ISOLATING 24vac SHORTS
Dampers not responding and THE
BMPLUS 3000 LED’s are off.
HVAC system not responding and
BMPLUS 3000 LED’s are off.
DETECTING 24vac SHORTS
Check HVAC & BMPlus system transformer supply voltage.
Check HVAC & BMPlus system 24vac transformer voltage, fuse & the BMPlusB
circuit breaker.
Check HVAC & BMPlus system wiring for shorts/miswiring.
Check HVAC system wiring for shorts/miswiring.
Check HVAC system wiring for proper connections.
Check HVAC thermostat for proper connections.
Refer to Technical Bulletin for correct Setup/Wiring/Dip Switch settings.
Check HVAC system wiring for proper connections.
Check HVAC system wiring for shorts/miswiring.
Check HVAC System.
Refer to Technical Bulletin for correct Setup/Wiring/Dip Switch settings.
SOLUTIONS
T R O U B L E S H O O T I N G
REFER TO THE DAMPER MOTOR TESTING PAGE 9
LED’s illuminate and HVAC system
functions normally but dampers do
not respond.
Check damper motor wiring for proper connections.
Check damper motor 24vac transformer voltage/fuse/BMPlus circuit breaker.
Check damper motor wiring for shorts/miswiring.
Refer to Technical Bulletin for correct Setup/Wiring.
F1 circuit breaker protects the
BMPlus 3000 and reacts to a short in
the damper motor or thermostat
component and field wiring.
CHECK YOUR WIRING
EWC Controls provides superior toll free Troubleshooting Support for the BMPlus 3000 when you are on the job site!
Call 1-800-446-3110 Monday - Friday 8am to 5pm EST
Otherwise call 1-732-446-3110 for information on the BMPlus 3000 and other ULTRA-ZONE products..
When calling for Technical Support, please have a multi-meter, pocket screwdriver, and wire cutter/stripper handy.
TECHNICAL SUPPORT
LED’s do not illuminate and HVAC
system does not respond.
LED’s are not responding properly
and HVAC system is malfunctioning.
LED’S are responding properly but
HVAC system is malfunctioning.
SYMPTOM
Disconnect the wire(s) from the ‘R’
terminals on the BMPlus 3000 thermostat
terminal blocks ,
and the
“M2/M4/M6’’ terminals
on the BMPlus 3000 damper
motor terminal blocks. Restore power. If the short is no longer present, Ohm
out the thermostat and damper field wiring for shorts/misconnections. Replace
or repair wires as necessary. Restore power. Module(s) will resume operation.
SOLUTIONS:
Remove 24vac power from BMPlus 3000 and allow circuit breaker to cool!
Find and repair short(s) in damper and/or thermostat field wiring. Restore 24 vac power.
If 24vac short has occurred, 24vac will be present at the
BMPlus 3000 Module
Input terminals R & C;
but 24vac will not be present at the
Thermostat R&C.
SYMPTOMS: Module(s) appear to be dead!
TESTING THERMOSTATS
Check to make sure that the thermostat Rc and Rh terminals are connected together, unless your application requires
separation of these circuits.
Use the (C) Common terminal provided at each thermostat terminal block to wire up full 24 vac hard-wired thermostats.
You should reference the (C) Common terminal when troubleshooting incoming thermostat demand signals, even if no wire is
connected there.
Make sure that you wire and configure your thermostats for the correct application. Most thermostats built today can be field
configured to operate as regular Heat/ Cool type or as Heat Pump type. Remember that you can use regular Heat/Cool
thermostats on the BMPlus 3000 for Heat Pump applications.
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362 E-Mail- [email protected]
16
