Daikin REYQ-AATJA, Service Manual, Page: 252 / 495

Field Setting from Outdoor Unit SiUS372201EA
245 Part 5 Field Settings and Test Operation
2.5.5 Heat Pump Lockout
New control logic to provide more application options for cold climates.
Outside temperature can now be measured directly from the outdoor unit coil sensor.
This field setting can switch automatically to emergency heat if there is a system fault.
Item Description Min Max Increments
Heat pump
lockout temperature
Below this temperature, heat
pump is locked out.
–15°F
(default)
50°F 5°F
Heat pump lockout
release differential
When the outdoor air temperature
is recovered by this temperature,
heat pump is resumed.
5°F, 10°F (default), 15°F
[2-16]: Auxiliary heater setting (Type I)
Value
[2-16]
Auxiliary heater
0 (default) OFF
1 ON
[2-37]: Auxiliary heater setting (Type II)
Value
[2-37]
Controlling mode
0 (default) OFF
1 Mode 1
2 Mode 2
3 Mode 3
4 Mode 4
5 Mode 5
6 Mode 6
Type Description
Actions
Field
setting
Shorted
between
Heating thermostat ON
Heating thermostat
OFF
Auxiliary
heater
Indoor
fan
Auxiliary
heater
Indoor
fan
I —
Heat pump heating is
always locked out
2-16: ON — ON ON (H/L) OFF LL
II
Mode 1
Lockout is controlled
by ABC terminals
2-37:
Mode 1
A-C
ON
ON (H/L)
OFF
LL
B-C OFF
Mode 2
(for a heater
which does not
need airflow)
2-37:
Mode 2
A-C
LL
LL
B-C OFF
Mode 3
Lockout is controlled
by the outdoor air
temperature and
setpoint which is
configured by the field
setting [2-78] and
[2-79]
2-37:
Mode 3
Same as 2-37: Mode 1 & A-C shorted
Mode 4
2-37:
Mode 4
Same as 2-37: Mode 1 & B-C shorted
Mode 5
2-37:
Mode 5
Same as 2-37: Mode 2 & A-C shorted
Mode 6
2-37:
Mode 6
Same as 2-37: Mode 2 & B-C shorted