©2001 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specifications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone (336) 629-4651
MNL-AST 7
®
AST
OBSERVATION
SOLUTION
Troubleshooting Guide
(1) Check C/B Fuse to ensure the power is on and the time control is
set correctly. The Big Dipper "on" time should be no less than 30
minutes per day. The timer should be set to come on during a period
of low or no drain water flow such as the hours when the facility is not
in use.
(2) Remove the lid and clean away any build-up that may be
present in the wiper blades, collection trough or outlet hose. Assure
that the wiper blade(s) are clipped properly in place on the skimmer
wheels. Replace wiper blades when worn.
(3) Set the time control to the " ON" position. While holding down the
safety switch, make sure that the skimmer wheel turns.
[CAUTION:
Keep your hands away from moving parts to avoid possible injury.
]
If
the skimmer motor does not come on, the motor assembly must be
replaced. If the motor and skimmer wheel operate, check to be sure the
safety switch is fully depressed when the lid is fastened on the unit.
(4) Check motor coupling to assure tightness
(5) If none of the above is a problem, then check the heater assembly.
If the side of the Big Dipper tank does not begin to feel warm within
15 minutes, the heater element is burned out and must be replaced.
No grease is collected in
the container
(1) Check the timer settings for excessive "on" time. The unit should
not run extensively after the grease and oils have been skimmed. Reset
as necessary, but not less than 30 minutes.
(2) Assure that the water flow to the unit does not exceed the rated flow
and that there are no drain line clogs downstream from the unit (See
plumbing installation section).
Excessive water is
observed in the grease
collection container
(1) Check the macerating pump for free operation by removing the
cover and inserting the jam wrench (provided) into its mating hole in
the top of the pump (See Page 8). This should turn freely. If it does not
turn, move the jam wrench back and forth until it frees the pump.
WARNING: BE SURE THAT POWER TO THE UNIT IS COM-
PLETELY DISCONNECTED BEFORE REMOVING THE PUMP
COVER.
Excessive solids are
observed in the solids
collection chamber