E-mail: [email protected]
Made in Rome, New York, USA
20
TROUBlESHOOTING pROCEdURE
Continued
is also equipped with a one time fuse link. Should electric
heat temperatures rise above the auto resetting limit switch,
a non-resetting, one time fuse link will open 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. If the supply power is different, this will in turn affect
the amp draw of the heater.
5kw = 22.3 amps, 4kw = 18 amps, 3kw = 13.5 amps.
Units With Condensate pumps
EMI Air handlers are available with an optional condensate
pump. Condensate pumps are recommended when it is not
possible to gravity drain the condensate from the indoor unit.
Depending on the pump manufacture the maximum lift for
the pump will vary. Consult the pump instructions for the
maximum lift for the particular pump being used.
Condensate generated by the air handler will collect in the
pumps’ reservoir. When the water level is high enough, a
float switch will close and energize the pump motor clearing
the water from the reservoir. Should for any reason the
water exceed the maximum preset level, a safety switch
will open, there by interrupting the (Y) signal. This will
prevent the air handler from generating more condensate
and spilling out of the unit.
Error Codes
Should for some reason one of the two temperature
sensors become disconnected or fail, an error code
will appear in the display. The control will not operate
properly until the sensor is working.
E1
– Coil Sensor malfunction or disconnected. Check
location
J1
on thermostat board.
E2
– Room Air Sensor malfunction or disconnected. Check
location
J2
on thermostat board.
q:
The display on the indoor unit is blank. What should I do?
A:
Check the power supply (see “Power supply check”
Section). If the unit still fails to turn on via the
On/off
button then inspect the control box for any apparent wires
that may have come loose during shipping. Also inspect
the circuit boards for burnt components. If no obvious
problem can be found then replace all circuit boards
including the unit keypad. Do not attempt to trouble shoot
the individual circuit boards.
q:
The display tends to flicker at times. Is this normal?
A:
A small amount of flickering of the display is normal.
Depending on the room lighting, flickering may be more
noticeable at some times than others.
q:
how long will the fan run?
A:
While the unit is in cooling or heating and auto fan
mode is selected, Fan speed will be determined by the
microprocessor and speed adjustment will be made
according to room and setpoint temperatures. The
fan will switch to
high
speed when room temperature
deviates by more than two degrees from setpoint. The
fan will switch to
Low
speed if the deviation is one
degree. When the room temperature reaches setpoint
temperature the heat/cool call is dropped. The fan will
then stay on for an additional 60 sec. to purge unit of any
residual energy. If
high
or
Low
is selected then the fan
will operate continuous regardless of set point or room
temperatures.
q:
What causes my indoor unit to freeze-up?
A:
Evaporator freeze up is usually the symptom of another
problem. Units with infrared compatible, unit mounted
controls are equipped with freeze protection to prevent
freeze up from occurring. If freeze up does occur then
check the following.
•
Check that the freeze sensor located in the lowest
part of the coil. Generally this is where freeze up
will begin.
• Check that the freeze sensor inserted fully and snug
in the coil fin. If not another location may need to be
selected. Be careful not to insert the sensor directly
into the coil tube rather insert the sensor between two
tubes.
• Check the indoor air filter. It should be clean and free
of dirt. A dirty filter will reduce airflow and efficiency.
Also check that the coil is clean. If the coil is dirty then
it should be cleaned using an appropriate coil cleaner
or mild detergent.
