WEB/CP-202-XPR AND WEB/CP-602-XPR CONTROLLERS
27 95-7775—01
MAINTAINING THE WEB/CP-202-XPR AND WEB/CP-602-XPR CONTROLLERS
This section provides information on the following topics:
• Cleaning
• Required NiMH Battery Maintenance
• Replacement Parts
• Replacing the WEB/CP-202-XPR or WEB/CP-602-XPR Controller
• Returning a Defective Unit
Cleaning
If dust or metal filings are present inside the unit, clean with vacuum or compressed air. Otherwise, no cleaning inside the unit is
required. Optionally, if the covers become dirty, you can wipe them with a damp cloth and mild detergent.
Required NiMH Battery Maintenance
NOTE: See NiMH Battery Precautions on page 6.
Battery life expectancy is a function of its discharge cycles (the number of discharges and their depth) and the ambient
temperature of the battery during normal operation. In most applications, the NiMH battery should see relatively few discharges.
Therefore, ambient temperature has more to do with determining the life expectancy of the battery than does any other factor. If
the controller is installed in a conditioned space, this battery should provide dependable service for approximately three years
(average). In an environment where the operating temperature is higher (that is, 50°C or 122°F), you should only expect the
battery to last approximately one year.
The NiMH battery in the controller is fully discharged when factory shipped. Additionally, NiMH batteries lose charge over time if
not kept trickle-charged (for more details, see NiMH battery pack on page 24). Therefore, even a new unit (or replacement
battery) will require up to 18 hours of powered operation before it can provide reliable backup power (is at full charge).
The controller monitors the NiMH battery and periodically loads the battery to test its ability to maintain battery-backed functions.
Investigate any battery trouble message, and check the battery connections to the unit. Replace the battery as required. To order
a new battery, see Standard Replacement Parts on page 29. See the next section, Replacing the NiMH Battery, for a
replacement procedure.
Replacing the NiMH Battery
The replacement NiMH battery is an assembly, that is a custom battery pack mounted on a bracket, with an attached cable and
connector plug (see Fig. 19 on page 28). To replace the battery, you must remove power to the unit and remove both covers.
Use only NiMH battery packs approved for use with the WEB/CP-202-XPR and WEB/CP-602-XPR controllers.
Replacing NiMH battery assembly in a WEB/CP-202-XPR or WEB/CP-602-XPR.
1. Backup the controller’s configuration to your PC using the appropriate Niagara
AX
software tool (for example, Workbench).
2. Remove all power from the controller, including disconnecting any sealed lead-acid battery. Wait for LED activity to stop—
after a couple of minutes, all LEDs on the unit should be off.
3. Remove both covers. See Removing and Replacing the Covers on page 8.
At this point you have access to the NiMH battery assembly (Fig. 19 on page 28).
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