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TABLE
6-1
STARTUP
INDICATION
MOtor fails to rotate
but hums or rotates at
very slow speed (less
than full 2/3 speed)
In "AUTO" mode motor
fails to run
Pressure not stable
under steady demand
CHECK!ADJUST/REPhACE
2.
Adjust "Current Limit" in steps of 1/8 of a
turn CW until motor reaches top speed or
adjustment reaches limit.
3.
Go to Regulator Troubleshooting Table 6-2.
1.
Using a VOM, verify that a 3 to 5 VDC reading
is measured with the common probe on 1TB-R1
and the plus
(+)
probe on lTB-R3.
(If
18 to 20 volts is measured, the sensor
should be replaced).
2.
Using a VOM, verify that the voltage read1ng
is 3 to 5 VDC measured'with the common
probe on lTB-Rl and "plus
(+)
probe on
ITB-R2.
3.
Go to RegulatoI"Troubleshooting Table 6-2.
1.
a.
Adjust the "Response" control ,in ,such a
direction as to minimize the insta-
bility.
b.
Adjust the "'stabilitytl control to
further improve sYl\!tem performance',
2.
Adjust the "Throttling Range" sensor screw
in such a direction to improve system
staqility.
NOTE
STEP 2 ABOVE WILL AFFE£T STEP lea) AND
(b) AND THESE WILL,HAVE TO BE REPEATED.
3.
Bleed sensor fitting of trapped air.
6-S
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