Pack 1 Compressor Temperature Sensor / Compressor Overheat Sensor Disagree

TASK 21-61-00-810-843-A
Pack 1 Compressor Temperature Sensor / Compressor Overheat Sensor Disagree

1. Possible Causes

SENSOR-COMPRESSOR OVHT [15HH]
SENSOR-COMPRESSOR TEMPERATURE [12HH]
wiring
P1 CONTROLLER [7HH]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 21-61-00-710-001	Operational Test of the Pack Temperature-Control System
ASM 216104
AMM 21-61-11-000-001	Removal of the Compressor Outlet - Temperature Sensor
AMM 21-61-11-400-001	Installation of the Compressor Outlet - Temperature Sensor
AMM 21-61-12-000-001	Removal of the Compressor Overheat - Temperature Sensor
AMM 21-61-12-400-001	Installation of the Compressor Overheat - Temperature Sensor
AMM 21-61-34-000-001	Removal of the Pack Controller
AMM 21-61-34-400-001	Installation of the Pack Controller

3. Fault Confirmation
Subtask 21-61-00-710-129-A ** ON A/C NOT FOR ALL

A. Do the operational test of the pack temperature-control system AMM 21-61-00-710-001.

NOTE: If a fault is detected, the PC gives a fault code for shop maintenance in addition to the related CFDS message(s) (refer to TSM chapter 21-63-00, page block 301).

4. Fault Isolation
Subtask 21-61-00-810-158-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message P1 COMP TEMP/OVHT SENSOR DISAGREE:

replace the SENSOR-COMPRESSOR OVHT [15HH] AMM 21-61-12-000-001 and AMM 21-61-12-400-001.

(1) If the fault continues:

replace the SENSOR-COMPRESSOR TEMPERATURE [12HH] AMM 21-61-11-000-001 and AMM 21-61-11-400-001.

(2) If the fault continues:

do a check and repair the wiring ASM 216104 between:
SENSOR (15HH) connector A/C and PC 1 (7HH) connector AB/1C,
SENSOR (15HH) connector A/B and PC 1 (7HH) connector AB/1B,
SENSOR (15HH) connector A/A and PC 1 (7HH) connector AB/1A.

(3) If the fault continues:

do a check and repair the wiring ASM 216104 between:
SENSOR (12HH) connector A/C and PC 1 (7HH) connector AA/14C,
SENSOR (12HH) connector A/B and PC 1 (7HH) connector AA/14D,
SENSOR (12HH) connector A/A and PC 1 (7HH) connector AA/15A,

(4) If the fault continues:

replace the P1 CONTROLLER [7HH] AMM 21-61-34-000-001 and AMM 21-61-34-400-001.

Subtask 21-61-00-710-130-A ** ON A/C NOT FOR ALL

B. Do the test as given in the Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:24:55 UTC