Mitsubishi Heavy Industries SRK28HJ Technical Manual page 14

(3) Back-up Switch
When the remote controller batteries become weak, or if the remote controller is lost or malfunctioning, this switch may be used to
turn the unit on and off.
(a) Operation
Push the switch once to place the unit in the automatic mode. Push it once more to turn the unit off.
(b) Details of operation
The unit will go into the automatic mode in which it automatically determines, from room temperature (as detected by
thermistor), whether to go into the cooling, thermal dry or heating modes.
Function
Room temperature
setting
Operation mode
Cooling About 26ºC
Thermal dry About 25ºC
Heating About 25ºC
On operating in automatic operation mode by back-up switch, functions show in the above table are not altered, white, the other micro-
computer control functions remain effective.
(4) AUTOMATIC operation
(a) When starting operation after more than 1 hour since operation stops
(Operation stop button ON or ON-Timer), this system operates indoor fan with Lo for 20 seconds checks room temperature
and allowing decision of operating mode automatically.
Operation Mode
Note (1) Operating Mode is not altered due to change of room temperature.
When intended to change operating mode, switch operation change over dial to the intended mode.
(b) Established temperature (operate by the established temperature button on remote controller).
-6
Cooling
20
Thermal dry 19
Heating 19
(c) When switching to automatic operation during "Heating" "Cooling" "Dry" or when restarting with in 1 hour after stopping
with automatic operation mode, the former operating mode is selected. (In this case, 20 seconds Lo operation of indoor fan is
not performed). When the previous mode is in "FAN", operation mode is to be set by the above mentioned chart.
Fan speed Flap
Auto Natural flow
ON/OFF
Room temperature<21ºC
Heating
Wireless remote control signal (Indication)
-5 -4 -3 -2
21 22 23 24
20 21 22 23
20 21 22 23
12
-
Timer switch
Continuous
ack-upswitch
21ºC Room temperature<26ºC
Dry
±0
-1 +1 +2
25 26 27 28
24 25 26 27
24 25 26 27
-
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26ºC Room temperature
Cooling
+3 +4 +5 +6
29 30 31 32
28 29 30 31
28 29 30 31