Mooney M20V - Page 158

MOONEY INTERNATIONAL CORPORATION
M20V SERVICE AND MAINTENANCE MANUAL
Page
Date
19
MAR 2017
Rev Date
D. Evaporator noisy
1. Wobbly blower wheel 1. Replace
2.Blower wheel hitting scroll 2. Align
3. Defective blower motor bearing 3. Replace motor
4. Loose mounting bracket 4. Tighten
5. Air inlet clogged 5. Remove
E. Compressor/Condenser Module
noisy
1. Loose drive belt 1. Re- tension
2. Drive belt hitting cover 2. Re- align belt & adjust brkts.
3. Motor hitting shroud 3. Adjust as necessary
4. Defective compressor 4. Replace
5. Defective drive pulley 5. Replace
6. Loose pulley 6. Tighten or replace
7. Loose mounting hardware 7. Tighten as necessary
8. Loose hose assembly 8. Secure as necessary
9. Loose fan blade 9. Tighten or replace
F. No low evaporator fan speed (HI
speed OK)
1. Failed switch 1. Replace
2. Failed resistor 2. Replace
3. Failed relay 3. Replace
G. Compressor/Condenser will not
operate
1. C/B failed or OFF 1. Turn ON or replace
2. Relay(s) failed 2. Replace
3. Pressure switch failed 3. Replace
4. Power contactor failed 4. Replace
5. Low ambient temperature 5. Normal
6. Low refrigerant charge 6. Re- charge system
7. Motor temperature SW failed 7. Replace switch
H. No evaporator module air flow 1. C/B OFF 1. Turn ON
2. C/B failed 2. Replace
3. Mode SW failed 3. Replace
4. Fan speed SW failed 4. Replace
5. Seized motor(s) 5. Replace
6. Blower wheel failed 6. Replace
7. Blocked air outlet duct 7. Remove debris
8. Blocked air inlet duct 8. Remove debris
9. Aircraft power not ON 9. Turn ON
10. Motor temperature SW failed 10. Turn ON
I. Evaporator module coil freezing 1. No air flow 1. Turn fan ON
2. Expansion valve failed or clogged 2. Remove debris or replace
3. Expansion valve setting low 3. Reset to 26- 30 PSIG suction
press.
21-57-00