HME system 20 drive-thru timer system operations manual.pdf
HME system 20 drive-thru timer system operations manual.pdf
HME system 20 drive-thru timer system operations manual.pdf
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5. Low Battery Condition:<br />
When the battery power in the System <strong>20</strong>A control unit<br />
is low, a LOW BATTERY message will appear on the data<br />
display. If this happens, change the battery as follows.<br />
LOW BATTERY<br />
WARNING: Do not unplug the unit from the electrical<br />
outlet, or all data may be lost.<br />
CAUTION: Handle the battery with a clean cloth or<br />
clean hands. Do not get grease or body<br />
oil on the battery or its contacts.<br />
❑ Remove the front cover from the control unit by pushing<br />
down on the two release clips on the top of the unit, and<br />
carefully pulling out on the cover.<br />
❑ Note the positions and orientation of the connectors on<br />
the three cables at the bottom of the circuit board inside<br />
the control unit. Disconnect the three cables and set the<br />
cover aside.<br />
❑ Locate the battery near the upper, left corner of the<br />
circuit board. (See Figure 14)<br />
❑ If there are tie wraps over the battery, cut and remove<br />
them. They were used to hold it in place for shipping,<br />
and will not need to be replaced.<br />
❑ Very carefully, pull the metal clip (See Figure 15) up<br />
slightly from the battery, just enough to remove the<br />
battery from under the clip.<br />
❑ Place your fingernail under the ridge on<br />
the left side of the battery (See Figure 15)<br />
and lift it out of the control unit.<br />
CAUTION: Do not pull the metal clip too far<br />
back. If it bends, it may not reconnect<br />
with the battery.<br />
❑ Replace the battery with a Duracell DL2450<br />
battery, or equivalent 3 volt battery. Very<br />
carefully slide it in place under the metal clip.<br />
NOTE: Be certain the battery is inserted with the<br />
positive (+) side up (the side with the<br />
writing on it).<br />
❑ Reconnect the three cables on the inside of the cover in<br />
the same positions and orientation as they were previously<br />
connected to the circuit board. Replace the cover on the<br />
control unit by aligning the tabs on the bottom of the cover<br />
in the slots on the bottom of the unit, and pressing it in at<br />
the top until the two release clips on the top of the cover<br />
snap securely in place.<br />
Ridge on<br />
left side<br />
of battery<br />
Metal clip<br />
Battery<br />
Figure 14.<br />
Battery location inside<br />
System <strong>20</strong>A control unit<br />
Figure 15.<br />
System <strong>20</strong>A battery<br />
42
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