Emerson CPC ISIS, Installation And Configuration Manual

8 • Maintenance

026-1306 Rev 0 12-04-02

1.16. Maintenance

Use the following procedures to perform simple 

maintenance tasks on the ISIS controller.

1.16.1.Filter Maintenance

Following the construction phase, and then on a quar-

terly (minimum) basis, the air filter on the fan intake 
should be either:

• Replaced, or

• Cleaned

To clean or replace the air filter, remove the two 

screws that secure the intake grill. Lift the grill away from 
the unit and remove the filter. Clean the filter by washing 
it with warm, soapy water and thoroughly rinsing and dry-
ing it before replacing. Replace the filter, then fasten the 
intake grill securely.

Regular filter maintenance promotes cooler internal 

temperature and longer equipment life. If the ISIS has Nia-
gara Release 2.2 or higher, its main board temperature 
under the CPU (and other internal variables) can be moni-
tored by the station running on it. 

1.16.2.Real-Time Clock Battery

The Central Processor Card of the ISIS is equipped 

with a 3.0VDC Lithium battery. The battery provides 
back-up power to the Real-Time Clock and the CMOS 
data area that stores the BIOS setup information. The 
design life of the battery is 10 years. Replacement of the 
battery requires removal of the Central Processor Card and 
re-entry of the setup information.

1.17. Replacement Parts

Servicing the ISIS may call for replacement parts. 

There are three categories of parts: 

• Non-replaceable

• Standard Replacement

• Field Replacement

1.18. Non-Replaceable Parts

Other than the parts listed in the replacement parts 

section, there are no serviceable components on an ISIS.

1.18.1.Memory

Any addition, modification, or replacement of mem-

ory components requires software configuration and is not 
a field upgrade. 

1.18.2.Fuses

An internal 5 

x

 20 mm, Slo-Blo fuse rated at 1.25A, 

250VAC (domestic) or 0.75A, 250VAC (international) is 
used for power circuit protection. This circuitry is not 
user-serviceable. If the power circuitry is suspect, contact 
the factory for replacement (field replacement will void 
the ISIS warranty).

NOTE: Alternately, after the construction 
phase is complete, you can remove the ISIS 
air filter. This is recommended only for 
installations with a high exposure to heat 

(average temperature close to 95ºF (35ºC), and where 
the ISIS environment remains continuously clean.

NOTE: Consult with CPC before changing 

the battery in the ISIS. 

NOTE: For all replacement part numbers, 
contact CPC at 1-800-829-2724.

NOTE: For additional information on modi-
fying the memory capacity of the ISIS, con-
sult CPC for technical support at 1-800-829-
2724.