Trane RTAC 150 Series

RTAC-SVX002A-EN 86
Diagnostics
Hex
Code
Diagnostic Name and
Source
Severity Persistence Criteria Reset Level
384 Evaporator Water Flow
Overdue
Normal NonLatch Evaporator water ow was not proven within 4.25 minutes (RTAC
Rev 20 and earlier) or 20 minutes (RTAC Rev 21) of the Chilled
water pump relay being energized. With SW Rev 170 and earlier,
the diagnostic will de-energize the Chilled Water Pump output. It
will be re-energized if the diagnostic clears with the return of ow
and the chiller will be allowed to restart normally (to accommodate
external control of pump) With SW Rev 18.0 and later, the pump
command status will not be effected. Note that this diagnostic will
not light the red diagnostic light on the EasyView display.
Remote
5C4 Excessive Loss of Comm Immediate Latch Loss of comm with 75% or more of the LLIDs congured for the
system has been detected. This diagnostic will suppress the callout
of all subsequent comm loss diagnostics. Check power supply(s)
and power disconnects - troubleshoot LLIDS buss using TechView
Remote
87 External Chilled Water
Setpoint
Info NonLatch 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
89 External Current Limit
Setpoint
Info NonLatch Same as External Chilled Water Setpoint Remote
1C6 High Differential Refrigerant
Pressure - Circuit 1
Normal Latch The system differential pressure for the respective circuit was above
275 Psid for 2 consecutive samples or more than 10 seconds.
Remote
1C7 High Differential Refrigerant
Pressure - Circuit 2
Normal Latch Same as High Differential Refrigerant Pressure - Circuit 1 Remote
584 High Evaporator Liquid Level
- Circuit 1
Normal Latch 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: 80% or more of bit count corresponding to +21.2 mm or
more liquid level for 80 minutes)
Remote
5B7 High Evaporator Liquid Level
- Circuit 2
Normal Latch Same as High Evaporator Liquid Level - Circuit 1 Remote
6B8 High Evaporator Refrigerant
Pressure
Immediate NonLatch The evaporator refrigerant pressure of either circuit has risen above
190 psig. The evaporator water pump relay will be de-energized to
stop the pump regardless of why the pump is running. The diagnostic
will auto reset and the pump will return to normal control when all
of the evaporator pressures fall below 185 psig. This diagnostic has
severity of Immediate because if an evaporator pressure reads high
without being invalid, the pump would be shut off but the chiller could
keep running. Evap water ow diagnostics are not active if the pump
is commanded off, only if the pump is commanded on but ow does
not occur as expected.
Remote
1DE High Oil Temperature -
Compressor 1A
Immediate Latch 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
1E0 High Oil Temperature -
Compressor 1B
Immediate Latch Same as High Oil Temperature - Compressor 1A Remote
1DD High Oil Temperature -
Compressor 2A
Immediate Latch Same as High Oil Temperature - Compressor 1A Remote
1DF High Oil Temperature -
Compressor 2B
Immediate Latch Same as High Oil Temperature - Compressor 1A Remote
F5 High Pressure Cutout -
Compressor 1A
Immediate Latch 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
F6 High Pressure Cutout -
Compressor 1B
Immediate Latch Same as High Pressure Cutout - Compressor 1A Local
BE High Pressure Cutout –
Compressor 2A
Immediate Latch Same as High Pressure Cutout - Compressor 1A Local
BF High Pressure Cutout –
Compressor 2B
Immediate Latch Same as High Pressure Cutout - Compressor 1A Local