Installation manual
27
EKHBH/ EKSWW150-300V3/Z2
Indoor unit for air to water heat pump and sanitary warm water tank for air to water heat pump system
4PW36978-1C
8H
Outlet water temperature of
indoor unit too high (>65°C)
• Check that the contactor of the
electric backup heater is not
short circuited.
• Check that the outlet water
thermistor is giving the correct
read out.
A1
Indoor unit PCB defective
Contact your local Daikin dealer.
A5
Too low (during cooling
operation) or too high (during
heating operation) refrigerant
temperature (measured by R3T)
Contact your local Daikin dealer.
AA
Booster heater thermal protector
is open (applies only to
installations with a sanitary water
tank)
Reset the thermal protector
(refer to
for location of the reset
button)
Secondary thermal protector is
open (applies only to units with a
EKSWWU sanitary water tank
installed)
Reset the thermal protector
(refer to
for location of the reset
button)
Backup heater thermal protector
is open
Reset the thermal protector by
pressing the reset button (refer
to
for location of the reset button)
Check the reset button of the
thermal protector.
If both the thermal protector and
the controller are reset, but the
AA
error code persists, the
backup heater thermal fuse has
blown.
Contact your local Daikin dealer.
C0
Flow switch failure (flow switch
remains closed while pump is
stopped)
Check that the flow switch is not
clogged with dirt.
C4
Heat exchanger thermistor
failure (heat exchanger
temperature sensor broken)
Contact your local Daikin dealer.
E1
Outdoor unit PCB defective
Contact your local Daikin dealer.
E3
Abnormal high pressure
Check that the unit is operating
within its operating range (refer
to
).
Contact your local Daikin dealer.
E4
Actuation of low pressure sensor
Check that the unit is operating
within its operating range (refer
to
).
Contact your local Daikin dealer.
E5
Overload activation of
compressor
Check that the unit is operating
within its operating range (refer
to
).
Contact your local Daikin dealer.
E7
Fan lock failure (fan is locked)
Check if the fan is not obstructed
by dirt. If the fan is not
obstructed, contact your local
Daikin dealer.
E9
Malfunction of electronic
expansion valve
Contact your local Daikin dealer.
EC
Sanitary water temperature too
high (>89°C)
• Check that the contactor of the
electric booster heater is not
short circuited.
• Check that the sanitary water
thermistor is giving the correct
read out.
F3
Too high discharge temperature
(e.g. due to outdoor coil
blockage)
Clean the outdoor coil. If the coil
is clean, contact your local
Daikin dealer.
H3
Malfunctioning HPS system
Contact your local Daikin dealer.
H9
Outdoor temperature thermistor
failure (outdoor thermistor is
broken)
Contact your local Daikin dealer.
HC
Sanitary water tank thermistor
failure
Contact your local Daikin dealer.
J1
Malfunction of pressure sensor
Contact your local Daikin dealer.
J3
Discharge pipe thermistor failure
Contact your local Daikin dealer.
J5
Suction pipe outdoor unit
thermistor failure
Contact your local Daikin dealer.
J6
Aircoil thermistor frost detection
failure
Contact your local Daikin dealer.
Error
code
Failure cause
Corrective action
J7
Aircoil thermistor mean
temperature failure
Contact your local Daikin dealer.
J8
Liquid pipe outdoor unit
thermistor failure
Contact your local Daikin dealer.
L4
Electric component failure
Contact your local Daikin dealer.
L5
Electric component failure
Contact your local Daikin dealer.
L8
Electric component failure
Contact your local Daikin dealer.
L9
Electric component failure
Contact your local Daikin dealer.
LC
Electric component failure
Contact your local Daikin dealer.
P1
PCB failure
Contact your local Daikin dealer.
P4
Electric component failure
Contact your local Daikin dealer.
PJ
Failure of capacity setting
Contact your local Daikin dealer.
U0
Refrigerant failure (due to
refrigerant leak)
Contact your local Daikin dealer.
U2
Main circuit voltage failure
Contact your local Daikin dealer.
U4
Communication failure
Contact your local Daikin dealer.
U5
Communication failure
Contact your local Daikin dealer.
U7
Communication failure
Contact your local Daikin dealer.
UA
Communication failure
Contact your local Daikin dealer.
Error
code
Failure cause
Corrective action