fig. 2-3. sheet 11. fig. 2-3 sheet 11 fig. 2-3 sheet 11. fig. 2-51 fig. 2-51 3-101 2-3 sheet 11. para 3-121 fig 2-3 sheet 21. fig. 2-3 sheet 11 para 3-101 fig 2-3 sheet 21 Section   IV. TROUBLESHOOTING 3 - 7 .    G e n e r al listed  in   table   3-2.   The   first   column   shows   the This   section   contains   information   that   is   useful   in apparent   trouble   or   symptom,   the   second   column diagnosing   and   correcting   troubles   which   cause contains   the   probable   cause,   and   the   corrective unsatisfactory   operation   of   failure   of   the   air   con- action   is   listed   in   the   third ditioner. are   beyond   the   scope   of 3-8.    Operator’s    Troubleshooting    Chart reported   to   organizational Troubleshooting   procedures   for   operator   /   crew   are column.   Remedies   that the   operator   must   be maintenance. Table  3--2.  Troubleshooting Malfunction a. b. c. a. b. c. d. e. f. g’. a. b. c. Main  power  cable  disconnected. Control   or   compressor   circuit breaker  in "OFF”   position. Mode  selector  switch  in  “OFF” posit ion. Mode   selector   switch   i m - properly   positioned. Temperature   selector   switch   set incorrectly. Insufficient air passing over evaporator   coil. Too   much   outside   air   entering unit. Insufficient   refrigerant   in   system. Evaporator    fan at  low  speed. Insufficient   air condenser  coil. speed   switch   set passing   through Mode   selector   switch   improperly set. Temperature   selector   switch   set incorrectly. Insufficient    air    movement    over heaters. Section   V.   OPERATOR’S   MAINTENANCE   OF   AIR   CONDITIONER 3-9.  G e n e r al 3-12.    Liquid    Sight    Indicator This   section   contains   maintenance   procedures   for Wipe   refrigerant   liquid   sight   indicator   glass   with   a the   operator   of   the   air   conditioner. soft   clean   cloth.   Set   controls   at   cool-cooler   and 3-10.   Louvers,   Condenser   Guard   and   Fresh   Air operate   unit   for   15   minutes   before   observation. S c r e en Remove  any  obstructions.  Brush wipe   clean. 3 - 1 1 .    D r a i ns Clean   out   drain   openings   and structions. Yellow   appearance   indicates   moisture   in   system off   loose   dirt   and and   bubbles   or   milky   flow   indicate   low   refrigerant charge.   Report   presence   of   these   conditions   to direct   support   maintenance. remove   any   ob- 3-3