AERCO Control System (ACS)
CHAPTER 5
: Troubleshooting
11/22/2017
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, New York 10913
Page 83 of 139
OMM-0081_0F
Phone: 800-526-0288
GF-131
TABLE 5-2: Common Problems
Problem
Possible Causes
Solution
Boiler plant not started
by ACS
•
ACS not turned ON.
•
Outside air temperature higher
than system’s start
temperature
•
Configuration not correct.
•
System must be initialized
•
Wiring between boilers and
ACS not correct
•
Press ON/OFF button and ensure that
the LED lights
•
Check outside air temperature and
system start temperature. System start
temperature should be higher than
outside air temperature for boilers to
run. Check
SYS START TEMP
setting
in RELAY MENU (paragraph 3.11).
•
Check
SYS START OPTION
in RELAY
MENU. Load
START PCT
and
STOP
PCT
in CALIBRATION MENU
paragraphs 3.11, 3.12).
•
Initialize and test system (para. 4.7 and
4.8).
•
Check wiring. (See Chapter 2 &
Appendix E)
BMK or KC Boiler with
C-More Control Box not
being recognized by
ACS.
•
C-More Box not configured
correctly.
•
C-More Box not enabled. Front
panel switch is off.
•
Incorrect wiring between ACS
and Boiler.
•
Alarm condition present on C-
More Control Box.
•
Ensure that the C-More Boiler is
configured for Direct Drive (see
Chapter 5 of correct BMK or KC1000
O & M Manual for required menu
settings).
•
Check ON/OFF switch.
•
See Chapter 2 for correct wiring
connections
•
Clear alarm condition.
Modulex Boiler with
BCM Control not being
recognized by ACS.
•
BCM not configured correctly.
•
3-position switch on boiler not
in correct position.
•
BCM Control is in alarm.
•
Incorrect wiring between ACS
and BCM Control.
•
Ensure that last boiler has termination
activated (see GF-114, GF-115-C).
•
Ensure that the 3-position switch is in
the 0 (zero) position.
•
Clear alarm condition.
•
Refer to Chapter 2 for correct wiring
connections.
EMS cannot see ACS
•
Incorrect address
•
Incorrect Baud Rate
•
Faulty wiring between EMS
and ACS.
•
See RS232 MENU (paragraph 3.6).
•
See RS232 MENU (paragraph 3.6).
•
See Chapter 2. Check wiring polarity
and connections.
Boiler RAMP UP or
RAMP DOWN too slow
or too fast
•
RAMP UP
or
RAMP DOWN
time needs adjustment.
•
PID requires adjustment.
•
Refer to CALIBRATION MENU
(paragraph 3.12) and check the
RAMP
UP %/MIN
or
RAMP DOWN %/MIN
•
Refer to TUNING MENU (para. 3.10).