The Informant Refrigerant Leak Detector
18
Instruction
0019-9210
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
fl
at 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
fl
at-blade screwdriver,
fi
rst pry off the front retain-
ing 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 board
;
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 sen-
sor from the old probe assembly into the replacement probe assem-
bly — refer to Section
Sensor Replacement
.
7. Plug both the probe and fan connectors onto their respective header
pins on the printed circuit board as shown in Figure 8.
Maintenance
