Diagnostics
RTAC-SVX01J-EN 157
High Oil
Temperature -
Compressor 1A
Cprsr 1A Immediate Latch All
The respective oil temperature as supplied to the compressor,
exceeded 200 F for 2 consecutive samples or for over 10
seconds. Note: As part of the Compressor High Temperature
Limit Mode (aka Minimum Limit), the running compressor's
female load step will be forced loaded when its oil temperature
exceeds 190F and returned to normal control when the oil
temperature falls below 170 F.
Remote
High Oil
Temperature -
Compressor 2A
Cprsr 2A Immediate Latch All
The respective oil temperature as supplied to the compressor,
exceeded 200 F for 2 consecutive samples or for over 10
seconds. Note: As part of the Compressor High Temperature
Limit Mode (aka Minimum Limit), the running compressor's
female load step will be forced loaded when its oil temperature
exceeds 190F and returned to normal control when the oil
temperature falls below 170 F.
Remote
High Pressure
Cutout -
Compressor 1A
Circuit Immediate Latch All
A high pressure cutout was detected on Compressor 1A; trip at
315 ± 5 PSIG. Note: Other diagnostics that may occur as an
expected consequence of the HPC trip will be suppressed from
annunciation. These include Phase Loss, Power Loss, and
Transition Complete Input Open.
Local
High Pressure
Cutout -
Compressor 1B
Circuit Immediate Latch All
A high pressure cutout was detected on Compressor 1A; trip at
315 ± 5 PSIG. Note: Other diagnostics that may occur as an
expected consequence of the HPC trip will be suppressed from
annunciation. These include Phase Loss, Power Loss, and
Transition Complete Input Open.
Local
High Pressure
Cutout -
Compressor 2A
Circuit Immediate Latch All
A high pressure cutout was detected on Compressor 1A; trip at
315 ± 5 PSIG. Note: Other diagnostics that may occur as an
expected consequence of the HPC trip will be suppressed from
annunciation. These include Phase Loss, Power Loss, and
Transition Complete Input Open.
Local
High Pressure
Cutout -
Compressor 2B
Circuit Immediate Latch All
A high pressure cutout was detected on Compressor 1A; trip at
315 ± 5 PSIG. Note: Other diagnostics that may occur as an
expected consequence of the HPC trip will be suppressed from
annunciation. These include Phase Loss, Power Loss, and
Transition Complete Input Open.
Local
Intermediate Oil
Pressure Transducer
- Compressor 1A
Cprsr 1A Immediate Latch All Bad Sensor or LLID Remote
Intermediate Oil
Pressure Transducer
- Compressor 1B
Cprsr 1B Immediate Latch All Bad Sensor or LLID Remote
Intermediate Oil
Pressure Transducer
- Compressor 2A
Cprsr 2A Immediate Latch All Bad Sensor or LLID Remote
Intermediate Oil
Pressure Transducer
- Compressor 2B
Cprsr 2B Immediate Latch All Bad Sensor or LLID Remote
Low Chilled Water
Temp: Unit Off
Evap
Pump
Special
Mode
NonLatch
Unit in Stop Mode,
or in Auto Mode
and No Ckt(s)
Energzd
[Any Ckt Energzd]
The leaving Evaporator water temp. fell below the leaving water
temp cutout setting for 30 degree F seconds while the Chiller is
in the Stop mode, or in Auto mode with no compressors running.
Energize Evap Water pump Relay until diagnostic auto resets,
then return to normal evap pump control. Automatic reset
occurs when the temp rises 2 F (1.1 C) above the cutout setting
for 30 minutes.
Remote
Low Chilled Water
Temp: Unit On
Chiller
Immediate
and
Special
Mode
NonLatch
Any Ckt[s]
Energzd
[No Ckt(s)
Energzd]
The evaporator water temp. fell below the cutout setpoint for 30
degree F Seconds while the compressor was running. Automatic
reset occurs when the temperature rises 2 F (1.1 C) above the
cutout setting for 2 minutes. This diagnostic shall not de-
energize the Evaporator Water Pump Output.
Remote
Low Differential
Refrigerant Pressure
- Circuit 1
Circuit Immediate Latch Cprsr Energized
The system differential pressure for the respective circuit was
below 35 Psid for more than 2000 Psid-sec with either a 1 minute
(single cprsr circuit) or 2.5 minute (manifolded cprsr circuit)
ignore time from the start of the circuit.
Remote
Low Differential
Refrigerant Pressure
- Circuit 2
Circuit Immediate Latch Cprsr Energized
The system differential pressure for the respective circuit was
below 35 Psid for more than 2000 Psid-sec with either a 1 minute
(single cprsr circuit) or 2.5 minute (manifolded cprsr circuit)
ignore time from the start of the circuit.
Remote
Table 67. Main processor diagnostics (continued)
Diagnostic Name
Affects
Target Severity
Persist-
ence
Active Modes
[Inactive
Modes] Criteria
Reset
Level
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