Trane Mitsubishi Electric TPEFYP006MA143A Technical And Service Manual page 26

[ VII Microprocessor Control ]
Table.2
Heater OFF
Inlet air temp.
Heater control #A
Heater ON
Inlet air temp. < set temp.-4°F
Inlet air temp.
Heater output
<For heater>
The value "4°F" is modifiable from 1.8°F to 9°F by maintenance tool.
(1) On the ducted model units (except the Fresh air intake type), turning on the heater with the fan setting set to OFF requires that
the DIP S/W and connectors on the indoor units*1 are set on site.
*1: DIP SW 3-4, CN24, and CN4Y (or CN22)
Fan control
Pattern
CN4Y or CN22 for FAN control
(YU25)
1
Disabled
2
3
Enabled
4
*1. depend on SW1-7/1-8
SW3-1 SW1-7
OFF OFF
OFF ON
OFF OFF
OFF ON
ON ON
*1. The fan operates at the same speed settings as shown in this table during
the Heating Thermo-OFF mode.
*2. If Pattern 2 in the table above is selected for the fan control pattern, the
fan will follow the setting of the remote controller.
<Image>
CN4Y or CN22 for FAN control
(PAC-YU25HT)
(2) On the Fresh air intake type units, the heater cannot be turned on with the fan setting set to OFF.
(3) Non-ducted models do not require the settings described in Note (1) above.
HWE1832A
set temp.
Set temp.
Set temp.-1.8°F
Set temp.-4°F
ON
OFF
DIP S/W3-4 (Indoor unit)
OFF
ON
OFF
ON
SW1-8 Fan speed
OFF Very low
OFF Low
ON Remote controller setting
Stop
ON
(Remote controller setting
Stop
ON
(Remote controller setting
Heater control #B Heater OFF
Inlet air temp.
Heater ON
Inlet air temp. < set temp.-1.8°F
Inlet air temp.
Heater output
Ducted unit
*1
*2
)
*2
)
Indoor unit Control board
- 19 -
set temp.
Set temp.
Set temp.-1.8°F
ON
OFF
Fan in defrost
Stop (Heater OFF)
*1
L / LL / Set (Heater ON)
Stop (Heater OFF)
Stop (Heater ON)
GB