CPO-PC400-W/CPO-PC400-UW HVAC CONTROLLER
35
EN0B-0085 IE10 R0420
RING LED
The CPO-PC400-W/CPO-PC400-UW is built with a Ring LED to indicate the operational status of the controller.
When a controller restarts successfully, the Ring LED operates in the following pattern:
• Top half of the ring LED glows in red with high intensity.
• Two blinks with reduced delay between the blinks and subsequently stops glowing for a few milliseconds.
Note: * LED status does not change when MMI firmware is downloaded from the CPO Online tool to the controller.
Table 29. Ring LED and Controller status
Light Status
Green (Normal)
No Action Required
Yellow (Minor fault)
Need Action From User
Red (Major fault)
Urgently Need Action from User
Solid
N/A
Total communication failure
with one or more devices.
(Applicable only for IO
modules, MSTP devices, Panel
Bus devices, and Field Bus
devices.)
NOTE: It takes a few minutes
for the LED to indicate
MSTP status whereas
only a few seconds to
indicate IO status.
• Factory default
— No firmware is loaded
— No application
— No configuration
• Firmware failure
Breathing
Controller is working
properly.
N/A
N/A
Flashing
N/A
• Rate of MSTP or IO frames is
dropping.
• Controller is too busy and
almost no communication
with other devices.
NOTE: It takes a few minutes
for the LED to indicate
MSTP status whereas
only a few seconds to
indicate IO status.
• Controller application has
failed. (e.g.RACL or IO stops
running)
• Controller is booting up.
Rotating
Controller’s activity in
progress.
(e.g. downloading
application, I/O firmware,
Controller firmware)*
N/A
N/A