NonC Phase Detection
64 Dis Bad RTD Detected A bad RTD was detected (open or shorted lead).
65 NonC RTD Alarm Limit A RTD alarm set point was exceeded.
66 NonC RTD Comm Loss
Communications with the RTD module was lost.
Check RS-485 wiring between the RTD module and card.
Check 24VDC RTD module power supply.
67 NonC PWR DIP data Lost PWR DIP data lost
68 NonC Jog Timer Limit
The jog timer (see page ) expired.
Examine reason for extended jog operation.
69 NonC Zero Speed Timer
The zero speed timer (see page 71) expired.
• Check motor for jammed or overloaded condition
70 NonC Low Control PWR
Control power is too low.
Examine control power transformer input and output voltages.
Check wiring between control power source and starter.
71 NonC Ground Fault A ground fault current above the ground fault setting was detected.
72 Crit DIP SW set Wrong
CT burden DIP switch set incorrectly.
Set switches correctly (see page 21).
73 NonC Bypass Fault
The bypass contactor failed to stay energized.
Check separate bypass for proper wiring.
Check integral bypass (RSxB units) control card fuses.
74 NonC UTS Timer Limit
The motor was not at full speed before the UTS time expired.
Check motor for jammed or overloaded condition.
75 NonC External Trip
Power was removed from the external trip input on the computer card
(JC13-1).
Trip input delay is set to short
76 Crit Disconnect Open A start was commanded while the disconnect was open.
77 NonC In-line Fault
The in-line contactor did not close.
Check wiring to coil of contactor.
Check feedback wiring from auxiliary contactor to JC13-4 terminal.
check in-line fault delay
78 NonC Over Curr Trip The current went above the over-current trip setting
79 NonC Under Curr Trip
The current went below the under-current trip setting
80 NonC High Field Curr.
The field current was above the maximum field current setting.
• Examine parameter settings for improper adjustment.
• Examine field for problem causing the high field current
81 NonC Field Loss
There was no synchronous field current.
Check wiring and motor for open field circuit.
82 NonC Loss of SYNC
The motor came out of synchronization while it was operating.
Examine the motor load for an overload.
Increase the field current up to the maximum for the motor.
Change from power factor control to current control mode for a varying
load
83 NonC High PF Trip
The motor power factor went above the high power factor trip
setting.
84 NonC Low PF Trip
The motor power factor went below the low power factor trip
setting.
87 NonC Incomplete Seq.
The motor was not synchronized before the sequence timer
expired.
90 Crit OL Lock
Used to set the operation of the overload.
Continued on next page.

McQuay TSC Specifications

General

Brand	McQuay
Model	TSC
Category	Controller
Language	English