Daikin REYQ-XA, Service Manual

Page: 227 / 441

SiUS371901E Field Settings for Outdoor Unit
Field Settings and Test Operation 214
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.
[2-16]: Auxiliary heater setting (Type I)
[2-37]: Auxiliary heater setting (Type II)
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
temperature is recovered
by this temperature, heat
pump is resumed.
5°F, 10°F (default), 15°F
Value
[2-16]
Auxiliary heater
0 (default) OFF
1 ON
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