TM 9-4120-395-14&P
5-2. TROUBLESHOOTING - Continued.
Table 5-1. Direct Support Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2.
INDOOR FAN STARTS IN COOL MODE, BUT OUTDOOR FAN DOES NOT START AND COMPRESSOR DOES
NOT START.
Disconnect input power before performing internal electrical troubleshooting.
Voltages used can be deadly.
NOTE
If power has been connected to unit, a short (30 minute maximum during very cold
weather) warm up period is required. When compressor reaches a safe operating
temperature, it will come on automatically if the thermostat is set for cooling and
the thermostat lever is set to about 10 degrees F (5.6 degrees C) below the ambient
indoor temperature.
Step 1. Check for loose or damaged electrical connectors and wires. See para 4-23.
Tighten or replace connectors or repair damaged wires.
Replace compressor.
3.
AIR CONDITIONER STOPS COMPLETELY DURI NG OPERATION.
HIGH VOLTAGE is used in' the operation of this equipment. DEATH ON
CONTACT or severe injury may result if personnel fail to observe safety
precautions.
Step 1.
Check that indoor fans (15, Figure 1-2) and outdoor fan (i2) start immediately when a restart in COOL
mode is made. If fans do not start, test as follows:
Disconnect input power before performing internal electrical troubleshooting.
Voltages used can be deadly.
a.
Replace If defective.
b.
Replace if defective.
Step 2.
Perform a refrigerant pressure check. See para 5-i i,
Replace defective components.
Step 3.
Replace if defective.
5-2