Identifying the model number
System Free indoor units
System Free indoor unit labels are located close to or on the electrical cover, except the Wall mounted which is located on the left hand side of the unit.
|Indoor units||Label location|
|Wall mount||Right hand side|
|4 way/mini/2way Cassette||Electrical cover inside filter cover|
|Floor mounted units||Electrical cover on the left hand side|
|Ceiling suspended||Fan guard|
|Yutaki S||Side of electrical box|
Example of Cassette
Example of Wall Mounted
Utopia and Set Free outdoor units have this located on the front or Right hand side of the unit.
|outdoor units||Label location|
|Utopia||Front or Right hand side/rear|
Example of Utopia outdoor unit
Room Air Conditioners
Room Air conditioners labels are located on the body of the indoor unit.
|Indoor units||Label location|
|Wall mounted||Right hand side|
|Cassette||Inside fan cowl|
|In the Ceiling (Ducted)||Right hand side|
|Floor mounted||Right hand side|
Example of In the Ceiling (Ducted) unit
Room Air conditioners outdoor unit labels are located on the right hand side of the unit.
Samurai Chillers labels are located on the inside of the electrical panel door.
Identifying the alarm
System free indoor units using PC-2H2/PC-P1H/PC-P2HTE/PC-ART
System free indoor units using PC-ARH
System Free indoor units using PC-2H
System Free (using Infra red controllers) and all Room air conditioners
The alarm will indicate by flashing LEDs on the front of the indoor units, the number of flashes will indicate the alarm code.
Utopia, Set Free and Yutaki outdoor units
The alarm will flash on the 7 segment display on the main PCB as a 2 digit number, if a 3 digit number is shown the 1st number identifies the indoor unit that it applies to or the circuit number associated with the fault i.e 01 19 would indicate indoor unit 1 has a 19 alarm (indoor fan motor overload) 02 23 would indicate a thermistor fault on compressor number 2.
Room air conditioners
The alarm is indicated by the number of times LD301-LD304 flashes, they will flash a number of times pause for a couple of seconds and repeat the sequence.
Will light the “Alarm” LED and show the alarm on the display PCB, this will indicate the circuit number on the left hand segments and the alarm code on the right hand segments.
Set Free, Utopia and Yutaki units can also display a number during operation, for instance P6 this indicates a protection is active, it is not necessarily a fault, this simply means the unit is performing an action to bring its operating parameters within guidelines. This is illuminated for the duration of the action and may appear and disappear at random. These may result in alarm if repeated several times in a set period of time (dependant of code).
Yutaki units will flash between PD 22 and P5 71 this is a normal indication and is showing the current refrigerant running pressures, in the instance above 22 bar Discharge (Pd) and 7.1 bar suction (PS) the lower display will change depending on the pressure. It can also show 88 awaiting enable signal, OF temperature satisfied, PUpump operation when stopped, PU awaiting pump feedback when running orHE unit running.
RAC units will permanently light LD303 when the compressor is running; it is also possible to see LD 301 and LD302 light in early overload condition with the unit continuing to operate.
Samurai units will flash numerically between C1 and C5 on the left hand display indicating the circuit number and 88 awaiting enable signal, OF thermo off (temperature satisfied) and C0 or HE on the right hand display indicating that the unit is running in cooling or heating mode.