TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 Change 1 2-21 AIR-CONDITIONER 1. Insufficient cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22 2. Intermittent cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23 AIR-CONDITIONER COMPRESSOR 3. Insufficient cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24 4. Unusual noise with clutch engaged . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25 5. Unusual noise with clutch disengaged . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26 6. Incorrect oil level or leak . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26 AIR-CONDITIONING TROUBLESHOOTING SYMPTOM INDEX * Information not available TROUBLESHOOTING MALFUNCTION AIR-CONDITIONING PROCEDURE NO. MALFUNCTION PAGE Table 2-2. Normal Operating Temperatures and Pressures (R-12). Relative Surrounding Engine Desirable Center Low Side High Side Humidity Air Temperature Speed Outlet Discharge Pressure Pressure (percent) °F (°C) (rpm) Air Temperature psi (kPa) psi (kPa) °F (°C) ±5 psi (±34 kPa) ±25 psi (±172 kPa) 70 (21) 40 ( 4) 11 ( 76) 177 (1220) 20 80 (26) 1500 42 ( 6) 17 (117) 208 (1434) 90 (32) 44 ( 7) 22 (152) 226 (1558) 100 (37) 45 ( 7) 25 (172) 255 (1758) 70 (21) 42 ( 6) 13 ( 89) 181 (1247) 30 80 (26) 1500 43 ( 6) 18 (124) 208 (1544) 90 (32) 45 ( 7) 24 (165) 234 (1613) 100 (37) 46 ( 9) 28 (193) 267 (1840) 70 (21) 42 ( 6) 14 ( 96) 185 (1275) 40 80 (26) 1500 44 ( 7) 20 (138) 220 (1517) 90 (32) 46 ( 8) 26 (179) 243 (1675) 100 (37) 48 ( 9) 30 (207) 278 (1917) 70 (21) 44 ( 7) 14 ( 96) 189 (1303) 50 80 (26) 1500 46 ( 8) 22 (152) 226 (1558) 90 (32) 50 (10) 26 (179) 251 (1730) 100 (37) 52 (11) 30 (207) 289 (1992) 70 (21) 44 ( 7) 16 (110) 193 (1331) 60 80 (26) 1500 50 (10) 24 (165) 233 (1606) 90 (32) 52 (11) 28 (193) 259 (1786) 100 (37) 54 (12) 32 (221) 300 (2068) 70 (21) 46 ( 8) 18 (124) 198 (1365) 70 80 (26) 1500 50 (10) 24 (165) 238 (1641) 90 (32) 54 (12) 30 (207) 267 (1840) 100 (37) 58 (14) 32 (221) 312 (2151) 70 (21) 50 (10) 22 (152) 202 (1393) 80 80 (26) 1500 56 (13) 26 (179) 244 (1682) 90 (32) 60 (16) 32 (221) 277 (1910) 100 (37) * * * 70 (21) 60 (16) 24 (165) 206 (1420) 90 80 (26) 1500 64 (18) 34 (234) 250 (1724) 90 (32) 70 (21) 44 (303) 284 (1958) 100 (37) * * * NOTE Table 2-2 applies to air-conditioning systems serviced with R-12 refrigerant only.