Maytag Amana PMH Series Service And Troubleshooting page 28

Package terminal air conditioner/heatpump
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SCHEDULED MAINTENANCE
rechecked. Proper leveling for most installations are a ¼
bubble tilt to the outside and level from right to left. Con-
tact your sales person for detailed maintenance or cleaning
instructions.
Basepan and Condenser Coil
Before cleaning the basepan and condenser coil, turn OFF
unit mode switch and disconnect power to the unit. To
disconnect power, either unplug the power cord at the wall
outlet or subbase, or disconnect power at the fuse box or
circuit breaker.
1. Create a water-tight seal by tightly covering the entire
control panel area and fan motor with plastic. Creating
this seal prevents water from entering the control area
or the fan motor and damaging the unit.
2. Spray condenser coil and basepan down with water.
Next spray a mild biodegradable detergent such as Sim-
ple Green™ onto the condenser coil and basepan. Let
set for five (5) minutes.
3. Rinse condenser coil and basepan with water again.
NOTE: Ensure water pressure is no higher than that of
an ordinary garden hose and the water temperature no
higher than 120°F.
4. Tilt the non-compressor side of the unit up no higher
than 45 degrees and allow water to drain out the other
side of the unit.
5. Remove excess water left in the basepan by wiping the
basepan with a dry cloth.
6. Remove the water-tight seal from the motor and control
panel area.
7. Reinstall unit back into wall sleeve.
8. Allow unit to dry for 24 hours before reapplying power.
When power is reapplied test unit for proper operation.
9. Place a non-acidic algaecide in the basepan to inhibit
bacteria growth. Ensure the algaecide is compatible
with wet coil operation and is not corrosive to the coil.
Clearance Check
Clearances around the unit should also be checked to
make sure that the intake air and discharge air paths have
not become blocked or restricted. A minimum of eight inch-
es clearance is needed from unit to furniture, beds, or other
objects for proper operation. Restricted discharge or intake
air will reduce the units operational performance. In severe
airflow restrictions damage can occur to unit components
such as the compressor, electric heater or fan motor.
Normal Operating Sounds and Conditions
Water Trickling Sounds
Water is picked up and distributed over the coil. This im-
proves the efficiency and helps with water removal.
Water Dripping
Water will collect in the base pan during high humidity
days. This can cause overflow and drip from the outside of
the unit.
Air Sounds
The fan cycle switch sets the operational mode of the fan
in the on position. When the unit is in conditioning mode for
example high or low heat or cool, the fan will run contin-
uously. In the AUTO position, the fan will cycle on and off
with the compressor or electric heater.
Starting Delay
You may notice a few minutes delay in the starting if you
try to start the unit too soon after turning the unit off. This is
due to a built in delay to protect the compressor.
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