Compressor Status
Description
Trigger Method
Troubleshooting
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Verify the solenoid actuators. Refer to Section 4.6.3 Solenoid Verification on page 73.
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Verify the Serial Driver. Refer to Section 4.26.3 Serial Driver Verification on page 217.
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Review the fault log for actual Inverter temperature and other conditions that are
recorded at the time of fault.
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The Inverter requires replacement if the embedded temperature sensor is determined
faulty.
High Discharge
Temperature Fault
AFT
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Suggests insufficient charge (i.e., low gas), the condenser temperature has increased,
check valve has failed to open or the compressor has been running in surge condition
for an extended period of time.
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Check the chiller gas charge, entering condenser air/water conditions and operational
settings.
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Verify check valve opens during compressor operation.
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Verify the discharge pressure/temperature sensor. Refer to Section 4.32.3
Pressure/Temperature Sensor Verification on page 246.
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Review the fault log for actual discharge temperature and other conditions that are
recorded at the time of fault.
Low Suction Pressure
Fault
DFT
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Suggests insufficient charge, insufficient system load, or a sudden drop in evaporator
entering air/water temperature or flow.
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Check the charge, system load and entering air/water conditions.
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Review the fault log for actual suction pressure and other conditions that are recorded at
the time of fault.
High Discharge
Pressure Fault
AFT
Consequence:
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Results in an Instantaneous Lock-Out Fault - pre-CC4.0.0
Recommendation:
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Suggests the condenser may be faulty or insufficient air/water flow.
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Check the condenser and air/water flow.
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Review the fault log for actual discharge pressure and other conditions that are recorded
at the time of fault.
3-Phase Over-Current
Fault
AFT
Consequence:
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During startup mode, all alarms are ignored by the control system, but faults are not.
Therefore, when the FLA current (3-Phase Alarm Limit) is reached, the compressor will
continue to accelerate if startup requirements are not satisfied. After Startup is
complete, alarms will slow the compressor speed. Results in an Instantaneous Lock Out
Fault - pre-CC4.0.0.
Requires a power cycle to reset.
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Indicates the compressor is drawing current greater than the 3-Phase Current Fault
Limit.
Recommendation:
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Review the fault log for recorded 3-Phase Current level, demand, entering air/water
temperature (if available) and other conditions that are recorded at the time of fault.
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Usual causes are start speed set too high , minimum pressure ratio set too high at start-
up, power control integral (loop) gain set too high. Can also be related to sudden
increase in load/demand or system changes.
High Cavity
Temperature Fault
AFT
Consequence
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Indicates the motor cooling is insufficient.
CAUTION:
Repeated occurrences of this fault can result in shaft demagnetization or Back EMF is low
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Содержание Turbocor TT Series
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