AERCO BMS II BOILER - Manual (Page 65)

TROUBLESHOOTING
5-3
Table 5-2 Common Problems
Problem Possible Causes Solution
Boiler plant not started
by BMS II
• BMS II not turned ON.
• Outside air temperature higher
than system’s start
temperature
• Configuration not correct.
• System must be initialized
• Wiring between boilers and
BMS II 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
BMS II.
• C-More Box not configured
correctly.
• C-More Box not enabled. Front
panel switch is off.
• Incorrect wiring between BMS
II 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 BMS II.
• BCM not configured correctly.
• 3-position switch on boiler not
in correct position.
• BCM Control is in alarm.
• Incorrect wiring between BMS
II 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.
BMS II controlling
boilers. EMS can see
BMS II, but cannot see
boilers.
• MODBUS PASS THRU not
enabled in BMS II.
• EMS communication response
time too short.
• See RS232 MENU (paragraph 3.6).
• Allow at least 2 seconds to receive
boiler information.