Troubleshooting Chart - NovaTec NovaDrier ND-7 Instruction Manual

9.3 Troubleshooting Chart

Power won't come on ("POWER" light off on panel)
No or low inlet compressed air pressure
Inadequate or no process heat
Material not being dried properly
High air dew point
CODE CHECK
A Power LOWER
B Transformer (if supplied)
C Light bulb
D Heater amperage
E Re-circulation air filter (located at the top
of the box, unscrew the top wing nut to
replace)
F Two Compressed air inlet filters (on left
side of box & red in color).
G Two Compressed air inlet filters (on left
side of box & red in color).
H Leaks in system
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.
J Inlet compressed air LOWER temperature
is more than 100°F
K Relief valve (on top of hopper)
L Dew Point Sensor (optional feature, if
supplied)
Instruction Manual IM ND 3 JAN 2017
PROBLEM
No voltage or incorrect voltage
No voltage on primary:
No voltage on secondary:
Burnt out
Voltage correct but amps incorrect (check both
heaters inside box)
Dirty filter restricting the re-circulation air flow
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.
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).
Air leaking out of system causing poor performance.
Low inlet compressed air LOWER pressure. Red
light "low compressed air pressure" may be on.
High inlet compressed air LOWER temperature.
Clogged with material or dust.
Not operating:
Hi or Erratic Dew Point:
Instruction Manual ND IM 3 JAN 2017
TROUBLESHOOTING CODE
A, B, C
F, G, H, I
D, E, F, G, H, I, M, S
D, E, F, G, H, I, J, K, M, N, O, P, Q, R, S
F, G, H, I, J, L,N
CONDITIONS SOLUTIONS
Check field installed disconnect or incoming
voltage.
• See code "A"
• Check fuse – if ok & power to primary,
replace transformer
Replace
Replace heater element as required
Replace filter element (replace about very 6
month min, as required)
Replace both filter elements – (Both filters
must be replaced yearly to maintain
warranty!).
• Check air filter drain tubing (if installed) for
restrictions.
• Make sure the filter is vertical.
• Clean or replace the automatic drain, as
required.
• 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.
• 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.
Check plant air system & correct so the inlet
temperature is below 100°F.
Clean dust out. On the ½" & ¾" npt brass
valves on models
N-7, N-25 & N-50: unscrew valve body & clean
valve disk.
• Check cable & wiring for breaks or tightness.
• Replace sensor- change yearly
• Check for air leaks into sensor or in tubing to
sensor.
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