ENVIROMASTER INTERNATIONAL LLC
10
The red indicator will be lit when the in-built time clock func-
tion is activated. To disable the time clock, all start/stop
times must be set to 12am via the transmitter (see program-
ming instructions in this installation manual). The red indi-
cator is also used to diagnose operational alarms.
SELF DIAGNOSTICS:
The microprocessor controller has a
built-in diagnostics feature so that, in the event of an alarm,
the nature of the fault can be determined. The red timer/
alarm LED flashes on the fascia in a pre-determined fre-
quency depending on the fault. These are identified below:
1. Red Timer/Alarm flashes once every second - in-
door coil sensor failure, low coil temperature or
condensate high level trip.
2. Red Timer/Alarm flashes once every 5 seconds -
return air sensor failure.
Refer to the Troubleshooting section of this
manual for further instruction on dealing with
alarms.
COMPRESSOR
230V AC
T E R M I -
10A FUSE
COMPRESSOR
HEAT OUTPUT
HEAT INPUT
230V AC
TERMINAL
TRANSFORMER
BATTERY
IR RE-
SENSOR
T1 = ROOM SENSOR
T2 = DEFROST INPUT
VANE MOTOR OUTPUT
CONDENSATE
INDOOR FAN
REVERSING VALVE
JUMPER
The infrared receiver is an extension of the control board and
is located on the fascia of the unit, connected by a 7 pin
plug and socket.
The green On/Off indicator will remain lit when the unit is
running or will flash if heating or cooling is required but the
compressor anti-cycle timer is delaying compressor opera-
tion.
Yellow indicators will illuminate to show when the unit is in
“cool” or “heat” mode. These indicators will flash when the
battery on the main circuit board requires changing.
The following pages contain a brief overview of the optional
cassette microprocessor control system and its components.
The Infra-Red Remote Control manual is available from the
unit manufacturer and provides a more comprehensive ex-
planation of the operation and application of the Cassette
microprocessor control system.
The microprocessor controller has built-in software to limit
the number of starts per hour. This operates by having a
minimum period of ten minutes between consecutive starts.
A four minute delay period between the compressor stop-
ping and starting is also included to allow refrigerant pres-
sures to equalize between high and low sides during the
compressor off period.
IMPORTANT:
Before applying main power to the unit,
please ensure jumper link “JMP2” is in the correct
position. JMP2 should be open for DX Non-Heat Pump
or Chilled Water systems and closed for Heat Pump
systems. (A jumper link settings guide can be found
on the Cassette unit’s wiring schematic).
MICROPROCESSOR CONTROLLER
INFRARED RECEIVER & FASCIA DISPLAY PANEL
