R (1) If the circuit breaker is closed:
R - do a check for 115VAC at pin A/1 of the L ice detector (2DD1).

R (a) If there is 115VAC:
R - replace the DET-ICE, L (2DD1) (Ref. AMM TASK 30-81-31-000-001)
R and (Ref. AMM TASK 30-81-31-400-001).

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : 401-499, ∞∞30-81-00∞∞∞∞∞∞∞∞∞∞Page 204
 Aug 01/05 CES

R  (b) If there is no 115VAC: 
R  - do a check for a ground signal at pin A/7 of the L ice detector 
R  (2DD1): 
R  1_  If there is no ground signal:
R  - repair the wiring between pin A/7 of the L ice detector and 
R  the ground terminal (Ref. ASM 30-81/01). 
R  2_  If there is a ground signal:
R  - do a check of the wiring between pin A/1 of the L ice 
R  detector and the circuit breaker (4DD1). 
R  a_  If there is no continuity:
R  - repair the above wiring. 
R  b_  If there is continuity:
R  - replace the circuit breaker (4DD1). 
R  (2) If the circuit breaker is open: 
R  - close the circuit breaker. 
R  (a) If the circuit breaker trips: 
R  - replace the DET-ICE, L (2DD1). 
R  1_  If the fault continues:
R  - do a check for a short to ground at the wiring between pin 
R  A/1 of the L ice detector and the circuit breaker (4DD1). 
R  a_  If there is a short to ground:
R  - repair the related wiring. 
R  b_  If there is no short to ground:
R  - replace the C/B-ANTI ICE/ICE DET/L (4DD1). 
R  (b) If the circuit breaker stays closed and the fault continues: 
R  - replace the DET-ICE, L (2DD1). 
R  C. Do the operational test given in Para. 3.

R TASK 30-81-00-810-803

R Loss of the R Ice Detector
R 1. Possible Causes
_______________
R - DET-ICE, R (2DD2)
R - wiring between pin A/7 of the R ice detector and the ground terminal
R - wiring between pin A/1 of the R ice detector and the circuit breaker
R (4DD2)
R - C/B-ANTI ICE/ICE DET/R (4DD2)

R 2. Job Set-up Information

______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R  AMM  30-81-00-710-001  Operational Test of the Ice Detection System 
R  AMM  30-81-31-000-001  Removal of the Ice Detector (2DD1, 2DD2) 
R  AMM  30-81-31-400-001  Installation of the Ice Detector (2DD1, 2DD2) 
R  ASM  30-81/01 
R  3. Fault Confirmation__________________ 
R  A. Test 

R Do the operational test of the ice detection system (Ref. AMM TASK 30-81-R 00-710-001).
R 4. Fault Isolation
_______________
R A. Table of the circuit breakers used in this procedure:

R -------------------------------------------------------------------------------R PANEL DESIGNATION IDENT. LOCATION
R -------------------------------------------------------------------------------
R C/B NOT APPLICABLE

R B. If the test gives the maintenance message ICE DETECTOR 2:
R - do a check of the status of the circuit breaker (4DD2).

R (1) If the circuit breaker is closed:
R - do a check for 115VAC at pin A/1 of the R ice detector (2DD2).

R (a) If there is 115VAC:
R - replace the DET-ICE, R (2DD2) (Ref. AMM TASK 30-81-31-000-001)
R and (Ref. AMM TASK 30-81-31-400-001).

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : 401-499, ∞∞30-81-00∞∞∞∞∞∞∞∞∞∞Page 206
 Aug 01/05 CES

R  (b) If there is no 115VAC: 
R  - do a check for a ground signal at pin A/7 of the R ice detector 
R  (2DD2). 
R  1_  If there is no ground signal:
R  - repair the wiring between pin A/7 of the R ice detector and 
R  the ground terminal (Ref. ASM 30-81/01). 
R  2_  If there is a ground signal:
R  - do a check of the wiring between pin A/1 of the R ice 
R  detector and the circuit breaker (4DD2). 
R  a_  If there is no continuity:
　
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