TM
9-4120-401-14
Table 4-2. UNIT TROUBLESHOOTING - continued
MALFUNCTION
TEST OR INSPECTION
C O R R E C T I V E ACTION
3.
COMPRESSOR STARTS NORMALLY, BUT SOON STOPS. - continued
Step 2. Check to be sure there is no restriction to air flow through condenser section.
Clean all obstructions from condenser inlet, outlet, and condenser coil.
Step 3. Check to be sure condenser fan is operating (air being discharged from condenser air outlet).
Step 4. Check for loose or damaged electrical connectors or damaged wires in wiring harnesses. (See
Tighten or replace connectors, or repair damaged wires.
Step 5. If compressor stops again soon after restart in COOL mode, do not attempt another restart.
Notify supervisor.
4. COMPRESSOR STARTS NORMALLY, BUT HIGH PRESSURE CUTOUT
SWITCH TRIPS.
Step 1. Check to be sure fabric cover is rolled up.
Roll up and secure fabric cover.
Step 2. Check to be sure there is no restriction to air flow through condenser section.
Clean all obstructions from condenser inlet, outlet, and condenser coil.
Step 3. Check to be sure condenser fan is operating (air being discharged from condenser air outlet).
Step 4. With unit operating in COOL mode, check condition of refrigerant in sight glass.
If indicator color is in the yellow zone or numerous bubbles appear in the window, turn
selector rotary switch to OFF/RESET and notify supervisor.
Step 5. Reset (PUSH) HIGH PRESSURE CUTOUT switch and restart unit.
If unit does not start, notify supervisor.
Step 6. Check that condenser air outlet louvers are not stuck or jammed in closed position.
Free louvers if possible and notify supervisor if actuating cylinder is not working properly.
4-27