MXZ-SM36NAMHZ Service Manual

110
OCH789
8-5. INTERNAL SWITCH FUNCTION TABLE
Switch
Step
Function
Operation in Each Switch Setting
Remarks Purpose Additional Information
ON OFF When to Set
SWU1
ones digit SWU2 tens digit
Rotary switch
Before turning the power ON
<Initial settings>
— —
SW1 Digital Display Switch
1–8
Can be set either during operation or not.
<Initial settings>
— —
SW2 Function Switch
1 Selects operating system startup
With centralized controller
Without centralized controller
Before turning the power ON
<Initial settings>
Turn ON when the centralized controller is connected to the outdoor unit.
SW2-1 must be turned ON if a central controller is connected to the system. An example of this would be a TC-24, EW-50A, AG150, AE50 or AE200. If SW2-1 is not turned on, while using a central controller, in rare circumstances problems may be encountered such as indoor units not responding to group commands. Therefore, turning SW2-1 ON is recommended if a central controller is used.
2
Connection Information Clear Switch
Clear Do not clear
When relocating units or connecting additional units.
—
3 Abnormal data clear switch input
Clear abnormal data
Normal
OFF to ON any time after the power is turned on.
To delete an error history.
4 Pump down ON OFF
During compressor running
To facilitate outdoor unit the pumping down operation. Frequency = Fixed to 65 Hz Indoor-linear expansion valve = Fully open Outdoor fan step = Fixed to 10
Please refer to a section referring to the pumping down on outdoor units Installation Manuals. It might not be possible to collect all the refrigerant if the amount is excessive.
5 Connect branch box Connect Not connect
Before the power is turned ON.
<Initial settings>
OFF
— —
6 — — — — — — —
SW4/ SW8/ (SW9) Model Switch
1–6
MODEL SELECTION 1:ON 0:OFF
Before the power is turned ON.
<Initial settings> Set for each capacity.
— —
SW3 Trial operation
1 ON/OFF from outdoor unit ON OFF
Any time after the power is turned ON.
<Initial settings>
— —
2 Mode setting Heating Cooling — —
SW5 Function switch
1 — — —
Can be set when o󰀨 or during operation
<Initial settings>
— —
2
Change the indoor unit's LEV opening at startup
Enable Normal
To set the LEV opening at startup higher than usual. (+150 pulses) To improve the operation with the LEV almost clogged.
The refrigerant ow noise at start- up become louder.
3 — — — — — 4 Auxiliary heater Enable Disable
Before the power is turned ON.
Turn ON when an auxiliary heater is connected. (It transmits a connection permission signal of the auxiliary heater to the connected CITY MULTI indoor unit.)
Turn ON only when the auxiliary heater is connected and operated.
5
Change the indoor unit's LEV opening at defrost
Enable Normal
Can be set when OFF or during operation
To set the LEV opening higher than usual during defrosting operation. (Only Qj
[
10 is valid, + 300 pulses)
To avoid the discharge temperature increase and provide efcient defrosting operation.
The refrigerant ow noise during the defrosting operation becomes louder.
6
Switching the target sub cool (Heating mode)
Enable Normal
To decrease the target sub cool value.
To reduce the discharge temperature decrease due to refrigerant liquid accumulation in the units.
A refrigerant ow noise might be generated if the sub cool value is too small.
The black square (■) indicates a switch position.
1
ON
OFF
2 3 4 5 6 7 8
SWU2
(tens digit)
0
1
2
3
4
5
6
7
8
9
SWU1
(ones digit)
0
1
2
3
4
5
6
7
8
9
1
ON
OFF
2 3 4 5 6 7 8
SWU2
(tens digit)
0
1
2
3
4
5
6
7
8
9
SWU1
(ones digit)
0
1
2
3
4
5
6
7
8
9
1
ON
OFF
2 3 4 5 6
1
ON
OFF
2 3 4 5 6
1
ON
OFF
2 3 4 5 6
1
ON
OFF
2 3
ON
OFF
1
ON
OFF
2 3
ON
OFF
MXZ-SM36NAM
SW4SW2 SW8 SW9
MXZ-SM48NAM
1
ON
OFF
2 3 4 5 6
1
ON
OFF
2
MXZ-SM60NAM
SW4 SW8
1
ON
OFF
2 3 4 5 6
1
ON
OFF
2 3 4 5 6
1
ON
OFF
2 3
ON
OFF
1
ON
OFF
2 3
ON
OFF
SW4 SW8 SW9
3
ON
OFF
SW9
1
ON
OFF
2
1
ON
OFF
2
SW2
1
ON
OFF
2
MXZ-SM36NAMHZ MXZ-SM42NAMHZ
1
ON
OFF
2 3 4 5 6
1
ON
OFF
2 3
ON
OFF
MXZ-SM48NAMHZ
SW2
1
ON
OFF
2
1
ON
OFF
2
1
ON
OFF
2
1
ON
OFF
2
1
ON
OFF
2 3 4 5 6 7 8
Continue to the next page