11
8700-0006-000 (Rev. 12) 08/2020
5/Troubleshooting
SYMPTOM
POSSIBLE CAUSES
POSSIBLE SOLUTION
Erratic gauge movement
resulting from regulator
adjustment
Damaged Diaphragm inside regulator
module
Replace Diaphragm [30] or regulator module
assembly [12]
Damaged/Missing O-ring, Quad-ring on
regulator module
Replace O-ring [35] and/or Quad-ring [36]
Gauge assembly is damaged
Replace gauge assembly [6]
Knob stuck in full OFF
or full ON position
Excessive force applied
Rotate the knob [2] to free the Regulator
Module Assembly [12]
Suction level can
be adjusted without
pushing the knob in
Damaged drive gear
Replace drive gear [5]
Damaged actuator
Replace actuator occlude-to-set [6]
Damaged Knob
Replace knob [2]
Gauge won’t zero
Damaged gauge assembly
Replace gauge assembly [6]
Whistling/buzzing noise
from the unit
Need to apply grease on stem on regulator
module
Apply grease on stem [31]
Gauge responds slowly
to changes in suction/
failed bleed down test
Blocked bleed hole orifice
Clean bleed hole orifice [32]
Damaged gauge assembly
Replace gauge assembly [6]
Damaged/Clogged Supply side or Patient
side fittings
Replace fittings if damaged/clogged
Retighten/Torque if found loose
Vacuum relief valve
activates below
specified range
{PED and NEO ONLY}
Damaged regulator case
Replace regulator case [3]
Damaged diaphragm
Replace diaphragm [30]
Damaged/loose set screw
Replace/Adjust set screw 8700-0007-400.
Damaged vacuum relief assembly
Replace vacuum relief assembly
6700-0045-700.
Vacuum relief valve
does not activate at
specified range
{PED and NEO ONLY}
Damaged vacuum relief assembly
Replace vacuum relief assembly and follow
Section 6.3 suction level limit setting.
