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b
_
If the impedance is more than 3 KOhms:
-connect the connector between the sensing elements 17HF and 18HF
-disconnect the connector between the sensing element 19HF and the cable 20HF
-do a check of the impedance read on the LOOP CONTROLLER (9240SI) . if the impedance is less than 3 KOhms:
-disconnect the connector between the sensing elements 18HF and 19HF
-do a check of the impedance read on the LOOP CONTROLLER (9240SI).
* if the impedance is less than 3 KOhms:
-replace the OVHT SENS ELEMENT (18HF) (Ref. AMM TASK 36-22-17-000-001) and (Ref. AMM TASK 36-22-17-400-001)
-connect all the cables or connectors disconnected
-disconnect the LOOP CONTROLLER (9240SI) from the BMC1 connector
-install the BMC1 (1HA1) (Ref. AMM TASK 36-11-34-400-001)
-refer to Para. 4.B.
* if the impedance is more than 3 KOhms:
-replace the OVHT SENS ELEMENT (19HF) (Ref. AMM TASK 36-22-17-000-001) and (Ref. AMM TASK 36-22-17-400-001)
-connect all the cables or connectors disconnected
-disconnect the LOOP CONTROLLER (9240SI) from the BMC1 connector
-install the BMC1 (1HA1) (Ref. AMM TASK 36-11-34-400-001)
-refer to Para. 4.B.
. if the impedance is more than 3 KOhms
-replace the CABLE ASSY (20HF) (Ref. AMM TASK 36-22-17-000-001) and (Ref. AMM TASK 36-22-17-400-001)
-connect all the cables or connectors disconnected
-do a check of the impedance read on the LOOP CONTROLLER (9240SI)
* if the impedance is less than 3 KOhms:
-do a check and repair the wiring between the pin AA/8B of the BMC1 (1HA1) and the cable 20HF
-connect all the cables or connector disconnected
-disconnect the LOOP CONTROLLER (9240SI) from the BMC1 connector
-install the BMC1 (1HA1) (Ref. AMM TASK 36-11-34-400-001)
-refer to Para. 4.B.
* if the impedance is more than 3 KOhms:
-disconnect the LOOP CONTROLLER (9240SI) from the BMC1 connector
-install the BMC1 (1HA1) (Ref. AMM TASK 36-11-34-400-001)
-refer to Para. 4.B.
1
R -EFF : 001-049, 051-099, 101-149, 151-199,
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R **ON A/C 301-399,
R A. If the test gives the maintenance message:
R APU LOOP
R - remove the BMC1 (1HA1) (Ref. AMM TASK 36-11-34-000-001)
R - on the shelf 95VU, connect the LOOP CONTROLLER (9240SI) between the
R connector 1HA1-AA/7B and the ground (Ref. ASM 36-22/01)
R - do a check of the impedance read on the LOOP CONTROLLER (9240SI).
R (1) If the impedance is more than 3 KOhms:
R - disconnect the LOOP CONTROLLER (9240SI) from the BMC1 connector
R - replace the BMC-1 (1HA1) which is removed (Ref. AMM TASK 36-11-34-
R 000-001) and (Ref. AMM TASK 36-11-34-400-001).
R - refer to Para. 4.B.
R (2) If the impedance is less than 3 KOhms:
R - disconnect the LOOP CONTROLLER (9240SI) from the BMC1 connector
R - do a visual inspection of the sensing elements and cables on the
R APU loop.
R (a) If a sensing element or cable is damaged:
R - replace the sensing element or cable (Ref. AMM TASK 36-22-17-
R 000-001) and (Ref. AMM TASK 36-22-17-400-001)
R - disconnect the LOOP CONTROLLER (9240SI) from the BMC1 connector
R - install the BMC1 (Ref. AMM TASK 36-11-34-400-001)
R - refer to Para. 4.B.
R (b) If no sensing element is damaged:
R - disconnect the connector between the sensing elements 15HF and
R 16HF
R - connect the LOOP CONTROLLER (9240SI) between the connector
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