118
Table 100 — CCN/Linkage Display Table
Table 101 — Compressor Run Hours Display Table
Table 102 — Compressor Starts Display Table
Table 103 — Software Version Numbers Display Table
Alarms and Alerts
There are a variety of different alerts and alarms in the system.
P — Pre-Alert: Part of the unit is temporarily down. The alarm is
not broadcast on the CCN network. The alarm relay is not ener-
gized. After an allowable number of retries, if the function does
not recover, the pre-alert will be upgraded to an alert or an alarm.
T — Alert: Part of the unit is down, but the unit is still partially
able to provide cooling or heating.
A — Alarm: The unit is down and is unable to provide cooling
or heating.
All alarms are displayed with a code of AXXX where the A is
the category of alarm (Pre-Alert, Alert, or Alarm) and XXX is
the number.
The response of the control system to various alerts and alarms
depends on the seriousness of the particular alert or alarm. In
the mildest case, an alert does not affect the operation of the
unit in any manner. An alert can also cause a “strike.” A “strik-
ing” alert will cause the circuit to shut down for 15 minutes.
This feature reduces the likelihood of false alarms causing a
properly working system to be shut down incorrectly. If three
strikes occur before the circuit has an opportunity to show that
it can function properly, the circuit will strike out, causing the
shutdown alarm for that particular circuit. Once activated, the
shutdown alarm can only be cleared via an alarm reset.
Circuits with strikes are given an opportunity to reset their
strike counter to zero. As discussed above, a strike typically
causes the circuit to shut down. Fifteen minutes later, that cir-
cuit will once again be allowed to run. If the circuit is able to
run for 1 minute, its replacement circuit will be allowed to shut
down (if not required to run to satisfy requested stages). How-
ever, the “troubled” circuit must run continuously for 5 min-
utes with no detectable problems before the strike counter is re-
set to zero.
In addition, the compressors have several diagnostics monitor-
ing the safety of the system which may cause a number of at-
tempts to be re-tried before locking out the system from opera-
tion. This feature reduces the likelihood of false alarms causing
a properly working system to be shut down incorrectly.
For the compressor and circuit diagnostics, some of these
alerts/alarms will not broadcast an initial failure to the CCN
network until all attempts to recover have occurred and failed.
These alerts will be accessible in the alarm history of the con-
trol (Alarms
HIST).
All the alarms and alerts are summarized in Table 104.
ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS
LINK CCN - LINKAGE
MODE Linkage Active - CCN ON/OFF MODELINK
L.Z.T Linkage Zone Control Tmp dF LZT
L.C.SP Linkage Curr. Cool Setpt dF LCSP
L.H.SP Linkage Curr. Heat Setpt dF LHSP
ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS
HRS COMPRESSOR RUN HOURS
HR.A1 Compressor A1 Run Hours 0-999999 HRS HOURS_A1 config
HR.A2 Compressor A2 Run Hours 0-999999 HRS HOURS_A2 config
HR.A3 Compressor A3 Run Hours 0-999999 HRS HOURS_A3 config
HR.B1 Compressor B1 Run Hours 0-999999 HRS HOURS_B1 config
HR.B2 Compressor B2 Run Hours 0-999999 HRS HOURS_B2 config
HR.B3 Compressor B3 Run Hours 0-999999 HRS HOURS_B3 config
ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS
STRT COMPRESSOR STARTS
ST.A1 Compressor A1 Starts 0-999999 CY_A1 config
ST.A2 Compressor A2 Starts 0-999999 CY_A2 config
ST.A3 Compressor A3 Starts 0-999999 CY_A3 config
ST.B1 Compressor B1 Starts 0-999999 CY_B1 config
ST.B2 Compressor B2 Starts 0-999999 CY_B2 config
ST.B3 Compressor B3 Starts 0-999999 CY_B3 config
ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS
VERS SOFTWARE VERSION NUMBERS
MBB CESR131461-xx-xx string
RXB CESR131465-xx-xx string
EXB CESR131465-xx-xx string
CEM CESR131174-xx-xx string
CXB CESR131173-xx-xx string
SCB CESR131226-xx-xx string
VFD1 VERSION-313D string
VFD2 VERSION-313D string
MARQ CESR131171-xx-xx string
NAVI CESR130227-xx-xx string
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