28
1.3
Digital Display Parameter Output
On pressing the button on a digital display panel the parameters given in Table 3.2 are displayed (unless the unit is
in an error state, in which case the digital display displays the error code). On the first press, parameter no. 1 is
displayed, on the second press, parameter no. 2 is displayed, and so on. If the button is not pressed for 10 seconds,
the display returns to its normal output, as described in Table 3.1.
Figure 3.3: Button on a digital display panel
Table 3.2: Digital display output when button on a digital display panel is pressed
Parameter
no.
Parameters
Remarks
1
Communication address
1
0 - 63
2
Capacity as set on switch ENC1 on indoor unit main PCB
Unit: HP
3
Network address
1
0 - 63
4
Set temperature
5
Indoor ambient temperature
Minimum value -9°C
6
Reserved - indoor ambient temperature
2
Minimum value -9°C
7
Indoor heat exchanger mid-point temperature
Minimum value -9°C
8
Indoor heat exchanger outlet temperature
Minimum value -9°C
9
Most recent error code
“
E-
“
is displayed if no error code has occurred since the unit
was powered on
10
--
Notes:
1.
On indoor units, the communication address and network address are the same and are routinely referred to simply as the unit
’
s
“
address
”.
2.
Parameter no. 6 is reserved for future use. Currently, it displays the indoor ambient temperature.
1.4
Four LED Display Parameter Output
1.4.1
Unit address
On pressing the MANUAL button on a four LED display panel
continuously for 5 seconds the unit’s address is
indicated by the statuses of the four LEDs and the alarm.
Figure 3.4: MANUAL button on a four LED display
panel
