TTA-R407C-EN1113
24
Notes:
1. Perform each inspection once per month (during cooling season) while unit is operating.
Maintenance Log
1
Evaporator
Ambient Entering
air
Compressor
Superheat
Subcooling
Temp Dry Wet Suction Discharge Circuit
Circuit
Date
(F)
Bulb
Bulb
Pressure
pressure
No. 1 (1)
No. 1 (F)
Maintenance
Maintenance
Perform all of the indicated
maintenance procedures at the
intervals scheduled. This will prolong
the life of the unit and reduce the
possibility of costly equipment failure.
Monthly
Conduct the following maintenance
inspections once per month.
disconnect to prevent injury or death
from electrical shock or contact with
moving parts.
• Inspect air filters and clean if
necessary.
• Check unit wiring to ensure all
connections are tight and that the
wiring insulation is intact.
• Check drain pans and condensate
piping to insure they are free of
obstacles.
• Manually rotate the outdoor fan to
insure proper operation. Inspect
the fan mounting hardware for
tightness.
• Inspect the evaporator and
condenser coils for dirt and debris.
If the coils appear dirty, clean them.
• With the unit operating in the
cooling mode, check the suction
and discharge pressures and
compare them with the values
provided in “Pressure Curves”.
Record these readings on the
“Maintenance Log”.
• Observe indoor fan operation and
correct any unusual or excessive
vibration. Clean blower wheels as
needed.
Annually (Cooling Season)
The following maintenance procedures
must be performed at the beginning of
each cooling season to insure efficient
unit operation.
• Perform all of the monthly
maintenance inspections.
• With the unit operating, check unit
superheat and record the reading
in the “Maintenance Log”.
• Remove any accumulation of dust
and/or dirt from the unit casing.
• Remove any accumulation of dust
and/or dirt from the unit casing.
• Remove corrosion from any surface
and re-paint. Check the gasket
around the control panel door to
insure it fits correctly and is in good
condition to prevent water leakage.
• Remove corrosion from any surface
and re-paint. Check the gasket
around the control panel door to
insure it fits correctly and is in good
condition to prevent water leakage.
• Inspect the evaporator fan belt. If it
is worn or frayed, replace it.
• Inspect the control panel wiring to
insure that all connections are tight
and that the insulation is intact.
Lubricate the indoor fan motor
bearings with a non-detergent,
20-weight oil. (To insure good bearing
lubrication, condenser fan motor
bearings should be lubricated once
every six months).
Note: Some motors are permanently
lubricated.
• Check refrigerant piping and fittings
for leaks.
4
Warning:
Open and lock unit
TTA-R407C-EN1113.indd 24
TTA-R407C-EN1113.indd 24
12-Sep-16 13:28:23
12-Sep-16 13:28:23
