REDUCED HEATING CAPACITY. - TM-5-4120-393-140051

TM 5-4120-393-14

Table 3-1. Operator Troubleshooting

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 5. Check to be sure condenser air inlet and outlets are not obstructed.

Step 6. With unit operating in COOL mode, check condition of refrigerant in sight glass. Check after 15 minutes

of operation in full DECREASE and COOL mode.

If indicator color is in the yellow zone or numerous bubbles appear in the window, turn mode selector

switch to OFF and contact unit maintenance.

6. REDUCED HEATING CAPACITY.

Step 1. Check that all doors, windows, and other openings in the enclosure are tightly closed.

Tightly close all openings.

Step 2. Check operation of TEMPerature control thermostat.

Set mode selector switch to HI HEAT and TEMPerature control thermostat to fully INCREASE; then,

if condition improves, adjust properly to desired level. (See para 2-10 and 2-11.)

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