Table 92: Safety shutdown messages
Message Description
VSD – HIGH
PHASE A MOTOR
BASEPLATE
TEMPERATURE
The motor/inverter IGBT module temperatures are continuously monitored by
the gate driver board where the highest temperature for each phase is read.
The highest temperature is sent to the VSD logic board where the temperature
is compared against a threshold value. If any IGBT module on the motor/
inverter exceeds this threshold value then this shutdown will occur. The cooling
fans and pumps for the VSD will continue to run until the temperature of all the
IGBT modules fall below 165°F (73.8°C). In April of 2016 the shutdown control for
the fan(s) and pump(s) was changed. The control will now keep the fan(s) and
pump(s) running for 2 minutes after the fault occurred. This change occurred
in software version C.HYP.03.04.01, and C.HYP.04.04.01. When this happens, the
unit’s fan(s) and water pumps shall be de-energized. When the condition clears,
the chiller can be started after the CLEAR FAULTS key is pressed.
Drive model High phase input baseplate temperature shutdown value
0490, 0490A,
0612A, 0730A, 0774
190°F (87.8°C)
1278A (380-414 VAC) 180°F (82.2°C)
1278A (460 VAC) 170°F (76.6°C)
VSD – HIGH
PHASE B MOTOR
BASEPLATE
TEMPERATURE
See VSD – HIGH PHASE A MOTOR BASEPLATE TEMPERATURE message
preceding.
VSD – HIGH
PHASE C MOTOR
BASEPLATE
TEMPERATURE
See VSD – HIGH PHASE A MOTOR BASEPLATE TEMPERATURE message
preceding.
VSD – HIGH
TOTAL DEMAND
DISTORTION
This shutdown indicates the input current to the VSD is not sinusoidal. This
shutdown will occur if the Total Demand Distortion (TDD) exceeds 25%
continuously for 45 seconds. The displayed TDD is the sum of the harmonic
currents up to the 50th harmonic supplied by the main power to the VSD divided
by the Full Load Amps. The chiller can be started after the CLEAR FAULT key is
pressed.
VSD – INPUT
CURRENT
OVERLOAD
The input current overload value is variable based on the Input Job Full Load
Amps value programmed at the Control Panel. The input current overload value
is 1.16 times the Input Job Full Load Amps value, but not to exceed the value
for the given model of drive listed below. This calculation takes into account
installations where the input line voltage could be up to 10% below the nominal
value. An additional 5% of current is added to reduce nuisance shutdowns due
to power fluctuations. To provide addition time for the chiller too unload, the
input current overload value must be greater than the shutdown value for 10
continuous seconds for this shutdown to occur. When the condition clears, the
chiller can be started after the CLEAR FAULTS key is pressed.
Drive model Input current maximum overload
0490 416 Amps
0490A 511 Amps
0612A, 0730A 650 Amps
0774 825 Amps
1278A 1195 Amps
YMC
2
Mod B with OptiView
™
Control Center
136
To Next Page
Loading...
