TM 5-3895-385-23-1
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Table 1. Screed Electric Heater Malfunction Troubleshooting Procedures -- Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
It will be necessary to follow wire from screed electric heat box connector to screed electric
heater elements to determine if connector is attached to a main screed electric heater element or
a screed extension electric heater element.
8. Screed electric heater element
1. Unplug each screed electric
malfunction.
heater element (WP 0447, Vol 3,
Figure 13).
2. Measure resistance (WP 0443,
1. If voltage reads between 26.5
Vol 3) from pin 1 to pin 2 on
and 29 Ohms on each main
each screed electric heater
screed electric heater element
element (WP 0447, Vol 3, Figure
and between 46.5 and 51.5
13).
Ohms on each screed extension
electric heater element, proceed
to next malfunction.
2. If voltage reads outside of 26.5
and 29 Ohms on any main
screed electric heater element
and between 46.5 and 51.5
Ohms on any screed extension
electric heater element, replace
affected screed electric heater
element (WP 0236, Vol 2) or
(WP 0242, Vol 2).
9. Breaker malfunction.
Measure continuity (WP 0443, Vol
1. If continuity is present on each
3) across the connection posts on
breaker, proceed to next
each breaker (WP 0447, Vol 3,
malfunction.
Figure 6).
2. If continuity is not present on
each breaker, replace
malfunctioning breaker (WP
0243, Vol 2).
10. Broken wire or loose
Check each wire and connection
Repair or replace faulty wire or
connection.
point in screed electric heat box for
connection.
proper contact and continuity (WP
0443, Vol 3).
11. No power to heater control box.
1. Access fuse box (WP 0277, Vol
2).
2. Measure continuity (WP 0443,
1. If continuity is present, proceed
Vol 3) across heat box fuse (WP
to next test.
0447, Vol 3, Figure 1).
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