Bacharach The Informant2, Operation And Maintenance Manual

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The Informant™ 2
0019-9211 Rev 9 15
3.5. Probe Assembly or Fan Replacement
Replace the probe assembly or fan as follows (see Figures 5 thru 8):
Material Required:
• Probe Assembly or Fan (refer to Section Replacement Parts )
• #1 Phillips screwdriver
• Medium flat blade screwdriver
Procedure:
1. Turn OFF detector; then remove the battery door and batteries.
2. Unscrew probe tip and lay aside.
3. Using a medium flat-blade screwdriver, first pry off the front retaining
collar as shown in Figure 6. Then, remove the two case screws and
pull the case halves apart.
4. Unplug both the probe and fan connectors from the printed circuit
board, being very careful not to damage the pins on the
connector
; then remove the probe assembly from the detector.
5. Remove fan from probe assembly by removing its three screws as
shown in Figure 7.
6. Depending on whether the fan or probe assembly is being replaced,
perform one of the following:
a. If the fan is being replaced — Discard the old fan and install a
new one using the screws removed in Step 5.
b. If the probe assembly is being replaced — Install the old fan onto
the new probe using the screws removed in Step 5. Also, install
the sensor from the old probe assembly into the replacement
probe assembly per the previous Section
Sensor Replacement .
7. Plug both the probe and fan connectors onto their respective header
holes on the printed circuit board as shown in Figure 8.
8. Position the probe assembly between the two case halves, routing
the fan wires through the notches in the case as shown in Figure 8.
Then reassemble the case; push on the front retaining collar; screw
on the probe tip; and reinstall the batteries.