The Ductless Split System of Choice
Made in Rome, New York, USA
9
The control board can be accessed by removing the
return air grill and control box cover with a flat blade screw-
driver or a nutdriver.
NOTE:
The microprocessor will read the
dipswitch settings during power up. If the set-
tings need to be changed, disconnect the low
volt power to the evaporator for at least 1
minute. In some cases this also means switch-
ing the power to the condenser off. Reapply
power for settings to take effect.
TROUBLESHOOTING WSP/WHP & FSP/FHP
UNIT MOUNT INFRARED COMPATIBLE
CONTROL*
* When troubleshooting the WHP or FSP/FHP units, refer to the
wiring diagram on the back of the removeable return air grill. If
you are unable to locate this diagram, please call (315) 336-3716
and a copy can be faxed or mailed.
EMI
AmericaSeries
evaporators are designed to oper-
ate with EMI
AmericaSeries
condensers. Both the evapora-
tor (indoor unit) and condenser (outdoor unit) have a line
volt service connection and are intended to independently
connect to the electrical service panel (see the unit name
plate for the correct breaker type and size).
The indoor and outdoor units are also connected to
each other via 24v interconnect wiring. A transformer lo-
cated in the condensing unit provides the low volt power
source. The number of low volt conductors will be three to
five depending on heating options. Cooling only and cool-
ing with electric heat units have three (3) low volt wires
while heat pumps with electric heat have five.
C
OOLING
O
NLY
U
NITS
On cooling only units there are three low volt wires
on both the indoor and outdoor units. The yellow, red, and
brown wires of the air handler should be connected to the
corresponding yellow, red, and brown wires of the condenser.
A 24v transformer located in the condensing unit provides
low volt control power to both the air handler and condenser.
The 24v power supply can be measured across the red
(R) and brown (C) wires. The air handler will switch on and
off the condenser through the yellow (Y) wire. When the air
handler is calling for cooling, 24v can be measured between
terminals (wires) Y and C.
NOTE:
Most condenser manufacturers do not
supply low volt transformers with their
condensers. When connecting an EMI
evaporator to a non-EMI condenser, a
transformer may have to be added to the
system to provide 24v power.
C
OOLING
O
NLY
WITH
E
LECTRIC
H
EAT
U
NITS
Units with electric heat have a strip heater located
behind the evaporator coil. The control relay for the heater
in located on the circuit board in the control box. A limit
switch located on the heater end plate will interrupt power
to the heater should the airflow become compromised. If
temperatures rise above the limit setting a non-resetting one
time fuse link will burn and the heater will remain off.
The following current values apply when the unit is
connected to a 230v power supply. These values include fan
motor current:
3kw (13.5 amps)
4 kw (18 amps)
5kw (22.3 amps)
H
EAT
P
UMP
WITH
E
LECTRIC
H
EAT
Heat pump units with electric heat have five intercon-
necting
low volt
wires on both the indoor and outdoor units.
The yellow, red, white, orange, and brown wires of the air
handler should be connected to the corresponding yellow,
red, white, orange, and brown wires of the condenser. A 24v
transformer located in the condensing unit provides low volt
control power to both the air handler and condenser.
With high volt power supplied to the condenser, 24v
can be measured across the red (R) and brown (C) wires at
all times.
C
OOLING
The air handler will cycle the condenser on and off
through the yellow (Y) wire. To check for a condenser sig-
nal, place the indoor unit in cooling mode and choose a
setpoint temperature that is below room temperature. Then,
with a voltmeter, check for 24 volts across the yellow (Y)
and brown (C) wires.
EMIs heat pump systems utilize a reversing valve is
that is energized in the cooling mode. The reversing-valve
signal is provided through the orange (O) low volt wire. It
will remain energized constantly as long as the unit remains
in cooling mode. To check for 24v reversing valve voltage,
place a voltmeter across the brown (C) and orange (O) wires
while the indoor unit is in the cooling mode.
Image of Dipswitch on Control Board
