7
LOCK — In Settings mode, press the LOCK button and the
up arrow button at the same time to lock or unlock the opera-
tion mode setting for the system. Press and hold the QUERY
button and press the LOCK button to lock or unlock the central
controller touchpad.
RESET — Press and hold the RESET button for 5 seconds to
reset the central controller to factory defaults.
Filter Cleaning —
As set by the factory, error code EC
(change/clean filter reminder) is displayed for a unit when
2500 run time hours have elapsed.
A custom reminder and run time can be set instead. When
the custom filter reminder is turned on and the specified run
time hours have elapsed, the controller displays 88, which is
the custom filter reminder function code. After the filter is
cleaned, clear the code by pressing and holding the SWING
button and pressing the QUERY button at the same time. To set
a custom filter cleaning reminder, follow these steps:
1.
Set DIP switch 3 on the central controller to ON (default
is OFF). See Fig. 12.
2.
Power on the controller.
3.
Wait 1 minute.
4.
Press and hold the QUERY button and press the FAN
button at the same time. The controller displays 88 (the
display flashes).
5.
Use the INC and DEC buttons to set the appropriate func-
tion as shown below.
6.
Press OK.
7.
Use the INC and DEC buttons to select the code for the
number of run time hours as shown below.
8.
Press OK. The controller displays the function code 88
and a “setting successfully” message. After 3 seconds the
Main screen is displayed.
TROUBLESHOOTING
The fault screen is displayed when an error is detected.
Fig. 13 shows an example. See Table 2 for a list of error codes.
a40-1888
Fig. 11 — Query Mode Display Screen (Example)
In this example:
1. The indoor unit with the address 01 is being queried.
2. The unit is in Cooling mode, the fan speed is High, Swing mode is on,
and the set point is 72 F. The room temperature is 74 F.
3. In the address grid, only the large and small blocks at addresses
00+,00 and 00+,01 are lit. This means only the indoor units with the
addresses of 00 and 01 are connected and powered on.
ON
1
2
3
a40-1891
Fig. 12 — DIP Switch Settings
DIP SWITCH
ON
OFF
1
3-Pipe Controller
2-Pipe Controller
(Default)
2
Fahrenheit
(Default)
Celsius
3
Optional Filter
Reminder
No Optional Filter
Reminder
(Default)
FUNCTION CODE
FUNCTION SETTING
00
Filter reminder off
01
Filter reminder on
PARAMETER CODE
TIME (HOURS)
00
0
01
1,250
02
2,500
03
5,000
04
10,000
