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EKCBX/H008BBV3
Unit for air to water heat pump system
4PW66983-1C – 08.2011
Installation manual
43
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.
A list of all errors and corrective actions can be found in the table
below.
Instruction to turn the unit OFF
User interface mode
(heating/cooling
=
)
Domestic water
heating mode (
w
)
Push the
y
button
Push the
v
button
ON
ON
1 time
1 time
ON
OFF
1 time
—
OFF
ON
—
1 time
OFF
OFF
—
—
Error
code
Failure cause
Corrective action
80
Inlet water temperature
thermistor failure (inlet water
thermistor broken)
Contact your local dealer.
81
Outlet water temperature
thermistor failure (outlet water
temperature sensor broken)
Contact your local dealer.
89
Water heat exchanger freeze-up
failure (due to water flow too low)
Refer to error code
7H
.
Water heat exchanger freeze-up
failure (due to refrigerant
shortage)
Contact your local dealer.
7H
Flow failure (water flow too low
or no water flow at all, minimum
required water flow is 12 l/min)
• 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
).
• 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).
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 dealer.
A5
Too low (during cooling
operation) or too high (during
heating operation) refrigerant
temperature (measured by
R13T)
Contact your local dealer.
AA
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 dealer.
AC
Booster heater thermal protector
is open (applies only to
installations with a domestic hot
water tank)
Reset the thermal protector
Secondary thermal protector is
open (applies only to units with a
EKHWSU domestic hot water
tank installed)
Reset the thermal protector
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 dealer.
E1
Outdoor unit PCB defective
Contact your local dealer.
E3
Abnormal high pressure
Check that the unit is operating
within its operating range (refer
to
).
Contact your local dealer.
E4
Actuation of low pressure sensor
Check that the unit is operating
within its operating range (refer
to
).
Contact your local dealer.
E5
Overload activation of
compressor
Check that the unit is operating
within its operating range (refer
to
).
Contact your local 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
dealer.
E9
Malfunction of electronic
expansion valve
Contact your local dealer.
EC
Domestic hot water temperature
too high (>89°C)
• 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.
F3
Too high discharge temperature
(e.g. due to outdoor coil
blockage)
Clean the outdoor coil. If the coil
is clean, contact your local
dealer.
H3
Malfunctioning HPS system
Contact your local dealer.
H9
Outdoor temperature thermistor
failure (outdoor thermistor is
broken)
Contact your local dealer.
HC
Domestic hot water tank
thermistor failure
Contact your local dealer.
J1
Malfunction of pressure sensor
Contact your local dealer.
J3
Discharge pipe thermistor failure
Contact your local dealer.
J5
Suction pipe outdoor unit
thermistor failure
Contact your local dealer.
J6
Aircoil thermistor frost detection
failure
Contact your local dealer.
J7
Aircoil thermistor mean
temperature failure
Contact your local dealer.
J8
Liquid pipe outdoor unit
thermistor failure
Contact your local dealer.
L4
Electric component failure
Contact your local dealer.
L5
Electric component failure
Contact your local dealer.
L8
Electric component failure
Contact your local dealer.
L9
Electric component failure
Contact your local dealer.
LC
Electric component failure
Contact your local dealer.
P1
PCB failure
Contact your local dealer.
Error
code
Failure cause
Corrective action
