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SERVICING
ment to prevent overheating of components in case of low
airflow. This limit control will open its circuit at approximately
150°F. to 160°F and close at approximately 110°F.
Disconnect ALL power before servicing.
1. Remove the wiring from the control terminals. Using an
ohmmeter test for continuity across the normally closed
contacts. No reading indicates the control is open - re-
place if necessary. Make sure the limits are cool before
testing.
IF FOUND OPEN - REPLACE - DO NOT WIRE AROUND.
S-52 CHECKING HEATER ELEMENTS
Optional electric heaters may be added, in the quantities
shown in the spec sheet for each model unit, to provide
electric resistance heating. Under no condition shall more
heaters than the quantity shown be installed.
HIGH VOLTAGE
DISCONNECT ALL POWER BEFORE SERVICING OR
INSTALLING THIS UNIT. MULTIPLE POWER SOURC-
ES MAY BE PRESENT.
FAILURE TO DO SO MAY
CAUSE PROPERTY DAMAGE, PERSONAL INJURY
OR DEATH.
1. Disassemble and remove the heating element(s).
2. Visually inspect the heater assembly for any breaks in
the wire or broken insulators.
3. Using an ohmmeter, test the element for continuity - no read-
ing indicates the element is open. Replace as necessary.
S-60 ELECTRIC HEATER (OPTIONAL ITEM)
Optional electric heaters may be added, in the quantities
shown in the specifications section, to provide electric resis-
tance heating. Under no condition shall more heaters than
the quantity shown be installed.
The low voltage circuit in the air handler is factory wired and
terminates at the location provided for the electric heater(s).
A minimum of field wiring is required to complete the instal-
lation.
Other components such as a Heating/Cooling Thermostat
and Outdoor Thermostats are available to complete the in-
stallation.
HEATER KIT CAPACITY SETTING (DV*PEC):
For heater kit installation, it is important to set the capacity
of the electric heater at the communicating thermostat and
DIP switch.
26
WARNING
WARNING
Setting with communicating thermostat:
For a detailed procedure of thermostat heater kit capacity
selection process, please visit the DAIKIN ONE+ SMART
THERMOSTAT website at http://www.daikinone.com (If us-
ing a CTK04 thermostat, please see the addendum for fur-
ther instructions.)
Setting with DIP Switch:
In the event of loss communication, emergency mode can
be activated. In emergency mode operation, heater kit se-
lection will be driven by the DIP switch (S9, S10, S11, and
S12) selection from the control board on indoor unit. For fur-
ther detail, read an emergency mode section in this manual.
The heating mode temperature rise is dependent upon the
system airflow, the supply voltage, and the heater kit size
(kW) selected. Use data provided in below Table to deter-
mine the temperature rise (°F).
HEAT KIT NOMINAL kW
CFM
3
5
800
12
19
23
1000
9
15
19
1200
8
12
15
1400
7
11
13
1600
6
9
12
1800
5
8
10
2000
5
7
240/1/60 SUPPLY VOLTAGE - TEMP. RISE °F
HEAT KIT NOMINAL kW
CFM
3
5
800
11
18
22
1000
9
14
18
1200
7
12
15
1400
6
10
13
1600
6
9
11
1800
5
8
10
2000
4
7
230/1/60 SUPPLY VOLTAGE - TEMP. RISE °F
HEAT KIT NOMINAL kW
CFM
3
5
800
10
17
21
1000
8
13
17
1200
7
11
14
1400
6
10
12
1600
5
8
10
1800
5
7
2000
4
7
220/1/60 SUPPLY VOLTAGE - TEMP. RISE °F
6
8
10
15
19/20
31
37
25
30
44
21
25
37
18
21
32
15
19
28
14
16
25
9
12
15
22
6
8
10
15
19/20
30
35
24
28
42
20
24
35
17
20
30
15
18
27
13
16
24
9
12
14
21
6
8
10
15
19/20
28
33
22
27
40
19
22
33
16
19
29
14
17
25
9
12
15
22
8
11
13
20
25
49
62
42
53
37
46
33
41
30
37
25
47
59
40
51
35
44
31
39
28
35
25
45
56
38
48
33
42
30
37
27
33
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