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6. External Heater
6.4. Dip switch setting for outdoor units and indoor units
(1) Heater control
* Table 1 shows how the field-installed heater is controlled. Select the desired pattern in the table below, and set the DIP switch on the outdoor as shown in Table 1.
The table below shows Heater Control patterns #A and B.
Table.1
Outdoor unit setting
DIP switch OFF
In the case of:
<TGMU>
S/W5-2 OFF
<YHMU>
S/W5-10 OFF
<PUMY>
S/W4-4 OFF
DIP switch ON
In the case of:
<TGMU>
S/W5-2 ON
<YHMU>
S/W5-10 ON
<PUMY>
S/W4-4 ON
Parameters a/b/c/d are set by
maintenance tool.
Table.2
Heater OFF Inlet air temp. • set temp.
Heater control #A
Heater ON Inlet air temp. < set temp.-4F
Inlet air temp.
Heater output
Note:
<For heater>
Initial setting: 4ºC (can be set to a value between 1.8 and 9ºF)
Note:
(1) Back-up heating will not be performed when the heater turns on while demand control is performed (not a request item).
(2) This is applicable only to the R410A series. Make the settings for the following dipswitches on the outdoor unit control board before switching on the power.
(2) Fan control
Note: *Depend on SW1-7/1-8(Heater ON)
SW3-1
SW1-7
SW1-8
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
ON
ON
ON
ON
ON
Reference (not applicable to the ducted models)
CN22 for FAN control (YU25)
N/A
7. Test run (Fig. 7-1)
F
E
D
B
TEST RUN
C
COOL, HEAT
°F
°F
SIMPLE
TEMP.
ON/OFF
MENU
ON/OFF
FILTER
BACK
MONITOR/SET
DAY
CHECK
TEST
PAR-21MAA
CLOCK
OPERATION
CLEAR
HG
I
M
Fig. 7-1
Condition of outdoor unit
N/A
Normal drive
Defrost drive
H/P drive
H/P stop
Outdoor temp.
a b c
d
Heater control #B
Set temp.
Inlet air temp.
Set temp.-1.8F
Set temp.-4F
Heater output
ON
OFF
*1 Fan speed
Very low
Low
Remote controller setting
STOP (*2 Remote controller setting)
STOP
NON duct unit (PL/PK/PC)
DIP switch (Indoor unit)
N/A
A ON/OFF button
B Test run display
C Indoor temperature liquid
line temperature display
D ON/OFF lamp
E Power display
F Error code display
Test run remaining time
A
display
G Set temperature button
H Mode selection button
I Fan speed button
M TEST button
NON duct unit (PL/PK/PC)
Heater control #A
(defrost/error: Heater ON)
Normal drive
Heater OFF
Defrost drive
Heater control #B
H/P drive
(defrost/error: Heater ON)
H/P stop
Heater OFF Inlet air temp. • set temp.
Heater ON Inlet air temp. < set temp.-1.8F
ON
OFF
Note:
*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.
Fan in defrost
Stop (Heater ON)
1 Turn on the power at least 12 hours before the test run.
2 Press the [TEST] button twice. ” "TEST RUN" liquid crystal display
3 Press the [Mode selection] button. ” Make sure that wind is blown out.
4 Press the [Mode selection] button and switch to the cooling (or heating) mode.
” Make sure that cold (or warm) wind is blown out.
5 Press the [Fan speed] button. ” Make sure that the wind speed is switched.
6 Check operation of the outdoor unit fan.
7 Release test run by pressing the [ON/OFF] button. ” Stop
8 Register a telephone number.
The telephone number of the repair shop, sales office, etc., to contact if an
error occurs can be registered in the remote controller. The telephone number
will be displayed when an error occurs. For registration procedures, refer to the
operation manual for the indoor unit.
Set temp.
Set temp.-1.8F
9
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