Table 4-2. UNIT TROUBLESHOOTING - continued
TEST OR INSPECTION
C O R R E C T I V E ACTION
Step 1. Check to see if HIGH PRESSURE CUTOUT switch has tripped.
PUSH and release TO RESET.
Step 2. Check operation of MODE selector rotary switch.
Turn switch to OFF/RESET, then turn to COOL.
Disconnect input power before performing internal electrical troubleshooting.
Voltages used can be lethal.
Use disconnect switch (NOT POWER CABLE) to disconnect power to unit.
Damage to cable connector pins will result if cable is used.
Step 3. Check for loose or damaged electrical connectors, or damaged wires in wiring harnesses. (See
Tighten or replace connectors, or repair or replace damaged wires.
Step 5. Check operation of coil frost switch.
Step 6. Check operation of compressor.
If not operating, notify supervisor.
COMPRESSOR STARTS NORMALLY, BUT SOON STOPS.
Step 1. Check to be sure fabric cover is rolled up.
Roll up and secure fabric cover.