Trane Tracer CH530 - Evaporator Level, Temperature, and Sensor Diagnostics

Main Processor Diagnostics
37RLC-SVU05A-E4
Diagnostic Name
Affects
Ta r g e t
Severity Persistence
Active Modes
[Inactive Modes]
Criteria Reset Level
High Evaporator
Liquid Level - Circuit
1 (early Phase 1
RTWD production
only - eliminated in
2nd Phase 1 release
in Sept 08)
Circuit Normal
Latch
Starter Contactor
Energized [all Stop
modes]
The liquid level sensor is seen to be at or near its high
end of range for 80 contiguous minutes while the
compressor is running. (The diagnostic timer will hold,
but not clear when the circuit is off). Design: approx
80% or more of bit count corresponding to +30 mm or
more liquid level for 80 minutes).
Remote
High Evaporator
Liquid Level - Circuit
2 (early Phase 1
RTWD production
only - eliminated in
2nd Phase 1 release
in Sept 08)
Circuit Normal
Latch
Starter Contactor
Energized [all Stop
modes]
The liquid level sensor is seen to be at or near its high
end of range for 80 contiguous minutes while the
compressor is running. (The diagnostic timer will hold,
but not clear when the circuit is off). Design: approx
80% or more of bit count corresponding to +30 mm or
more liquid level for 80 minutes).
Remote
External Chilled/Hot
Water Setpoint
None Info
Latch
All a. Function Not "Enabled": no diagnostics. b. "Enabled ":
Out-Of-Range Low or Hi or bad LLID, set diagnostic,
default CWS to next level of priority (e.g. Front Panel
SetPoint). This Info diagnostic will automatically reset if
the input returns to the normal range.
Remote
External Current
Limit Setpoint
None Info
Latch
All a. Not "Enabled": no diagnostics. b. "Enabled ": Out-Of-
Range Low or Hi or bad LLID, set diagnostic, default
CLS to next level of priority (e.g. Front Panel SetPoint.
This Info diagnostic will automatically reset if the input
returns to the normal range.
Remote
Evaporator Water
Flow (Entering
Water Temp)
None Info
Latch
Any Ckt(s) Energzd
[No Ckt(s) Energzd]
The entering evaporator water temp fell below the
leaving evaporator water temp by more than 2°F for
100°F-sec. For falling film evaporators, this diagnostic
cannot reliably indicate loss of flow, but can warn of
improper flow direction through the evaporator,
misbound water temperature sensors, improper sensor
installation, partially failed sensors, or other system
problems. Note that either entering or leaving water
temp sensor could be at fault.
Remote
Evaporator
Entering Water
Temperature
Sensor
Chiller Normal Latch All
Bad Sensor or LLID. Note: Entering Water Temp Sensor
is used in EXV pressure control as well as ice making so
it must cause a unit shutdown even if ice or CHW reset
is not installed.
Remote
Evaporator
Leaving Water
Temperature
Sensor
Chiller Normal Latch All Bad Sensor or LLID Remote
Condenser
Entering Water
Temperature
Sensor
Chiller
Info and
Special
Action
Latch All
RTWD only: Bad Sensor or LLID. If chiller running, and
condenser water regulating valve option installed,
force valve to 100% flow.
Remote
Condenser
Leaving Water
Temperature
Sensor
Chiller
Info and
Special
Action
Latch All
RTWD only: Bad Sensor or LLID. If Chiller is running
in the heat mode of operation - normal chiller
shutdown, otherwise, informational warning only.
Discontinue Min Capacity Limit forced cprsr loading
due to Low DP in subsequent startups.
Remote
Condenser
Refrigerant
Pressure
Transducer -
Circuit 1
Circuit Immediate Latch All Bad Sensor or LLID Remote
Condenser
Refrigerant
Pressure
Transducer -
Circuit 2
Circuit Immediate Latch All Bad Sensor or LLID Remote
Suction
Refrigerant
Pressure
Transducer -
Circuit 1
Circuit Immediate Latch All Bad Sensor or LLID Remote