Maytag Amana PMH Series Service And Troubleshooting page 12

VOLTAGE REQUIREMENTS
OPERATING VOLTAGES
Use a voltmeter, check the voltage at the outlet.
The reading must be within the minimums and maximums
shown below for the operating voltage.
Operating Voltages
Unit Voltage
Rating Minimum Voltage
115
230/208
265
• LCDI or AFCI Power Cords - Underwrites Laboratories
and the National Electric Code (NEC) now require power
cords that sense current leakage and can open the electri-
cal circuit to the unit on units rated at 250 volts or less. In
the event that unit does not operate, check the reset button
located on or near the head of the power cord as part of
the normal troubleshooting procedure.
LCDI Power Cord
Important Note
Cord connection to a wall socket is not permitted for 265-
volt units. All 265-volt units must be hard wired using the
hard wire kit or make use of the plug-in receptacle in the
standard subbase.
Sequence of Operation
Cooling mode
To set the unit for the cooling mode, press the COOL
button on the touch pad, then press the + Plus or – Minus
button to set the desired temperature and press the fan
speed button to select LOW, HIGH or Auto. If you select
Auto the fan speed will automatically switch between LOW
and HIGH based on the temperature of the room and the
set point. If temperature is more than 5 degrees higher than
the set point the fan will come on in HIGH and then switch
to LOW when the room temperature is within 5 degrees of
the set point.
Once you have selected COOL, the desired temperature
and the FAN selection, the fan will come on first and then
the compressor will come on approximately 2 seconds
later. When the room temperature has reached the de-
sired set point the compressor will shut off and the fan will
Voltage Utilization Range
Maximum Voltage
104 127
197 253
238 292
continue to run for approximately 30 seconds and then will
shut off.
Heating Mode
If the model is a PTC** the unit is an electric heat only unit
which means the fan and electric heating element will be
the only things that will operate in the heating mode.
To set the unit for heat mode press the HEAT button on the
touch pad and then press the + Plus or -Minus buttons to
set the desired temperature, and press the fan speed but-
ton to select LOW, HIGH or Auto. If you select Auto the fan
speed will automatically switch between LOW and HIGH
based on the temperature of the room and the set point.
If temperature is more than 5 degrees higher than the set
point the fan will come on in HIGH and then switch to LOW
when the room temperature is within 5 degrees of the set
point.
Once you have selected the HEAT, the desired temperature
and the FAN selection, the fan and the electric heat strip
will come on. When the room temperature has reached the
desired set point the electric heat strip will shut off and the
fan will continue to run for approximately 30 seconds and
then shut off.
Heat Mode
If the model is a PTH** the unit is a heat pump and will
operate in electric heat or reverse cycle heat pump mode.
To set the unit for heat mode press the HEAT button on the
touch pad and then press the + Plus or -Minus buttons to
set the desired temperature, and press the fan speed but-
ton to select LOW, HIGH or Auto. If you select Auto the fan
speed will automatically switch between LOW and HIGH
based on the temperature of the room and the set point.
If temperature is more than 5 degrees higher than the set
point the fan will come on in HIGH and then switch to LOW
when the room temperature is within 5 degrees of the set
point.
Once you have selected the HEAT, the desired temperature
and the FAN selection, the temperature of the room, the
outdoor ambient temperature and the desired set point will
determine if the unit will come on in electric heat or heat
pump and bring on the compressor. The room temperature
will need to be within 4 degrees of the unit's set point for
the compressor
to come on in the heat pump mode. If the room tempera-
ture is more than 4 degrees higher than the set point the
unit will come on in electric heat only. If the electric heat
comes on the unit will remain in electric heat for the com-
plete cycle. When the desired room temperature is reached
the unit will cycle of the heat strip and the fan. When the
unit cycles back on the unit will bring on the compressor
in the heat pump mode and operate with the heat pump.
The heat pump will continue to operate until the outdoor
coil reaches approximately 27 degrees at which time the
outdoor coil thermistor will shut off the compressor and
bring the unit back into the electric heat only operation. The
outdoor coil thermistor will keep the heat pump locked out
until the thermistor is seeing an outdoor coil temperature
12