MicroLinks Tech H-CAM Instrukcje Operacyjne Pobierz pdf (Strona 156)

TM 11574A-OI

3-62

Step Probable Cause Remedy

5 No evaporator air flow or restricted air flow. Refer to section 3-10b(11).

If fault is not corrected proceed to step 6.

6 Excessive frost on evaporator coil. Refer to section 3-11d.

If fault is not corrected proceed to step 7.

7 Evaporator fan(s) rotating backwards. Refer to section 3-10b(11) and 3-10b(12).

If fault is not corrected proceed to step 8.

8 Discharge pressure regulator valve defective. Inspect discharge pressure regulator valve

IAW 3-10b(16)(a).

Replace discharge pressure regulator valve

IAW 3-10b(16)(b).

If fault is not corrected proceed to step 9.

9 Suction modulation valve malfunction. Refer to section 3-10b(14).

If fault is not corrected proceed to step g (3).

(3) Suction and discharge pressures tend to equalize when unit is operating.

Step Probable Cause Remedy

1 Heat exchanger defective. Inspect heat exchanger IAW 3-10b(11)(e).

Replace heat exchanger IAW 3-10b(11)(e)1.

If fault is not corrected proceed to step 2.

2 Compressor valves defective. Refer to section 3-10b(5).

If fault is not corrected proceed to step 3.

3 Compressor cycling/stopped. Check IAW 3-10b(5).

s. Abnormal noise or vibrations.

(1) Compressor.

Step Probable Cause Remedy

1 Loose mounting bolts. Check for loose mounting bolts. Tighten

mounting bolts as necessary.

If fault is not corrected proceed to step 2.

2 Worn bearings. Refer to section 3-10b(5).

If fault is not corrected proceed to step 3.

3 Worn or broken valves. Refer to section 3-10b(5).

If fault is not corrected proceed to step 4.

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MicroLinks Tech H-CAM Instrukcje Operacyjne Strona 156