AERCO BMS 168 - Manual (Page 73)

H-3
Appendix H
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Table H2 Common Problems
Problem Possible Causes Solution
Boiler plant not started
by BMS • Outside air temperature
higher than system’s start
temperature
• System must be initialized
• Wiring between boilers and
BMS not correct
• Check outside air temperature and
system start temperature. System
start temperature should be higher
than outside air temperature for
boilers to run. See para. 4.3.3 and
4.3.5.
Initialize and test system (para. 5.5
and 5.6).
• Check wiring (Section 3)
Boiler not being
recognized by BMS with
Modular Control Box • Temperature controller is
not in Manual/Remote
mode
• Temperature controller’s
secure menu is not locked
• Boilers are not correctly
addressed
• Wiring between the BMS
and boilers is incorrect
Indoor sensor not installed
but value has been entered
under PROP BAND
• Check temperature controller. The
REM and MAN lights should be
illuminated. If not, shut off AC
power to the boiler, wait 30 sec.,
and reapply power. The boiler will
automatically return to
remote/manual mode.
• Go to Secure menu in temperature
controller. It should display Secure
3. If the display shows Secure 4,
relock to Secure 4.
• See para. 5.4
• See Section 3 for correct wiring
connections
• If value has been entered under
PROP BAND, change value to
00/00° F
Boiler not being
recognized by BMS with
C-More Control Box
• C-More Box not configured
correctly.
• C-More Box not enabled.
Front panel switch is off.
• Incorrect wiring between
BMS and Boiler.
• Ensure that the C-More Boiler is
configured for Direct Drive and
PWM (see para. 5.5 of GF-109
(KC1000) or GF-110 (Benchmark)
for required menu settings.
• Check ON/OFF switch.
• See Section 3 for correct wiring
connections