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MACS II User Manual
101796668 Revision E 95
Item Problem Cause Solution
1. MACS II unit does not power
up. No fan or controller
displays.
Main power inlet
and plug.
Check plug and
circuit breaker panel
for 230 volts
MACS II power
switch “off” at rear
of unit.
Turn “on” switch.
Circuit breaker “off”
at rear of unit.
Turn “on” breaker.
2. MACS II unit powers up, but
fan does not operate.
Remove panels to
gain access and
check connector
and wiring from fan
to terminal block.
Reconnect or
replace wiring.
Bad fan. Replace fan.
3. MACS II unit powers up, the
fan is “on”, but there is no
display on controller.
Check connector
and wiring from
controller to
terminal block.
Reconnect or
replace wiring.
Bad controller. Replace controller.
4. Communication error when
trying to connect.
USB cable(s) not
connected.
Close MACS II
program, reconnect
cables, wait ten
seconds, restart
program and
connect.
Possible problems
with internal
Edgeport
connectivity.
Inspect and verify
Edge-port
communication
ports are correct
with supplied
Edgeport
Configuration Utility
software.
Possible problem
with NI cDAQ-9172
connectivity.
Inspect and verify
NI cDAQ
communication
ports are correct
with supplied
measurement &
automation
software.