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25CG-SVU02B-E4
Table 5 - Main Processor Diagnostics
Diagnostic Name Effects Severity Persistence
Active
Modes
[Inactive
Modes]
Criteria
Reset
Level
MP: Reset Has Occurred Chiller Warning NonLatch All The main processor has successfully come out of a reset and
built its application. A reset may have been due to a power up,
installing new software or configuration. This diagnostic is
immediately and automatically cleared and thus can only be
seen in the historic diagnostic list.
NA
Low Pressure Cutout Circuit Immediate Latch Starting and
Running
[Stop, See
criteria]
The suction refrigerant pressure (gauge) fell below the given
threshold for the refrigerant installed:
• 0.7 bar for R22 and R407c
• 0.3 bar for R134a
• 1.0 bar for R410a
Local
High Motor Temp/Overload Cprsr Immediate Latch All • The High Motor Temperature or the Compressor Overload
switch remained open for more than 35 minutes.
• Five compressor fault diagnostics have occurred within the
last 210 minutes.
Local
Compressor Fault Cprsr Immediate NonLatch All The High Motor Temperature or the Compressor Overload
switch input is open.
Local
BAS Failed to Establish
Communication
Chiller Special NonLatch At power-up The BAS was setup as "installed" and the BAS did not
communicate with the MP within 15 minutes after power-up.
Remote
BAS Communication Lost Chiller Special NonLatch All The BAS was setup as "installed" at the MP and the Comm
3 LLID lost communications with the BAS for 15 continuous
minutes after it had been established. The chiller follows the
value of the Tracer Default Run Command which can be
previously written by Tracer and stored nonvolatilely by the MP
(either use local or shutdown).
Remote
External Chilled/Hot Water
Setpoint
Chiller Warning NonLatch All a. Function Not "Enabled": no diagnostics.
b. "Enabled ": Out-Of-Range Low or Hi or bad LLID, set
diagnostic, default CWS/HWS to next level of priority (e.g.
Front Panel SetPoint). This Warning diagnostic will automatically
reset if the input returns to the normal range.
Remote
External Demand Limit
Setpoint
Chiller Warning NonLatch All a. Function Not "Enabled": no diagnostics.
b. "Enabled ": Out-Of-Range Low or Hi or bad LLID, set
diagnostic, default DLS to next level of priority (e.g. Front Panel
SetPoint). This Warning diagnostic will automatically reset if the
input returns to the normal range.
Remote
Circuit Pumpdown
Terminated
Circuit Warning Latch Operational/
Service
Pumpdown
[All Except
Operational
and Service
Pumpdown]
Going below the low pressure setting + 0.2 bar shall terminate
Service Pumpdown. This indicates that the suction pressure of
circuit 1 or 2 did not go below the low pressure setting + 0.2
bar within 1 minute from the start of Service Pumpdown.
Remote
Chilled Water Flow (Entering
Water Temp)
Chiller Immediate Latch Any Ckt(s)
Energized
[No Ckt(s)
Energized]
The entering evaporator water temperature fell below the
leaving evaporator water temperature by more than 1.7°C for
37°C sec while at least 1 compressor was running.
Remote