Table 89: Warning messages
Message Description
WARNING – MBC –
ROTATION MODE OFF
During the time the MBC Rotation Mode is commanded ON by the
microboard via serial comms this warning is set if the MBC reports
Rotation Mode is OFF by serial comms. This warning is inhibited if MBC
communication is not initiated and during the first 15 seconds after
the Rotation Mode is commanded ON. This warning is released when
Rotation Mode status matches the microboard command to the MBC.
WARNING – MOTOR –
HIGH CURRENT LIMIT
The chiller motor current is greater than or equal to the Motor Overload
current limit. The Motor Overload current limit is predetermined
from the motor model and Maximum VSD Output Current. While this
condition is in effect, chiller capacity control is in override to reduce
current. Normal LCHLT capacity control operation is resumed and this
message automatically clears when the motor current decreases below
this limit.
WARNING – MOTOR
– HIGH HOUSING
TEMPERATURE
The Motor Housing Temperature is greater than or equal to 167°F
(75°C). This warning is released when Motor Housing Temperature is
less than 158°F (70°C).
WARNING - MOTOR
- HIGH ROTOR
TEMPERATURE
This warning occurs when the estimated rotor temperatures exceeds
230°F (110°C) for 3 continuous seconds. This warning will automatically
clear when all winding temperatures decrease below the warning
threshold
WARNING - MOTOR
– HIGH WINDING
TEMPERATURE
This warning occurs when any of the enabled motor winding
temperatures exceeds 275°F (135°C) for 3 continuous seconds. This
warning will automatically clear when all winding temperatures
decrease below the warning threshold. Also it will not act on any
individual winding temperature sensor that has been disabled with the
TEMPERATURE DISABLED Setpoint on the Motor Details Screen.
WARNING – REAL TIME
CLOCK FAILURE
During the initialization process that occurs when power is applied
to the control center, test data is written to a location in the BRAM
battery backed memory device (IC location U52 on Microboard). This
data is then read from the BRAM and compared to the test data. If the
read data is not the same as that which was written to the device, it
is assumed the BRAM and Real time Clock operation is defective and
this message is displayed. The BRAM should be replaced by a qualified
service technician. This message automatically clears when the BRAM
problem has been solved.
WARNING – SETPOINT
OVERRIDE
A blank BRAM battery-backed memory device (IC location U52 on
Microboard) or a failure of this device was detected during the
initialization process that occurs when power is applied to the control
center. Due to this failure, any or all of the programmed Setpoints
could have been corrupted. Therefore, all Setpoints have been
automatically changed to their Default values. All Setpoints will have to
be programmed to their desired values. This message will clear when
the WARNING RESET key is pressed in OPERATOR (or higher) access
mode.
YMC
2
Mod B with OptiView
™
Control Center
112
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