Installation and Maintenance Manual

Diagnostics
208 RLC-SVX09H-EN
Communication Diagnostics
Notes:
1. The following communication loss diagnostics will not
occur unless that input or output is required to be
present by the particular configuration and installed
options for the chiller.
2. Communication diagnostics (with the exception of
“Excessive Loss of Comm” are named by the
Functional Name of the input or output that is no
longer being heard from by the Main Processor. Many
LLIDs, such as the Quad Relay LLID, have more than
one functional output associated with it. A comm loss
with such a multiple function board, will generate
multiple diagnostics. Refer to the Chiller's wiring
diagrams to relate the occurrence of multiple
communication diagnostics back to the physical LLID
boards that they have been assigned to (bound).
Starter Module
Memory Error Type 2 -
Starter 2A
Circuit Immediate Latch All
Checksum on EEPROM copy of the Starter LLID
configuration failed. Factory default values
used.
Local
Starter Panel High
Temperature Limit -
Compressor 1A
Circuit
Immediate
and Special
Action
Non Latch All
Starter Panel High Limit Thermostat (170?F)
trip was detected. Compressor 1A is shutdown
and inoperative until the thermostat resets.
Note: Other diagnostics that may occur as an
expected consequence of the Panel High Temp
Limit trip will be suppressed from annunciation.
These include Momentary Power Loss, Phase
Loss, Power Loss, and Transition Complete
Input for Compressor 1A.
Local
Suction Refrigerant
Pressure Transducer –
Circuit 1
Circuit Immediate Latch All Bad Sensor or LLID Remote
Suction Refrigerant
Pressure Transducer –
Circuit 2
Circuit Immediate Latch All Bad Sensor or LLID Remote
Unexpected Starter
Shutdown
Circuit Normal Non latch
All Cprsr Running
modes, Starting,
Running and
Preparing to
Shutdown
The Starter module status reported back that it
is stopped when the MP thinks it should be
running and no Starter diagnostic exist. This
diagnostic will be logged in the active buffer
and then automatically cleared. This diagnostic
could be caused by intermittent communication
problems from the Starter to the MP, or due to
misbinding.
NA
Very Low Evaporator
Refrigerant Pressure –
Circuit 1
Chiller Immediate Latch
All
[compressor or
circuit in manual
lockout]
The respective circuit’s evaporator pressure
dropped below 80% of the current Low Evap
Refrig Press Cutout setting (see above) or 8
psia, whichever is less, regardless of the
running state of the circuit’s compressor. If a
given compressor or circuit is locked out, the
suction pressure transducer(s) associated with
it, will be excluded from causing this diagnostic.
Local
Very Low Evaporator
Refrigerant Pressure –
Circuit 2
Chiller Immediate Latch
All
[compressor or
circuit in manual
lockout]
The respective circuit’s evaporator pressure
dropped below 80% of the current Low Evap
Refrig Press Cutout setting (see above) or 8
psia, whichever is less, regardless of the
running state of the circuit’s compressor. If a
given compressor or circuit is locked out, the
suction pressure transducer(s) associated with
it, will be excluded from causing this diagnostic.
Local
Table 134. Main Processor Diagnostics (continued)
Diagnostic Name
Affects
Target Severity Persistence
Active Modes
[Inactive
Modes] Criteria
Reset
Level