TM 1-1520-238-T-6
9–446
9–192. ECS ICE DET HTR CIRCUIT BREAKER (CB212) – DOES NOT STAY CLOSED
9–192
OR 115 VAC IS NOT PRESENT AT P1-9
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
One person to assist
References:
TM 1-1520-238-23
TM 1-1520-238-T-8
WARNING
Turn off power before detaching or
attaching wires and connectors. High
current 28 VDC or 115 VAC is present.
Failure to do so could result in death or
serious injury.
1. On pilot ELEC PWR panel, set BATT/EXT PWR
switch to EXT PWR.
Does ECS ICE DET HTR circuit breaker
(CB212) stay closed?
YES
Go to step 2.
NO
Go to step 3.
2. Set BATT/EXT PWR switch to OFF. Check for
open between:
CB88-B1 and CB212-1,
CB212-2 and P1-9.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–189.
NO
Replace ECS ICE DET HTR
circuit breaker (CB212)
(TM 1-1520-238-23).
3. Set BATT/EXT PWR switch to OFF. Check for
short between P1-9 and ground.
Does short exist?
YES
Go to step 4.
NO
Refer to TM 1-1520-238-T-8 to
troubleshoot rotor blade de-ice.
4. Detach wire at CB212-2. Check for short
between P1-9 and ground.
Does short exist?
YES
Repair shorted wire.
Go to paragraph 9–189.
NO
Replace ECS ICE DET HTR
circuit breaker (CB212)
(TM 1-1520-238-23).
END OF TASK
