FOUND PRESSURE SWITCH TUBING CLOGGED CAUSING 6 FLASH FAULT CODE. CLEANED TUBING AND CYCLED IN HEAT WITH NO FURTHER CHALLENGES. STATED SYSTEM SEEMS TO HAVE LONG RUNTIMES IN COOLING. FOUND ALL (3) WINDINGS OF COMPRESSOR READING BAD. EVAPORATOR COILS RUSTED. HANDED OVER TO FIELD SUPERVISOR.