Error Codes - Daikin EKCBX008BBV3 Installation Manual

16.3. Error codes

When a safety device is activated, the user interface LED will be
flashing, and an error code will be displayed.
A list of all errors and corrective actions can be found in the table
below.
Reset the safety by turning the unit OFF and back ON.
Instruction to turn the unit OFF
User interface mode Domestic water
(heating/cooling =)
heating mode (w)
ON ON
ON OFF
OFF ON
OFF OFF
A list of all errors and corrective actions can be found in the table
below.
Error
code Failure cause
Inlet water temperature
80
thermistor failure (inlet water
thermistor broken)
Outlet water temperature
81
thermistor failure (outlet water
temperature sensor broken)
Water heat exchanger freeze-up
89
failure (due to water flow too low)
Water heat exchanger freeze-up
failure (due to refrigerant
shortage)
Flow failure (water flow too low
7H
or no water flow at all, minimum
required water flow is 12 l/min)
Outlet water temperature of
8H
indoor unit too high (>65°C)
Indoor unit PCB defective
A1
Too low (during cooling
A5
operation) or too high (during
heating operation) refrigerant
temperature (measured by
R13T)
EKCBX/H008BBV3
Unit for air to water heat pump system
4PW66983-1C – 08.2011
Push the y
Push the
v button
button
1 time 1 time
1 time —
— 1 time
— —
Corrective action
Contact your local dealer.
Contact your local dealer.
Refer to error code 7H.
Contact your local dealer.
• Check that all shut-off valves of
the water circuit are completely
open.
• Check if the water filter needs
cleaning.
• Check that the unit is operating
within its operating range (refer
to "Technical specifications" on
page 44).
• Also refer to the chapter
"Charging water" in the outdoor
unit installation manual.
• Make sure there is no air in the
system (purge air).
• Check on the manometer that
there is sufficient water
pressure. The water pressure
must be >1 bar (water is cold).
• Check that the pump speed
setting is on the highest speed.
• Make sure that the expansion
vessel is not broken.
• Check that the resistance in the
water circuit is not too high for
the pump (refer to the chapter
"Setting the pump speed" in the
outdoor unit installation manual).
• If this error occurs at defrost
operation (during space heating
or domestic water heating),
make sure that the backup
heater power supply is wired
correctly and that fuses are not
blown.
• If EKHWSU version of domestic
hot water tank is installed, check
if the setting of the additional
thermostat in the tank switch box
is correct (≥50°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.
Contact your local dealer.
Contact your local dealer.
Error
code Failure cause
Backup heater thermal protector
AA
is open
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.
Booster heater thermal protector
AC
is open (applies only to
installations with a domestic hot
water tank)
Secondary thermal protector is
open (applies only to units with a
EKHWSU domestic hot water
tank installed)
Flow switch failure (flow switch
C0
remains closed while pump is
stopped)
Heat exchanger thermistor
C4
failure (heat exchanger
temperature sensor broken)
Outdoor unit PCB defective
E1
Abnormal high pressure
E3
Actuation of low pressure sensor
E4
Overload activation of
E5
compressor
Fan lock failure (fan is locked)
E7
Malfunction of electronic
E9
expansion valve
Domestic hot water temperature
EC
too high (>89°C)
Too high discharge temperature
F3
(e.g. due to outdoor coil
blockage)
Malfunctioning HPS system
H3
Outdoor temperature thermistor
H9
failure (outdoor thermistor is
broken)
Domestic hot water tank
HC
thermistor failure
Malfunction of pressure sensor
J1
Discharge pipe thermistor failure
J3
Suction pipe outdoor unit
J5
thermistor failure
Aircoil thermistor frost detection
J6
failure
Aircoil thermistor mean
J7
temperature failure
Liquid pipe outdoor unit
J8
thermistor failure
Electric component failure
L4
Electric component failure
L5
Electric component failure
L8
Electric component failure
L9
Electric component failure
LC
PCB failure
P1
Corrective action
Reset the thermal protector by
pressing the reset button (refer
to "5.2. Main components of the
indoor unit" on page 5 for
location of the reset button)
Contact your local dealer.
Reset the thermal protector
Reset the thermal protector
Check that the flow switch is not
clogged with dirt.
Contact your local dealer.
Contact your local dealer.
Check that the unit is operating
within its operating range (refer
to "Technical specifications" on
page 44).
Contact your local dealer.
Check that the unit is operating
within its operating range (refer
to "Technical specifications" on
page 44).
Contact your local dealer.
Check that the unit is operating
within its operating range (refer
to "Technical specifications" on
page 44).
Contact your local dealer.
Check if the fan is not obstructed
by dirt. If the fan is not
obstructed, contact your local
dealer.
Contact your local dealer.
• Check that the contactor of the
electric booster heater is not
short circuited.
• Check that the domestic hot
water thermistor is giving the
correct read out.
Clean the outdoor coil. If the coil
is clean, contact your local
dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Installation manual
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