MD Helicopters MD Explorer - Fault Isolation; Vent System Troubleshooting

CSP−900RMM−2MD Helicopters, Inc.
Rotorcraft Maintenance Manual
Page 101
Revision 24
21-20-00
VENT SYSTEM
FAULT ISOLATION
1. Vent System Troubleshooting
(Ref. Figure 101)
The following troubleshooting procedures are a
brief summary of vent system faults which
may be encountered (Ref. Table 101).
Troubleshooting tables should be used with
system schematics, electrical wiring diagrams,
serviceability checks and other detailed
procedures in this and other chapters of the
manual.
Comprehensive wiring diagrams are available
in the Rotorcraft Maintenance Manual
CSP-900RMM-3 (Ref. Section 98-40-00).
Table 101. Vent System Troubleshooting
Fault Probable Cause Corrective Action Ref. Section
Vent fan inoperative. Circuit Breaker VENT EVAP
(CB18) Open.
Replace or reset VENT EVAP
circuit breaker (CB18) as
required.
20−60−00
Faulty AC/VENT switch. Remove and replace vent
switch.
96−00−00
Open ground wire from
AC/Vent Fan switch to
GS 104−D ground stud.
Test and repair wiring. 20−60−00
Faulty K100 power relay. Remove and replace K100
power relay.
96−00−00
Faulty vent fan motor. Replace vent fan motor. 21−20−00
Faulty wiring. Test and repair wiring. 20−60−00