RTHD-SVX02H-EN 111
Diagnostics
The following diagnostic Table contains all the diagnos-
tics possible. Not all data is available unless Trace TU is
installed.
Hex Code:
3 digit hexadecimal code used on all past
products to uniquely identify diagnostics.
Diagnostic Name and Source:
Name of diagnostic and
its source. Note that this is the exact text used in the
User Interface and/or Service Tool displays.
Severity:
Defines the severity of the above effect. Imme-
diate means immediate shutdown of the effected por-
tion, Normal means normal or friendly shutdown of the
effected portion, Special Mode means a special mode of
operation (limp along) is invoked, but without shutdown,
and Info means an Informational Note or Warning is gen-
erated.
Persistence:
Defines whether or not the diagnostic and
its effects are to be manually reset (Latched), or can be
either manually or automatically reset (Nonlatched).
Criteria:
Quantitatively defines the criteria used in gen-
erating the diagnostic and, if nonlatching, the criteria for
auto reset. If more explanation is necessary a hot link to
the Functional Specification is used.
Reset Level:
Defines the lowest level of manual diagnos-
tic reset command which can clear the diagnostic. The
manual diagnostic reset levels in order of
Priority are:
Local and Remote. A diagnostic that has a
reset level of Local, can only be reset by a local diagnos-
tic reset command, but not by the lower priority remote
Reset command whereas a diagnostic listed as Remote
reset can be reset by either.
Table 35. Diagnostics Table
Hex
Code
Diagnostic Name
and Source
Severity Persistence Criteria Reset
Level
3D8 At Speed Input
Opened
Immediate Latch The “At Speed” input was found to be opened with the compres-
sor motor running after successfully obtaining an at speed and
bypassed condition. This is active for solid state starters only
Local
3D6 At Speed Input
Shorted
Immediate Latch The “At Speed” input is shorted before the compressor was start-
ed. This is active for only solid state starters.
Local
398 BAS Communication
Lost
Special NonLatch The BAS was setup as “installed” at the MP and the Comm 3
llid lost communications with the BAS for 15 contiguous min-
utes after it had been established. Refer to Section on Setpoint
Arbitration to determine how setpoints and operating modes may
be effected by the comm loss. The chiller follows the value of the
Tracer Default Run Command which can be previously written
by Tracer and stored nonvolatilely by the MP (either use local or
shutdown).
Remote
390 BAS Failed to Estab-
lish Communication
Special NonLatch The BAS was setup as “installed” and the BAS did not commu-
nicate with the MP within 15 minutes after power-up. Refer to
Section on Setpoint Arbitration to determine how setpoints and
operating modes may be effected. Note: The original require-
ment for this was 2 minutes, but was implemented at 15 minutes
for RTAC.
Remote
2E6 Check Clock Info Latch The real time clock had detected loss of its oscillator at some
time in the past. Check / replace battery?
This diagnostic can be effectively cleared only by writing a new
value to the chiller’s time clock using the TechView or DynaView’s
“set chiller time” functions.
Remote
8A Evap Water Flow
(Entering Water
Temp)
Info NonLatch The entering evaporator water temp fell below the leaving evap-
orator water temp. by more than 2°F for 100 °F-sec. For falling
lm evaporators this diagnostic cannot reliably indicate loss of
ow, but can warn of improper ow direction through the evapo-
rator, misbound temperature sensors, or other system problems
Remote
5F8 Comm Loss:
Evaporator Water
Pump Relay
Info Latch Continual loss of communication between the MP and the Func-
tional ID has occurred for a 30 second period.
Remote
5EF Comm Loss:
Evaporator Water
Flow Switch
Immediate Latch Continual loss of communication between the MP and the Func-
tional ID has occurred for a 30 second period.
Remote
6B6 Comm Loss:
Compressor % RLA
Output
Info Latch Continual loss of communication between the MP and the Func-
tional ID has occurred for a 30 second period.
Remote
6B6 Comm Loss:
Cond Head Press
Cntrl Output
Info Latch Continual loss of communication between the MP and the Func-
tional ID has occurred for a 30 second period.
Remote
6B6 Comm Loss:
Condenser Entering
Water Temperature
Info and
Special Action
Latch Continual loss of communication between the MP and the Func-
tional ID has occurred for a 30 second period. If chiller running,
and condenser water regulating valve option installed, force valve
to 100% ow.
Remote
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