18
English
FORCED OFF
ON/OFF OPERATION
SYSTEM/
EQUIPMENT
PROTECTION
Input A "on" to force a
s top
(operati on from remote
control l er prohi bi ted)
Uni t opera ted by
cha ngi ng
i nput A from "off" to "on"
Input A "off" to a l l ow
remote control l er
Uni t s topped by cha ngi ng
i nput A from "on" to "off"
Input A "off"
wi l l s top the
s ys tem and
di s pl a y the
a ppropri a te
error code.
Table 9
9.3
SETTING THE FILTER SIGN DISPLAY INTERVAL
The Return Air Filter should be cleaned regularly to prevent
clogging.
Explain to the customer that the ‘Time to clean filter’ message
on the controller is used as a reminder to clean/replace the
filter. The default display time is set to 2500 hours (equivalent
to 1 years’s use).
The filter dirt settings may be changed to accommodate the
operational conditions of the unit, or to meet customer prefer-
ences. For example, if the unit is installed in a dusty place,
the filter sign display should be set to a shorter time interval
(1,250 hours). See Table 10 for display settings.
01*
02
Filter dirt
0
Low
High
Display timer, hours (low/high)
1
2,500 /
1,250
10,000 /
5,000
Filter sign display
3
ON
OFF
*Factory set
SECOND CODE NO.
10 (20)
FILTER DISPLAY SETTINGS
MODE
NO.
FIRST CODE
NO.
Table 10
9.4
RETURN AIR FILTER
Each installation must include a return air filter. This filtering may
be performed externally such as a return air filter grille. Wash-
able versions are available through your local Daikin distributor.
•
Do not operate this product without all the ductwork attached.
GAS FURNACE SETTING
01 02
03
Run gas furnace during defrost/oil
return operation
Not
allowed
Not
allowed
Not
allowed
** Heat pump prohibition duration
15 min
30 min
45 min
07*
09
11
Run gas furnace during defrost/oil
return operation
Allowed Allowed Allowed
** Heat pump prohibition duration
15 min
30 min
45 min
*Factory set
**This time means the duration which CXTQ does not start heat pump operation after
starting a gas furnace. Applicable when the CXTQ operates heat pump and gas furnace
GAS FURNACE SETTING
MODE
NO.
FIRST
CODE NO.
SECOND CODE NO.
11 (21)
3
SECOND CODE NO.
11 (21)
3
GAS FURNACE SETTING
MODE
NO.
FIRST
CODE NO.
Table 11
When the defrost cycle is initiated, the discharge air tempera-
ture may fall for a short period of time. If at any time this be-
comes uncomfortable, the gas furnace operation during defrost
can be disabled using field setting 11(21)-3.
9.5.1
GAS FURNACE ON/OFF TEMPERATURE
SETTING
When the gas furnace is used to supplement the heat pump
heating, the gas furnace ON/OFF temperatures, Ton and Toff,
can be selected individually by switching the 1st code and 2nd
code according to the following table. This gas furnace control
will only work with restricted outdoor unit combination.
《Ton》＋
S ※
Heat Pump
Gas Furnace
《Toff》＋
S ※
0.9
°
F
ON
OFF
ON
OFF
SP (Set Point)
Room
temperature
0.9
°
F
Perform on-site setting using the remote controller.
Temperature difference must be 3.6ºF or more between “Ton”
and “Toff” to activate setting(s).
°F(°C)
01 02
03
04
05
06
07
Ton
1
-7.2*
(-4.0)
-6.3
(-3.5)
-5.4
(-3.0)
-4.5
(-2.5)
-3.6
(-2.0)
-2.7
(-1.5)
HP
ONLY
Toff
2
-3.6
(-2.0)
-2.7
(-1.5)
-1.8
(-1.0)
-0.9
(-0.5)
0*
(0)
0.9
(0.5)
HP
ONLY
*Factory set
11 (21)
SYMBOL
MODE
NO.
FIRST CODE
NO.
SECOND CODE NO.
Table 12
If you don't need to operate the gas furnace by this control,
change both settings 11(21) -1 and 11(21) -2 to second code
no. 07.
When there are two CXTQ coils connected to the same
residential outdoor unit, both field settings, 11(21)-1 and
11(21)-2 , must be set to “07”. Otherwise, the system will not
operate properly in heating mode.
