AERCO C-More Controls Manual June 2010 - Manual (Page 137)

C-More Controller for Benchmark, Innovation & KC
USER MANUAL
04/22/14 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 Page 137 of 162
OMM-0032_0E Phone: 800-526-0288 GF-112
9.7 TROUBLESHOOTING
Faults which may occur during BST operation include the items listed below.
FAULT INDICATION PROBABLE CAUSE CORRECTIVE ACTION
OUTLET TEMPERATURE
display is flashing on 2 C-
More Control Panels 1. Two C-Mores have their
BST Mode menu option set
to BST Master
1. Check the BST Mode entries in the units
which have their displays flashing. Change
one of the BST Mode settings to BST Slave.
REMOTE LED on one or
more BST units is Off. 1. Improperly connected or
faulty RS485 Modbus
wiring.
2. Improper Comm address.
3. Unit Comm address is not
unique.
1. Check the polarity of the RS485 Comm
connections on the I/O board of the affected
unit. Also, ensure that all Modbus wiring
connections to the unit are secure.
2. Verify that the address of the affected unit is
within the allowable range (1 thru 8). The
address numbers do not have to be
sequential.
3. Check to ensure that none of the units have
the same Comm address.
Actuator-controlled
sequencing valve does not
open 1. Control cable not
connected to valve
actuator.
2. 24 VAC power not being
supplied to valve actuator.
3. Defective valve actuator.
1. Ensure that the control cable from the unit’s
I/O Box is connected to the valve actuator.
2. Remove the enclosure cover from the valve
actuator and verify that 24 VAC is present at
Terminal 2 of the actuator.
3. Replace valve actuator. Following
replacement, the actuator stroke will have to
be calibrated to ensure it fully opening and
closing.