Daikin VRV RXYQ72AATJ Series, Installation Manual

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40 English
[2-52]= AUX heater max allowable temp release differential
AUX Heater is not allowed to energize when the outdoor
ambient temp is recovered by differential (below) above the
AUX Heater Max Allowable Temp.
Value
[2-52]
Fahrenheit ( °F) Celsius ( °C)
0 5 2.8
1 10 (default) 5.6 (default)
2 15 8.3
15.2.4. Heat pump lockout
• Control logic to provide more application options for cold climates.
• Outside temperature can now be measured directly from the out-
door unit coil sensor.
• This heat pump system can also be programed to automatically
switch to emergency heat is there is a system fault.
Item Description Min Max Increments
Heat Pump
Lockout Temp
Below this tempera-
ture, heat pump is
locked out.
− 15°F
(-26.1°C)*
50°F
(10°C)
5°F
(2.8°C)
Heat Pump
Lockout
Release dif-
ferential When the outdoor
temp is recovered by
this temp, heat pump
is resumed.
5°F (2.8°C)
10°F (5.6°C)*
15°F (8.3°C)
* Default
[2-16]= AUX heater setting (Type
I
)
Value
[2-16]
AUX heater Description
0 OFF Function not active
1 ON Heat-pump heating is always locked out
Value
[2-16]
Actions
Shorted
between
Heating Thermo-on Heating Thermo-off
AUX
heater
Indoor
fan
AUX
heater
Indoor
fan
0 − − − − −
1 − ON
ON
(H/L)
OFF LL
[2-37]= AUX heater setting (Type
II
)
Value
[2-37]
Controlling mode Description
1 Mode 1
Lockout is controlled by ABC
terminals
2 Mode 2 *
3 Mode 3 Lockout is controlled by the
outdoor ambient tempera-
ture and setpoint which is
configured by the field set -
ting 2-47 and 2-65
4 Mode 4
5 Mode 5
6 Mode 6
* For a heater which doesn’t need airflow
Value
[2-37]
Actions
Shorted
between
Heating Thermo-on Heating Thermo-off
AUX
heater
Indoor
fan
AUX
heater
Indoor
fan
1
A-C
ON
ON
(H/L)
OFF
LL
B-C OFF
2
A-C LL LL
B-C LL OFF
3 Same as 2-37 = Mode 1 & A-C shorted
4 Same as 2-37 = Mode 1 & B-C shorted
5 Same as 2-37 = Mode 2 & A-C shorted
6 Same as 2-37 = Mode 2 & B-C shorted
[2-47]= Heat pump lockout release differential
Heat pump would be resumed when the outdoor ambient
temp is recovered by differential (below) above the Heat
Pump Lockout Temp.
Value
[2-47]
Fahrenheit ( °F) Celsius ( °C)
0 5 2.8
1 10 (default) 5.6 (default)
2 15 8.3
When HP lockout mode has been set the auto backup func-
tion will automatically be set. This will allow the auxiliary or
secondary heat source to be automatically energized in the
event of a system failure.
Error codes capable of auto backup are listed in the table below.
Please be aware that the error codes that are not listed do
not auto backup in order to protect the unit.
Error contents
Error code
(Auto
backup
possible)
Actuation of high pressure switch E3
Actuation of low pressure sensor E4
Inv. compressor motor lock E5
Compressor damage alarm E6
Outdoor unit fan motor abnormality E7
Electronic expansion valve coil abnormality E9
Position signal abnormality of outdoor unit
fan motor H3
H7
Outdoor air thermistor (R1T) abnormality H9
Discharge pipe temperature abnormality F3
Wet alarm F4
Discharge pipe thermistor (R13T, R15T) and
compressor surface temperature thermistor
(R14T, R16T) abnormality
J3
Suction pipe thermistor (R5T) abnormality J5
Heat exchanging deicer thermistor (R3T,
R10T) and heat exchanger gas pipe therm-
istor (R11T, R12T) abnormality
J6
Liquid temperature sensor (after subcool HE)
malfunction (R7T, R8T)
J7
Heat exchanger liquid pipe thermistor (R2T,
R9T) abnormality
J8
Subcooling heat exchanger gas pipe therm-
istor (R6T) and E.BOX Air cooling pipe
thermistor (R4T) abnormality
J9
High pressure sensor abnormality JA
Low pressure sensor abnormality JC
Inverter PCB abnormality L1
Reactor temperature rise abnormality L3
Inverter radiation fin temperature rise
abnormality
L4
Inv. compressor instantaneous overcurrent L5
Inv. compressor overcurrent L8
Inv. compressor startup abnormality L9
Transmission error between inverter and
control PCB
LC
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