Installation and Maintenance Manual

Diagnostics
RLC-SVX09H-EN 195
Power Loss - Compressor
1A
*Circuit Immediate
Non
Latch
All compressor running
modes
[all compressor
starting and non-
running modes]
The compressor had previously established
currents while running and then
all three phases
of current were lost. Design: Less than 10% RLA,
trip in 2.64 seconds. This diagnostic will preclude
the Phase Loss Diagnostic and the Transition
Complete Input Opened Diagnostic from being
called out. To prevent this diagnostic from
occurring with the intended disconnect of main
power, the minimum time to trip must be greater
than the guaranteed reset time of the Starter
module. Note: This diagnostic prevents nuisance
latching diagnostics due to a momentary power
loss – It does not protect motor (compressor from
uncontrolled power reapplication. See Momentary
Power Loss Diagnostic for this protection. This
diagnostic is not active during the start mode
before the transition complete input is proven.
Thus a random power loss during a start would
result in either a “Starter Fault Type 3” or a
“Starter Did Not Transition” latching diagnostic.
Remote
Power Loss - Compressor
2A
*Circuit Immediate
Non
Latch
All compressor running
modes
[all compressor
starting and non-
running modes]
The compressor had previously established
currents while running and then
all three phases
of current were lost. Design: Less than 10% RLA,
trip in 2.64 seconds. This diagnostic will preclude
the Phase Loss Diagnostic and the Transition
Complete Input Opened Diagnostic from being
called out. To prevent this diagnostic from
occurring with the intended disconnect of main
power, the minimum time to trip must be greater
than the guaranteed reset time of the Starter
module.
Remote
Severe Current
Imbalance - Compressor
1A
Circuit Immediate Latch All Running Modes
A 30% Current Imbalance has been detected on
one phase relative to the average of all 3 phases
for 90 continuous seconds.
Local
Severe Current
Imbalance - Compressor
2A
Circuit Immediate Latch All Running Modes
A 30% Current Imbalance has been detected on
one phase relative to the average of all 3 phases
for 90 continuous seconds
Local
Starter 1A Dry Run Test *Circuit Immediate Latch Starter Dry Run Mode
While in the Starter Dry Run Mode either 50% Line
Voltage was sensed at the Potential Transformers
or 10% RLA Current was sensed at the Current
Transformers.
Local
Starter 2A Dry Run Test *Circuit Immediate Latch Starter Dry Run Mode
While in the Starter Dry Run Mode either 50% Line
Voltage was sensed at the Potential Transformers
or 10% RLA Current was sensed at the Current
Transformers.
Local
Starter Contactor
Interrupt Failure -
Compressor 1A
Chiller
Special
Action
Latch
Starter Contactor not
Energized [Starter
Contactor Energized]
Detected compressor currents greater than 10%
RLA on any or all phases when the compressor was
commanded off. Detection time shall be 5 second
minimum and 10 seconds maximum. On detection
and until the controller is manually reset:
generate diagnostic, energize the appropriate
alarm relay, continue to energize the Evap Pump
Output, continue to command the affected
compressor off, fully unload the effected
compressor and command a normal stop to all
other compressors. For as long as current
continues, perform liquid level, oil return, and fan
control on the circuit effected.
Local
Table 133. Starter Diagnostics
Diagnostic Name and
Source
Affects
Target Severity
Persist
ence
Active Modes
[Inactive Modes] Criteria
Reset
Level