Figure 117. Precision suction restrictor
VFD Programming Parameters (Supply/
Relief)
W W A A R R N N I I N N G G
H H a a z z a a r r d d o o u u s s V V o o l l t t a a g g e e w w / / C C a a p p a a c c i i t t o o r r s s ! !
F F a a i i l l u u r r e e t t o o d d i i s s c c o o n n n n e e c c t t p p o o w w e e r r a a n n d d d d i i s s c c h h a a r r g g e e
c c a a p p a a c c i i t t o o r r s s b b e e f f o o r r e e s s e e r r v v i i c c i i n n g g c c o o u u l l d d r r e e s s u u l l t t i i n n d d e e a a t t h h o o r r
s s e e r r i i o o u u s s i i n n j j u u r r y y . .
D D i i s s c c o o n n n n e e c c t t a a l l l l e e l l e e c c t t r r i i c c p p o o w w e e r r , , i i n n c c l l u u d d i i n n g g r r e e m m o o t t e e
d d i i s s c c o o n n n n e e c c t t s s a a n n d d d d i i s s c c h h a a r r g g e e a a l l l l m m o o t t o o r r s s t t a a r r t t / / r r u u n n
c c a a p p a a c c i i t t o o r r s s b b e e f f o o r r e e s s e e r r v v i i c c i i n n g g . . F F o o l l l l o o w w p p r r o o p p e e r r
l l o o c c k k o o u u t t / / t t a a g g o o u u t t p p r r o o c c e e d d u u r r e e s s t t o o e e n n s s u u r r e e t t h h e e p p o o w w e e r r
c c a a n n n n o o t t b b e e i i n n a a d d v v e e r r t t e e n n t t l l y y e e n n e e r r g g i i z z e e d d . . F F o o r r v v a a r r i i a a b b l l e e
f f r r e e q q u u e e n n c c y y d d r r i i v v e e s s o o r r o o t t h h e e r r e e n n e e r r g g y y s s t t o o r r i i n n g g
c c o o m m p p o o n n e e n n t t s s p p r r o o v v i i d d e e d d b b y y T T r r a a n n e e o o r r o o t t h h e e r r s s , , r r e e f f e e r r t t o o
t t h h e e a a p p p p r r o o p p r r i i a a t t e e m m a a n n u u f f a a c c t t u u r r e e r r ' ' s s l l i i t t e e r r a a t t u u r r e e f f o o r r
a a l l l l o o w w a a b b l l e e w w a a i i t t i i n n g g p p e e r r i i o o d d s s f f o o r r d d i i s s c c h h a a r r g g e e o o f f
c c a a p p a a c c i i t t o o r r s s . . V V e e r r i i f f y y w w i i t t h h a a C C A A T T I I I I I I o o r r I I V V v v o o l l t t m m e e t t e e r r
r r a a t t e e d d p p e e r r N N F F P P A A 7 7 0 0 E E t t h h a a t t a a l l l l c c a a p p a a c c i i t t o o r r s s h h a a v v e e
d d i i s s c c h h a a r r g g e e d d . .
Units shipped with an optional variable frequency drive
(VFD) are preset and run tested at the factory. If a
problem with a VFD occurs, ensure that the
programmed parameters listed in have been set before
replacing the drive.
V V e e r r i i f f y y P P a a r r a a m m e e t t e e r r s s
Verify parameter 1-23 is set to 60 Hz (or 50 Hz where
applicable) and that parameter 0-06 is set to the correct
supply voltage/frequency range.
1. To check parameter 1-23 press the Main Menu
button twice (if TR150 drive) (press the Back button
if the main menu does not display)
2. Scroll down to Load & Motor, press OK
3. Select 1-2, press OK
4. Press down until parameter 1-23 is displayed.
Parameter 1-23 can then be modified by pressing
OK and pressing the Up and Down buttons.
5. When the desired selection has been made, press
OK .
RT-SVX072A-EN
S S e e r r v v i i c c e e a a n n d d M M a a i i n n t t e e n n a a n n c c e e
Should replacing the VFD become necessary, the
replacement is not configured with all of Trane's
operating parameters. The VFD must be programmed
before attempting to operate the unit.
