Bell & Gossett S14334B Technologic 5500 Series Variable Primary Pump and Valve Controller - Manual (Page 31)

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5.9 Alternation
From the Technologic Pump Controller screen, shown
in section 3.2, press Alternation/4 to get to the Alter-
nation screen shown below.
Alternate ? (Y/N)
Press YES/7 and ENTER to alternate the sequence
of pump staging. The pump sequence is shown in
the Active Values Seq screen shown in section 5.1.9.
Press NO/0 and ENTER to return to the Technologic
Pump Controller screen without alternating.
Note: Alternation can also be accomplished automat -
ically. See section 4.3.4.
5.10 Alarms
When the controller detects an alarm condition, the
display will flash *ALARM* in the lower left corner of
the main screen.
The green LED on the HELP key will also flash during
an alarm condition. Press the HELP key for addi-
tional information on the alarm(s). If there are more
than one alarm the alarms will be listed in order of
occurrence.
To view possible causes for alarms press the HELP
key again after the alarm is displayed.
Refer to table Table 35 below for an overview of the
possible alarms and their respective causes.
Press the CLEAR key to return to the main screen.
Pressing RESET may be required to re-start the
system.
The controller logs alarms as they occur to aid in
troubleshooting unobserved alarms. Refer to Section
5.13 for alarm logging information.
HELP HELP/HELP DETAILED DESCRIPTION
SCREEN SCREEN DISPLAY
ALARM
AFD failure Check H-O-A switch, The controller is not receiving a closed run signal from AFD number X after it
wiring, and AFDs LED has been given a start command
Battery Empty Check battery's voltage Check for less then a 3V charge on the battery, check battery connection
and its continuity
High Level Check setting of level Check for open or closed contacts, refer to wire diagram for proper connection
switch
Low Level Check setting of level Check for open or closed contacts, refer to wire diagram for proper connection
switch
Overload Fail Check amp draw, Use On Systems with Bell & Gossett bypasses the controller is not receiving a
manual reset if it's OK digital input from the pump number X starter confirming that it has closed
Pump Fail Check DP switch, The controller is receiving a closed signal from the differential pressure switch
impeller, coupler, motor for pump number X after it has been given a start command
Sensor Fail Check wiring, piping, The controller is not receiving the proper 4-20mA signal from zone number
polarity, continuity X transmitter
Iso Vlv Fail Check wiring, continuity This alarm is only available if “Monitor Valve” or “Control Valve” is set to “Y”
in section 4.6.3. The controller will not start the corresponding pump if its
isolation valve is closed. In ganged pump systems, only one isolation valve
needs to be open to run the pumps.
Table 35: Alarm Messages