Crystal Vision
Introduction
Indigo 2 CoolFlow User Manual R1.3
4
20/06/2012
Only one of the fans is essential in normal operation. If one of the fans should fail, the
closed frame can still operate indefinitely with an ambient temperature of 40 degrees.
Warning:
Although it is possible to operate the frame with the front panel open, the frame may not
meet electromagnetic compatibility (EMC) requirements in this condition.
The Indigo PSUs have a built-in processor, which communicates with the front panel
display processor (referred to as a PIC) and monitors power rail voltage levels (+5.75V and
-6.0 V). The PSUs also store their own serial number in non-volatile memory.
The panel processor regularly receives status updates from the PSU processors about power
rails. This allows the front panel to update its status LEDs and control the alarm changeover
relay. The relay contacts are available on Remote 2/4 connector on the rear of the frame.
There are five two-colour LEDs on an active or passive front panel, with yellow/green
indicating a normal condition and red an abnormal condition. If the LED is unlit, this
indicates an inactive condition such as a single PSU fitted or PSU fan not running with the
front panel closed. There is also a yellow comms LED that flashes when comms are
received.
The Indigo 2 CoolFlow status LEDs
The following LED status indications may be seen:
LED
Colour
Notes
Front Fan
Unlit
Green
Red
Door open
Normal operation
Change the panel fan
PSU Fan
Unlit
Green
Red
Door closed and fan idle
Door open and fan operational
Change PSU fan
Upper PSU
Unlit
Green
Red
No upper PSU detected
Normal operation
Change upper PSU
Lower PSU
Unlit
Green
Red
No lower PSU detected
Normal operation
Change lower PSU
Temp
Green
Red
Normal operation
Internal temperature too high(approx 65
o
C)
Comms
Unlit
Flash amber
Press Device in Statesman mode for comms
status
