AM Series Cascade Sequencer User Manual
OMM-0101_0D
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
25
of
28
GF-146-CS
Ph.: 800-526-0288
04/29/2016
2.6 Troubleshooting Guide
Below is a list of possible issues and corrective actions.
Cascade Sequencer Troubleshooting Guide
ISSUE
CORRECTIVE ACTION
Cannot set the unit address
when installing cascade
sequencer
OR
When trying to set the unit
address, the new address
does not appear on the
cascade sequencer.
•
Double check all wiring.
•
Ensure settings and switches are correct as per Figure 1-18.
•
Contact AERCO Customer Service.
Cascade system does not
seem to be communicating
correctly.
•
Double check all wiring.
•
Ensure settings and switches are correct as per Figure 1-18.
•
Make sure that all units show up under the Cascade Status
menu.
When trying to set the unit
address, “#5” appears on all
units.
This may indicate incorrect software in the communications
module. Contact AERCO technical support for further
information.
Domestic water heating tank is
not reacting quickly.
Check that the parameters are all set according to the “Water
Heater Settings”.
System loop is not reaching
desired setpoint.
•
Check the location of the cascade header temperature
sensor. Ensure that the sensor is located such that it will
see flow from both the primary and secondary loops.
•
Check parameters 1120-1123 on each unit. Ensure that all
modules are running at maximum capacity. If not, wait 10
minutes for burners to modulate up and check again.
•
Check each unit’s outlet temperature on the individual boiler
or water heater interface. If Cascade Se Max Offset
Up is less than or equal to any individual unit’s outlet
temperature, increase the Max Offset Up parameter.
Outdoor air temperature
sensor on cascade sequencer
shows “-40”.
•
Check that the sensor is wired to terminals 14 & 15 of the
master boiler.
•
Make sure all electrical connections are tight.
•
Check sensor resistivity.
Cascade sequencer header
temperature displays a low
value (10-16°F).
Check that the cascade header temperature sensor is
installed in terminals 24 & 25 of the master boiler or water
heater.
Err 116 on boiler/water heater or
other fault on Cascade
Sequencer that will not clear.
Ensure the boiler will operate without faults when not connected to
the Cascade Sequencer. Only then should the Sequencer be
installed.
