Trane Tracer CH.530 RLC-SVU01B-E4 Owner's Manual page 45

Hex Diagnostic Name and
Code Source
194 Low Evaporator
Refrigerant
Temperature -
Circuit 1
195
Low Evaporator
Refrigerant
Temperature -
Circuit 2
6B3
Low Evaporator Temp
- Ckt 1: Unit Off
RLC-SVU01B-E4
Diagnostics
Severity Persistence
Immediate Latch
Immediate Latch
Special NonLatch
Mode
Criteria
a. The inferred Saturated
Evaporator Refrigerant
Temperature (calculated from
suction pressure transducer(s))
dropped below the Low
Refrigerant Temperature Cutout
Setpoint for 66.7°C-sec (4.4°C-
sec max rate) while the circuit
was running after the ignore
period had expired. The integral
is held at 0 for the ignore time
(which is a function of outdoor
air temperature) following the
circuit startup and the integral
will be limited to never trip in
less than 15 seconds. (i.e. the
error term shall be clamped to -
13.3°C. The minimum LRTC
setpoint is -20.5°C (1.3 bar) the
point at which oil separates
from the refrigerant. b. During
the timeout of the trip integral,
the unload solenoid(s) of the
running compressors on the
circuit, shall be energized
continuously. Normal
load/unload operation will be
resumed if the trip integral is
reset by return to temps above
the cutout setpoint.)
Same as Low Evaporator
Refrigerant Temperature -
Circuit 1
Any of the evaporator
saturated temperatures fell
below the water temperature
cutout setting while the
respective evaporator liquid
level was greater than -21.2mm
for 16.7°C seconds while chiller
is in the Stop mode, or in Auto
mode with no compressors
running. Energize Evaporator
Water Pump Relay until
diagnostic auto resets, then
return to normal evaporator
pump control. Automatic reset
occurs when either the
evaporator temperature rises
2°F (1.1°C) above the cutout
setting or the liquid level falls
below -21.2mm for 30 minutes.
Reset
Level
Remote
Remote
Remote
45