Sea Breeze PTAC Service Manual page 19

iv) WARMER and COOLER: To adjust the setting temperature by pressing these two buttons; or set
timer within 0 - 24 hours while in TIMER setting status. In 10 hour timer, the time is adjusted
every 0.5 hour for each pressing. Above 10 hour timer, the time is adjusted every 1 hour for each
pressing.
2) Digital display and LED display
There are 13 LEDs which are HIGH, LOW, AUTO, COOL, DRY, FAN, HEAT, ON/OFF, SETPOINT (setting
temperature), INDOOR (room temperature), ON/OFF and STATUS (This LED is on the PC board), TIMER.
a) Mode LED: when the unit is running in a certain kind of mode, the corresponding LED is illuminated.
b) ON/OFF LED: The LED is green when the unit is running. The LED is red when the unit is turning off.
c) Fan speed LED: When the unit is running at high, low or auto fan speed, the corresponding LED is
illuminated.
d) The digital display
i) In cooling and heating mode, it displays the setting temperature. In fan mode, it displays the room
temperature.
ii) Error Codes: When the unit is energized, the STATUS LED illuminates. If there is any
malfunction or protection, the STATUS LED will blink with the Error code.
When the unit is in the OFF status, there is not an error code showing (except the low
temperature resistant protection), and the protections - 6, 7, 8 in the following table will be
illuminated. If there are multiple protections or failure, it activates with the priority which is
decreasing from 1 to 8.
1 Room temp. sensor open/short
2 Indoor coil sensor open or short
3 Outdoor coil sensor open/short
4 Air outlet temperature sensor open/short
5 Low temperature protection
6 Thermostat wiring error
7 High temp. protection for evaporator
8 High temp. protection for condenser
9 Freeze protection for evaporator
10 Defrost (heat pump type)
11 Refrigerant lacking protection
12 Compressor over-current protection
13 Protection for electric heater error
In OFF mode, digital display will not show the error code (except the low temperature protection), and number 6,
7, 8 protection marks will be eliminated. When multiple protections are overlapped, it activates only the
protection with the highest priority.
4. Especial Functions
1) Energy Management Input (Front Desk Control)
"EM": It is used for energy management input. When the terminal 24 VAC is connected, the unit will be
turned off and the unit is in OFF mode.
The control panel or thermostat is invalid at this time. If there is no signal (0 VAC), the unit can be operated
by the control panel or thermostat. The wall thermostat is ignored when the unit is turned off by EM, and it
Digital display 'F1', with STATUS light flash
Digital display 'F2', with STATUS light flash
Digital display 'F4', with STATUS light flash
Digital display 'FJ', with STATUS light flash
Digital display 'FP', with STATUS light flash
STATU LED flash 9 times and off 3 sec circularly
STATU LED flash 8 times and off 3 sec circularly
STATU LED flash 6 times and off 3 sec circularly
STATU LED flash 5 times and off 3 sec circularly
STATU LED flash 7 times and off 3 sec circularly
Digital display 'F0'
Digital display 'E5'
Digital display 'A2'
~17~