Specifications

78
Table 90 — Time Guard Display Table
Table 91 — 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 energized. 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
“striking” alert will cause the circuit to shut down for 15 min-
utes. This feature reduces the likelihood of false alarms causing
a properly working system to be shutdown 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
circuit 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 minutes
with no detectable problems before the strike counter is reset to
zero.
All the alarms and alerts are summarized in Table 92.
ITEM EXPANSION RANGE UNITS POINT WRITE STATUS
TMGD TIMEGUARDS
TG.A1 Compressor A1 Timeguard CMPA1_TG
TG.A2 Compressor A2 Timeguard CMPA2_TG
TG.B1 Compressor B1 Timeguard CMPB1_TG
TG.B2 Compressor B2 Timeguard CMPB2_TG
TG.H1 Heat Relay 1 Timeguard HS1_TG
TG.H2 Heat Relay 2 Timeguard HS2_TG
TG.H3 Heat Relay 3 Timeguard HS3_TG
TG.H4 Heat Relay 4 Timeguard HS4_TG
TG.H5 Heat Relay 5 Timeguard HS5_TG
TG.H6 Heat Relay 6 Timeguard HS6_TG
ITEM EXPANSION RANGE UNITS POINT WRITE STATUS
VERS SOFTWARE VERSION NUMBERS
MBB CESR131343-xx-xx string
ECB1 CESR131249-xx-xx string
ECB2 CESR131249-xx-xx string
SCB CESR131226-xx-xx string
CEM CESR131174-xx-xx string
MARQ CESR131171-xx-xx string
NAVI CESR130227-xx-xx string