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Figure 3-25. Air conditioner refrigerant system
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TM-5-4120-339-14 Air Conditioner Vertical Compact 9 000 BTU/HR 208 Volts 3-Phase 50/60 HZ Tierany Model TM9KV-208-3-60 Manual
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Sight Glass - TM-5-4120-339-140073
TM 5-4120-339-14
(a) Turn the selector switch to the "OFF" position and disconnect the air conditioner from the electrical
power supply.
(b) Refer to figure 3-3 and remove the air conditioner cover and the top panel.
(c) Refer to figure 3-25 and inspect the pressure equalizer solenoid valve for damage which would impair
serviceability.
(d) If such damage is found, notify Direct Support Maintenance.
(e) If no such damage is found, proceed to step (2).
(2) Test.
(a) Refer to figure 3-13 and disconnect plug P10 from receptacle J10 on junction box.
(b) Connect a source of dc voltage (set at zero output) across pins "c" and "f" of plug P10.
(c) While listening for a click from the solenoid, slowly increase the output of the dc voltage source. The
click should occur at or shortly before the time the voltage has been increased to 20.4 volts.  If the test result is
satisfactory, proceed to step (d). If the test result is not satisfactory, proceed to step (e).
(d) While listening for a click from the solenoid, slowly decrease the voltage. The click should occur at or
shortly before the time the voltage has been decreased to 18 volts. If the test result is satisfactory, proceed to step (f). If
the test result is not satisfactory, proceed to step (e).
(e) If pressure equalizer solenoid valve fails to respond properly during testing, notify Direct Support
Maintenance.
(f) If pressure equalizer solenoid valve responds properly during testing, refer to figure 3-13 and
reconnect plug P10 to receptacle J10 on the junction box.
(g) Refer to figure 3-3 and install the top panel and the air conditioner cover.
d. Liquid Line Solenoid Valve L1.
(1) Inspection.
(a) Turn the selector switch to the "OFF" position and disconnect the air conditioner from the electrical
power supply.
(b) Refer to figure 3-3 and remove the front access panel.
(c) Refer to figure 3-25 and inspect the liquid line solenoid valve for damage which would impair
serviceability.
(d) If such damage is found, notify Direct Support Maintenance.
(e) If no such damage is found, proceed to step (2).
(2) Test.
(a) Refer to figure 3-13 and disconnect plug P10 from receptacle J10 on junction box.
(b) Connect a source of dc voltage (set at zero output) across pins "m" and "n" of plug P10.
(c) While listening for a click from the solenoid, slowly increase the output of the dc voltage source. The
click should occur shortly before the time the voltage has been increased to 20.4 volts. If the test result is satisfactory,
3-48

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