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The Ductless Split System of Choice
When trouble-shooting the indoor unit, please refer to
the wiring diagram that is supplied with the equipment. It is
located either on the back of the removable return air grill
(CNR and WHP/WCP) or on the back of the access panel
(CHP/CCP and FHP/FCP). If you are unable to locate the
wiring diagram please feel free to call the factory technical
service line at (800) 228-9364 and one can be faxed or
mailed. Please have the full model and serial number avail-
able prior to calling.
EMI
AmericaSeries
evaporators are designed to oper-
ate with EMI
AmericaSeries
condensers. The evaporator
(indoor unit) and condenser (outdoor unit) are to be inde-
pendently connected to the electrical service panel on sepa-
rate breakers. (See the unit name plate for the correct breaker
type and size). The indoor and outdoor units are also con-
nected to each other via a 24V interconnect wiring.
A trans-
former typically located in the condensing unit
provides
the low volt power source for the controls. The number of
low volt interconnect conductors will be three to five de-
pending on heating options. Cooling only and cooling with
electric heat units have three low volt wires. Heat pumps
with electric heat require five low volt interconnect conduc-
tors. Interconnect wire should be at least 18awg. Refer to
the unit wiring diagram for the interconnect diagram that
matches your system.
MAINTENANCE AND TROUBLESHOOTING PROCEDURE
for EMI Air Handlers with Unit Mount Infrared Controls
POWER SUPPLY CHECK
When trouble shooting any EMI product, it is important
to first check the rating plate for proper field voltage and
breaker size. Secondly using a volt meter check the incom-
ing power supply to see that it agrees with the rating plate.
The incoming power should not exceed the nameplate volt-
age. Also the incoming power should not be below the mini-
mum voltage stated on the rating plate (197V for units rated
208/230V and 104V for units rated 115V.
A check for low voltage power should also be made. By
placing a voltmeter across low volt terminals “R” and “C” at
the condenser there should be a reading of 24V.
After checking the condenser, a low voltage check to
the indoor unit can also be made. By placing a meter across
the red and brown low volt wires of the indoor unit there
should also be a reading of 24V.
TEST MODE
Use of the test mode feature can aid in the functional
check of the unit. It can also be a helpful tool when trouble-
shooting to help isolate a problem source.
While in test mode, all timers are eliminated. Avoid
short cycling the compressor. After system checks are
complete, the control must be returned to normal op-
eration. DO NOT LEAVE THE SYSTEM IN TEST
MODE!
To enter test mode the unit must first be in the
off state.
Next, using the unit mounted keypad depress both the
up
and
down
arrow buttons simultaneously and push the
On/
Off
button in for one second. The unit is now in test mode.
System function checks can now be made without having
to wait for timer delays. To return to normal operation, switch
the unit off again via the
On/Off
button for at least 30 sec-
onds. When the system is switched back on, normal op-
eration will resume.
!
!
CAUTION
MAINTENANCE
Service should be performed by a
qualified
service
agency and an annual system check is recommended. EMI
units are designed and constructed for reliability and long
life with minimal maintenance. You can insure peak oper-
ating efficiency by:
1. Cleaning air filters on a monthly basis: The filter is
accessed by removing the air intake access panel.
Clean with a vacuum cleaner that has a brush at-
tachment or use a garden hose. Allowing dust to
collect on the filter will cause the unit to lose effi-
ciency and eventually malfunction.
2. Vacuuming dust from the return air grille and coil sur-
face when cleaning the filter.
TROUBLESHOOTING
