TM 9-6150-226-13
Table 4-3.
UNIT TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
USER’S SINGLE-PHASE (120 V) EQUIPMENT WILL NOT OPERATE AND ALL PHASE
INDICATOR LIGHTS ARE ON.
WARNING
High voltage is present in this system.
DISE and PDISE
supports equipment using 120/208 V ac.
Disconnect power
before performing continuity checks.
Be careful not to
contact high-voltage connections when troubleshooting this
equipment.
Death or serious injury may result.
Step 1.
Step 2.
Step 3.
Use a multimeter and check for proper voltage at duplex
receptacle supporting user’s equipment.
(a) If proper voltage is present, advise user that his
equipment is faulty.
(b) If proper voltage is not present, go to step 2.
Check output voltage at source supporting user’s equipment.
(a) If proper voltage is present, sequentially check for proper
output voltage at each cable between last center and user’s
equipment.
Replace cable as necessary.
(b) If proper voltage is not present, go to step 3.
Check for proper output voltage at circuit breaker connected to
output connector supporting user’s load.
(a) If proper voltage is present, replace output connector
(refer to para 4-15).
(b) If proper voltage is not present, replace circuit breaker
(refer to para 4-14).
2.
USER’S SINGLE-PHASE (120 V) EQUIPMENT WILL NOT OPERATE AND PHASE INDICATOR
LIGHTS ARE OFF.
Step 1.
Use a multimeter and check for proper voltage at output
connector of center that is nearest to user’s load and has all
phase indicator lights on.
4-10
