16
English
R C
2
1
(SUB)
(MAIN)
Remote
Controller
(Option)
For use with 2
remote controllers
Figure 22
8.6
CONTROL BY 2 REMOTE CONTROLLERS
Controlling 1 indoor unit by 2 remote controllers
When using 2 remote controllers, one must be set to “MAIN”
and the other to “SUB”.
Refer to the installation manual of the controller for setting
the “MAIN” and “SUB” controller.
PRECAUTIONS
•
Daisy chain wiring is needed when using group control
and 2 remote controllers at the same time.
•
Connect the indoor unit at the end of the crossover wire
(P1, P2) to remote controller 2 (SUB).
Remote controller 1
(MAIN)
Indoor unit 1
Indoor unit 2
Max. No. of
indoor units
Daisy chain wire (P1, P2)
Remote controller 2
(SUB)
Figure 23
8.7
REMOTE CONTROL (FORCED OFF, ON/OFF,
AND SYSTEM/EQUIPMENT PROTECTION
OPERATION)
•
Connect input lines from the outside to the terminals T1 and T2
on the terminal block (8P) to achieve remote control or Sys-
tem/Equipment Protection. Use wiring specification Table 4
when making connection to T1/T2. See Figure 24.
T1
T2
Input A or Alarm Switch
Figure 24
Sheathed vinyl cord or cable (2 wires)
AWG18 - 16
Max. 328 ft.
Wire specification
Gauge
Length
External terminal
Contact that can ensure the minimum
applicable load of 16 V DC, 1mA.
Table 4
•
In the case of Forced Off and On/Off operation
The user can use this function for occupancy sensors, door
switch interlocks etc. (i.e. in hotels so the unit won’t run when
the door is open). When configured as “Forced Off” or “On/
Off”, no error code will be displayed when operating T1/T2.
•
In the case of System/Equipment Protection
The user can use this function as an alarm switch. When the
alarm switch is open the controller will respond by turning off
the system (including the heat pump and all associated indoor
units). The proper error code will then be displayed on the con-
troller.
•
See the
“9.2 REMOTE CONTROL SETTING (T1, T2)”
for
details on operation.
8.8
AUXILIARY ALARM SWITCH
The CXTQ control board is equipped with two Auxiliary Alarm ter-
minals, labeled TB4 and TB5 (2VA or less) which are typically uti-
lized in series with a condensate switch.
The auxiliary alarm switch must be normally closed. The switch
should only be open when the alarm occurs. For example, a nor-
mally closed condensate switch will open when the base pan’s
water level reaches a particular level. The control will respond by
turning off the blower motor of the affected unit and displaying the
proper fault codes.
