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www.enviromaster.com
The Ductless Split System of Choice
HEATING
This unit is designed to utilize two stage heating. The
first stage being the compressor and the second is electric
heat. The air handler will cycle the condenser through the
yellow (Y) wire as it does in cooling however the reversing
valve will not be energized. To check for a condenser signal,
place the indoor unit in heating mode with the
Mode
button.
Next using the
Up
arrow place the set-point temperature
one degree above room temperature. Then, with a voltmeter
check for 24 Volts across the yellow (Y) and brown (C)
wires. The electric heat should be off at this point. Now with
the
up
arrow select a set-point temperature that is more
than two degrees above the room temperature. The electric
heat should energize along with the 24V-compressor signal
between Y and C. Check to see that the amp draw corre-
sponds with the electric heat rating.
The following current values apply when the unit is con-
nected to a 230V power supply. These values include in-
door fan motor current.
7KW = 31.0 AMPS
5KW = 22.3 AMPS
3KW = 13.5 AMPS
Units with electric heat utilize a control relay located
on the circuit board in the control box. As a safety feature,
an auto resetting limit switch located on the heater end
plate or on the heater assembly will interrupt power to the
heater should an over-heat condition occur. Each electric
heat assembly is also equipped with a one time fuse link.
Should electric heat temperatures rise above the auto re-
setting limit switch, a non-resetting, one time fuse link will
open and the heater will remain off.
ERROR CODES
Should for some reason one of the two temperature sen-
sors 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.
TROUBLESHOOTING PROCEDURE
Continued