12
Unitary Products Group
035-19400-000-A-0403
TROUBLESHOOTING
WARNING: Troubleshooting of components necessarily re-
quires opening the electrical control box with the
power connected to the unit. Use extreme care
when working with live circuit!
Check the unit
nameplate for the correct range before making any
connections with line terminals.
CAUTION: The wire number or color and terminal designa-
tions referred to may vary. Check the wiring label
inside the control box access panel for the correct
wiring.
CAUTION: If the variable speed motor found in the BAU mod-
els operates erratically, check the fan control board
for the presence of a break-off tab. Remove tab if
present.
OUTDOOR COIL - Dirt should not be allowed to accumulate on
the outdoor coil surface or other parts in the air circuit. Cleaning
should be as often as necessary to keep the coil clean. Use a
brush, vacuum cleaner attachment, or other suitable means. If
water is used to clean the coil, be sure that the power to the unit
is shut off prior to cleaning.
CAUTION: Exercise care when cleaning the coil so that the
coil fins are not damaged.
Do not permit the hot condenser air discharge to be
obstructed by overhanging structures or shrubs.
NORMAL MAINTENANCE
WARNING: Prior to any of the following maintenance proce-
dures, shut off all power to the unit, to avoid per-
sonal injury.
Periodic maintenance consists of changing or cleaning filters
and general cleaning of the outdoor coil.
FILTERS - Inspect once a month. Replace Disposable or clean
Permanent Type as necessary. DO NOT replace Permanent
Type with Disposable.
MOTORS - Indoor and outdoor fan motors are permanently lu-
bricated and require no maintenance.
MAINTENANCE
