Trane 4TWL9048A1000A - Breaker Trip Troubleshooting; Breaker Trip Procedure Flowchart; Electrical Safety Procedures

34
4TWL9048A-SF-1C-EN
Breaker Trip Procedure
No
Yes
Yes
Yes
No
No
No
No
No
Yes
C onnect F an
Yes
No
Yes
· Verify wiring
· Verify sensor readings
· Check breaker
· Check breaker size
· Check for GFCI on circuit
· Replace breaker if necessary
Yes No
No
Yes
·
·
·
·
+VDC -VDC
ELECTRICAL
HAZARD
Failure to follow this
warning could result in
personal injury or death.
WAIT TWO (2) MINUTES
after disconnecting power prior
to touching electrical
components as they may hold
a dangerous charge
of 400VDC, then verify DC
Voltage is less than 42 VDC
at inverter test points
labeled +VDC and -VDC before
servicing board.
400 VOLTS
WARNING
Breaker Trip Procedure
Immediate trip as
soon as breaker is
closed?
Disconnect OD fan
and close breaker
Run Drive
Diagnostic Test
Trip?
Trip?
Drive Test:
Passed?
Weak Breaker or
Drive Fault
Test Response 6:
No Fault Found
Go to Drive
Diagnostic Test
Flow Chart
Run OD Fan Test*
Fan Motor or
Connections or
Breaker
Trip?
Trip?
Run System at
100%
Replace Breaker
Investigate system issue
or weak breaker
Trip?
Tr ip?
Fan Motor or
Connection Failure
Weak Breaker
or Drive Fault
(99% chance drive)
Reconnect drive
without fan
Trip?
Verify Wiring
Check Breaker
Check breaker size
Replace breaker if necessary
Disconnect AC
Input from drive
and close breaker