Sensor Failure Diagnostics - Trane CGAM Installation & Operation Manual

Diagnostics
Table 78. Main processor diagnostics (continued)
Very Low Suction Pressure – Circuit 1
Very Low Suction Pressure – Circuit 1
Very Low Suct Press – Ckt 1
Very Low Suction Pressure – Circuit 2
Very Low Suction Pressure – Circuit 2
Very Low Suct Press – Ckt 2

Sensor Failure Diagnostics

Notes:
1. The following sensor failure diagnostics will not occur
unless that input or output is required to be present by
the particular configuration and installed options for
the unit.
2. Sensor diagnostics are named by the Functional Name
of the input or output that is no longer sending a valid
Table 79. Sensor failure diagnostics
Diagnostic Name
Discharge Pressure Transducer
Discharge Pressure Transducer
Discharge Pressure Xdcr
Discharge Temperature Sensor
Discharge Temperature Sensor
Discharge Temperature Sensor
Evaporator Entering Water Temp Sensor
Evaporator Entering Water Temp Sensor
Evap Ent Water Temp Sensor
Evaporator Leaving Water Temp Sensor
Evaporator Leaving Water Temp Sensor
Evap Leav Water Temp Sensor
Heat Recovery Entering Water Temp Sensor
Heat Recovery Entering Water Temp Sensor
HR Entering Wtr Temp Sensor
Heat Recovery Leaving Water Temp Sensor
Heat Recovery Leaving Water Temp Sensor
HR Leaving Wtr Temp Sensor
Outdoor Air Temp Sensor
Outdoor Air Temp Sensor
Outdoor Air Temp Sensor
Suction Pressure Transducer
Suction Pressure Transducer
Suction Pressure Xdcr
Suction Temperature Sensor
Suction Temperature Sensor
Suction Temperature Sensor
146
Chiller Immediate Latch
Chiller Immediate Latch
Persis-
Affects Severity tence
Circuit Immediate Latch
Circuit Immediate Latch
Chiller Normal Latch
Chiller Normal Latch
Heat Warning or
Latch
Recovery Normal
Heat
Warning Latch
Recovery
Chiller Normal Latch
Circuit Immediate Latch
Circuit Immediate Latch
The circuit's suction pressure dropped below
(Low Pressure Cutout Setpoint (kPa
absolute) * 0.5) regardless of whether or
not compressors are running on that circuit.
All
This diagnostic was created to prevent
[circuit in
compressor failures due to cross-binding by
manual lockout]
forcing an entire chiller shutdown. If a given
circuit is locked out, the suction pressure
transducer associated with it will be
excluded from causing this diagnostic.
The circuit's suction pressure dropped below
(Low Pressure Cutout Setpoint (kPa
absolute) * 0.5) regardless of whether or
not compressors are running on that circuit.
All
This diagnostic was created to prevent
[circuit in
compressor failures due to crossbinding by
manual lockout]
forcing an entire chiller shutdown. If a given
circuit is locked out, the suction pressure
transducer associated with it will be
excluded from causing this diagnostic.
value to the Main Processor, indicating a sensor failure.
Some LLIDs may have more than one functional output
associated with it. Refer to the unit's wiring diagrams
to relate the occurrence of such sensor failure
diagnostics back to the physical LLID boards that they
have been assigned to (bound).
Active Modes
[Inactive
Modes] Criteria
All Bad Sensor or LLID
All Bad Sensor or LLID
All Bad Sensor or LLID.
All Bad Sensor or LLID
Bad Sensor or LLID. Warning for
All Partial Heat Recovery. Normal
shutdown for Total Heat Recovery.
All Bad Sensor or LLID
All Bad Sensor or LLID.
All Bad Sensor or LLID
All Bad Sensor or LLID
Local
Local
Reset
Level
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
Remote
CG-SVX17E-EN