To verify and/or program a VFD, use the following
steps:
1. At the unit, turn the 115 volt control circuit switch
1S70 to the Off position.
2. Turn the 24 volt control circuit switch to the Off
position.
W W A A R R N N I I N N G G
H H a a z z a a r r d d o o u u s s V V o o l l t t a a g g e e w w / / C C a a p p a a c c i i t t o o r r s s ! !
F F a a i i l l u u r r e e t t o o d d i i s s c c o o n n n n e e c c t t p p o o w w e e r r a a n n d d d d i i s s c c h h a a r r g g e e
c c a a p p a a c c i i t t o o r r s s b b e e f f o o r r e e s s e e r r v v i i c c i i n n g g c c o o u u l l d d r r e e s s u u l l t t i i n n d d e e a a t t h h o o r r
s s e e r r i i o o u u s s i i n n j j u u r r y y . .
D D i i s s c c o o n n n n e e c c t t a a l l l l e e l l e e c c t t r r i i c c p p o o w w e e r r , , i i n n c c l l u u d d i i n n g g r r e e m m o o t t e e
d d i i s s c c o o n n n n e e c c t t s s a a n n d d d d i i s s c c h h a a r r g g e e a a l l l l m m o o t t o o r r s s t t a a r r t t / / r r u u n n
c c a a p p a a c c i i t t o o r r s s b b e e f f o o r r e e s s e e r r v v i i c c i i n n g g . . F F o o l l l l o o w w p p r r o o p p e e r r
l l o o c c k k o o u u t t / / t t a a g g o o u u t t p p r r o o c c e e d d u u r r e e s s t t o o e e n n s s u u r r e e t t h h e e p p o o w w e e r r
c c a a n n n n o o t t b b e e i i n n a a d d v v e e r r t t e e n n t t l l y y e e n n e e r r g g i i z z e e d d . . F F o o r r v v a a r r i i a a b b l l e e
f f r r e e q q u u e e n n c c y y d d r r i i v v e e s s o o r r o o t t h h e e r r e e n n e e r r g g y y s s t t o o r r i i n n g g
c c o o m m p p o o n n e e n n t t s s p p r r o o v v i i d d e e d d b b y y T T r r a a n n e e o o r r o o t t h h e e r r s s , , r r e e f f e e r r t t o o
t t h h e e a a p p p p r r o o p p r r i i a a t t e e m m a a n n u u f f a a c c t t u u r r e e r r ' ' s s l l i i t t e e r r a a t t u u r r e e f f o o r r
a a l l l l o o w w a a b b l l e e w w a a i i t t i i n n g g p p e e r r i i o o d d s s f f o o r r d d i i s s c c h h a a r r g g e e o o f f
c c a a p p a a c c i i t t o o r r s s . . V V e e r r i i f f y y w w i i t t h h a a C C A A T T I I I I I I o o r r I I V V v v o o l l t t m m e e t t e e r r
r r a a t t e e d d p p e e r r N N F F P P A A 7 7 0 0 E E t t h h a a t t a a l l l l c c a a p p a a c c i i t t o o r r s s h h a a v v e e
d d i i s s c c h h a a r r g g e e d d . .
I I m m p p o o r r t t a a n n t t : : HIGH VOLTAGE IS PRESENT AT TERMINAL
BLOCK 1TB1 OR UNIT DISCONNECT
SWITCH 1S14.
3. To modify parameters:
a. Press Main Menu twice (if TR150 drive) (press
Back if the main menu does not display)
b. Use the Up and Down buttons to find the
parameter menu group (first part of parameter
number)
c. Press OK
d. Use the Up and Down buttons to select the
correct parameter sub-group (first digit of
second part of parameter number)
e. Press OK
f.
Use the Up and Down buttons to select the
specific parameter
g. Press OK
h. To move to a different digit within a parameter
setting, use the Left and Right buttons
(Highlighted area indicates digit selected for
change)
i.
Use the Up and Down buttons to adjust the digit
j.
Press Cancel to disregard change, or press OK
to accept change and enter the new setting
4. Repeat
Step 3
for each menu selection setting in .
143
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