Sight Glass Liquid Indicator.

TM 5-4120-356-14

(h) If liquid line solenoid valve fails repeat test, notify Direct

Support Maintenance.

(7) In case of test failure of solenoid valve L2, proceed as follows:

( a ) Refer to figure 3-25 and remove four screws from the pressure

cut-out switch enclosure and pull enclosure and pressure switches aside sufficiently

to provide access to solenoid valve L2.

( b ) Refer to figure 3-25 and disconnect plug P6 from pressure

e q u a l i z e r valve L2 and plug P3 from junction box.

solenoid valve L2.

(d) If an open circuit is found, refer to figure 3-26 and replace

solenoid valve coil.

(e) If no open circuit is found, check for continuity between pin

A of plug P6 and pin E of plug P3 and between pin B of plug P6 and pin F of plug P3.

(f) Replace electrical wiring if any open circuit is found.

(g) After replacement of solenoid valve coil or electrical wiring,

refer to figure 3-25 and connect plug P6 to receptacle J6 on solenoid valve L2, then

repeat test procedure given in figure 3-25 for pressure equalizer solenoid valve L2.

(h) If repeat test of solenoid valve L2 is satisfactory, secure

p r e s s u r e c u t - o u t s w i t c h enclosure to panel with four attaching screws, then proceed

to step (8).

(i) If solenoid valve L2 fails repeat test, notify Direct support

Maintenance.

( 8 ) If operation of both solenoid valves is now satisfactory, refer to

figure 3-12 and install the junction box and control box, then refer to paragraph

3-9 and install the lower access panel, top panel and fabric cover.

b . S i g h t Glass Liquid Indicator. M a i n t e n a n c e of the sight glass at the

o r g a n i z a t i o n a l level is limited to inspecting the sight glass for external damage

w h i c h would impair serviceability. I f s u c h d a m a g e i s f o u n d , r e p o r t t h e c o n d i t i o n

t o Direct Support Maintenance.

c . C o n d e n s e r Coil. M a i n t e n a n c e o f t h e c o n d e n s e r c o i l a t t h e o r g a n i z a t i o n a l

maintenance l e v e l i s l i m i t e d t o c l e a n i n g . C l e a n c o i l a s f o l l o w s :

( 1 ) R.emove the condenser coil guard in accordance with paragraph 3-9.

(2) Clean the condenser coil by brushing with a fiber bristle brush.

(3) After cleaning, reinstall the condenser coil guard.

d . Evaporator Coil. Maintenance of the evaporator coil at the organizational

maintenance l e v e l i s l i m i t e d t o c l e a n i n g . C l e a n c o i l a s f o l l o w s :