System Troubleshooting - Turbo Air ADR042 Installation & Operation Manual

System troubleshooting.

symptoms
Main switch open
Blown fuse
Loose wiring
Compressor
not running
System cable shut down
Thermal overload tripped
Defective contactor or contactor coil
System shut down by safety devices.
Liquid line solenoid not open
Flooding
crankcase
Noisy
Improper piping support on suction or
Compressor
liquid line.
Worn compressor.
Non-condensable in system.
Too much refrigerant
High
Discharge
discharge
closed
pressure.
Fan not running
Dirty condenser coil
Faulty condenser temperature controls Check head pressure control
Suction shut off valve partially closed Open valve
Low discharge
Insufficient refrigerant
pressure.
Low suction pressure
Possible causes
of liquid refrigerant
shut off valve
20
Close switch
Check electrical
motor winding
grounds.
Replace fuse
corrected.
Check all wire junctions. Tighten
all terminal screws.
Replace shutdown cable.
Overloads
reset. Check unit when unit come
back on line.
Replace or repair
Check cause of shut down
Repair or replace coil
into
Check expansion valve setting
Relocate add hangers.
Replace compressor
Remove non-condensable.
Remove excess refrigerant
partially
Open valve
Check electrical circuit and fuse.
Clean condenser coil
Check leaks. Add charge.
See corrective steps for low
suction pressure.
Solution
circuits and
for shorts or
after fault is
are automatically