Instruction Manual ND IM 3 JAN 2017
Instruction Manual
IM ND 3 JAN 2017
Page 19
9.3 Troubleshooting Chart
PROBLEM
TROUBLESHOOTING CODE
Power won’t come on (“POWER” light off on panel)
A, B, C
No or low inlet compressed air pressure
F, G, H, I
Inadequate or no process heat
D, E, F, G, H, I, M, S
Material not being dried properly
D, E, F, G, H, I, J, K, M, N, O, P, Q, R, S
High air dew point
F, G, H, I, J, L,N
I
Inlet compressed air LOWER pressure is
less than 85 psi, as read on the pressure
gauge supplied on the left side of the unit.
Low inlet compressed air LOWER pressure. Red
light “low compressed air pressure” may be on.
•
Air inlet valve fully open?
•
Check airline to NovaDrier for obstructions
or restrictions.
•
Is airline the correctly size per specification
sheet on p3?
•
Are there airline “quick connects” with
restrictive internals & check valve that is
reducing the air pressure?
•
Check plant air system.
J
Inlet compressed air LOWER temperature
is more than 100°F
High inlet compressed air LOWER temperature.
Check plant air system & correct so the inlet
temperature is below 100°F.
K
Relief valve (on top of hopper)
Clogged with material or dust.
Clean dust out. On the ½” & ¾” npt brass
valves on models
N-7, N-25 & N-50: unscrew valve body & clean
valve disk.
L
Dew Point Sensor (optional feature, if
supplied)
Not operating:
Hi or Erratic Dew Point:
•
Check cable & wiring for breaks or tightness.
•
Replace sensor- change yearly
•
Check for air leaks into sensor or in tubing to
sensor.
CODE
CHECK
CONDITIONS
SOLUTIONS
A
Power LOWER
No voltage or incorrect voltage
Check field installed disconnect or incoming
voltage.
B
Transformer (if supplied)
No voltage on primary:
No voltage on secondary:
•
See code “A”
•
Check fuse – if ok & power to primary,
replace transformer
C
Light bulb
Burnt out
Replace
D
Heater amperage
Voltage correct but amps incorrect (check both
heaters inside box)
Replace heater element as required
E
Re-circulation air filter (located at the top
of the box, unscrew the top wing nut to
replace)
Dirty filter restricting the re-circulation air flow
Replace filter element (
replace about very 6
month min, as required)
F
Two Compressed air inlet filters (on left
side of box & red in color).
One or both of the air pressure drop indicators on top
of the filters have changed from green to red,
indicating a clogged filter element.
Replace both filter elements – (
Both filters
must be replaced yearly to maintain
warranty!).
G
Two Compressed air inlet filters (on left
side of box & red in color).
Condensate from one or both filters not draining from
the automatic traps in the bottom of each filter. This
will cause a high dew point from the Dryer & a high
air pressure drop across the filters. Water shows in
the level gauge on the side of the filter(s).
•
Check air filter drain tubing (if installed) for
restrictions.
•
Make sure the filter is vertical.
•
Clean or replace the automatic drain, as
required.
H
Leaks in system
Air leaking out of system causing poor performance.
•
Check piping & gasket for leaks; repair or
replace as required.
•
Check clamp ring(s) & door clamps on
hopper to make sure they’re tight, gaskets
are okay & sealing properly.
•
Gate valve on material drain valve at the
bottom of hopper on the side is fully closed
& (2) setscrews are tight.
•
Check air tubing inside of control box to
make sure their connected properly. Check
all hoses to make sure hose clamps are tight
& hoses are not damaged.
•
Wing nut on top of round filter housing (F3)
on top of control box is tight.
