Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 15

Signal wiring
between outdoor unit
and indoor units
Indoor unit
Connection cable
Interfase kit
(2) Unit No. may be set at random unless duplicated, it should be better to set orderly like 0, 1, 2..., F to avoid mistake.
(b) Display to the remote control
(i) Central or each remote control basis, heating preparation
The smallest unit No. among the operating units in the remote mode (or the center mode unless the remote
mode is available) is displayed.
(ii) Inspection display, filter sign
Any of unit that starts initially is displayed.
(iii) Confirmation of connected units
1) In case of RC-EX3A remote control
If you touch the buttons in the order of "Menu" → "Service setting" → "Service & Maintenance" → "Service
password" → "IU address" on the TOP screen of remote control, the indoor units which are connected are displayed.
2) In case of RC-E5 remote control
Pressing "AIR CON No." button on the remote control displays the indoor unit address. If " ▲ " " ▼ "
button is pressed at the next, it is displayed orderly starting from the unit of smallest No..
(c) In case of anomaly
If any anomaly occurs on a unit in a group (a protective function operates), that unit stops with the anomalous stop
but any other normal units continue to run as they are.
(d) Signal wiring procedure
Signal wiring between indoor and outdoor units should be made on each unit same as the normal wiring. For the
group control, connect with wiring between rooms using terminal blocks (X, Y) of interface kit.
Connect the remote control communication wire separately from the power source cable or wires of other electric
devices (AC220V or higher).
(10) Filter sign
As the operation time (Total ON time of ON/OFF switch) accumulates to 180 hours (1), "FILTER CLEANING" is displayed
on the remote control. (This is displayed when the unit is in trouble and under the central control, regardless of ON/OFF)
Notes (1) T ime setting for the filter sign can be made as shown below using the indoor function of wired remote control "FILTER SIGN SET". (It is set at 1 at
the shipping from factory.)
Filter sign setting
Setting 1
Setting 2
Setting 3
Setting 4
(2) After the setting time has elapsed, the "FILTER CLEANING" is displayed and, after operating for 24 hours further (counted also during the stop),
the unit stops.
(11) Outline of automatic operation
(a) Determination of operation mode
Operation mode is determined by indoor air temperature and outdoor air temperature as following.
Outdoor unit
* 1 * 1 * 1
0 1 2
Remote control wiring
R
Remote control
Function
Setting time: 180 hrs (Factory default)
Setting time: 600 hrs
Setting time: 1,000 hrs
Setting time: 1,000 hrs (Unit stop)
SP
Indoor air
Heating
temperature (˚C)
Outdoor air temperature (˚C)
14
-
Refrigerant piping
(Master unit) (Slave unit 1)
* 1 * 2 * 2
4 4
3
(Master) (Slave 1)
* 1:In case of SRK single use.
* 2:In case of SRK twin use.
(2)
Cooling
SP: Setting temperature
28
-
'22 • PAC-SM-422
* 1
F