Installation manual
16
EWAQ+EWYQ005~007ACV3P
Packaged air-cooled water chillers and
packaged reversible air to water heat pumps
4PW33165-1D
Error codes
When a safety device is activated, the digital controller 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 (by pushing
digital controller ON/OFF button 2 times). In case this procedure for
resetting the safety is not successful, contact your local Daikin dealer.
Error
code
Failure cause
Corrective action
80
Inlet water temperature
thermistor error (inlet water
thermistor broken)
Contact your local Daikin dealer.
81
Outlet water temperature
thermistor failure (outlet water
temperature sensor broken)
Contact your local Daikin dealer.
89
Water heat exchanger freeze-up
failure (due water flow too low)
Refer to error code
7H
.
Water heat exchanger freeze-up
failure (due to refrigerant
shortage)
Contact your local Daikin dealer.
7H
Flow failure (water flow too low
or no water flow at all, minimum
required water flow is 9 l/min)
• Check that all shut off valves
of the water circuit are
completely open.
• Check if the water filter needs
cleaning.
• For heat pump models: make
sure that the unit is working
within its operating range
- ambient temperature
>–15°C
- water temperature >30°C.
Also refer to
low ambient temperatures" on
page 7
.
• 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 >0.3 bar (water is
cold), >>0.3 bar (water is hot).
• Check that the pump speed
setting is on the highest
speed (III).
• 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
).
A1
A1P PCB defective
(in accessible switch box)
Contact your local Daikin dealer.
A5
Too low outlet water temperature
(outlet water temperature
measured by R1T too low)
Refer to error code
7H
.
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
A4P PCB defective
(in non-accessible switch box)
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.
E6
Compressor start-up failure
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.
E8
Overcurrent failure
Check that the unit is operating
within its operating range (refer
to
).
EA
Cooling/heating switching failure
(only for heat pump model)
Contact your local Daikin dealer.
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.
F6
Too high condensing pressure
during cooling (e.g. due to
outdoor coil blocked by dirt)
Clean the outdoor coil. If the coil
is clean, contact your local
Daikin dealer.
Too high condensing pressure
during cooling (e.g. due to unit
operating outside its operating
range)
Check that the unit is operating
within its operating range (refer
to
).
FA
High pressure failure
(due to unit operating outside its
operating range)
Check that the unit is operating
within its operating range (refer
to
).
H0
Voltage and current sensor
failure (sensor broken)
Contact your local Daikin dealer.
H9
Outdoor temperature thermistor
failure
(outdoor thermistor is broken)
Contact your local Daikin dealer.
J3
Discharge pipe thermistor failure
Contact your local Daikin dealer.
J6
Outdoor unit heat exchanger
thermistor broken or
disconnected
Contact your local Daikin dealer.
L3
Electric component failure
Contact your local Daikin dealer.
L4
Electric component failure
Contact your local Daikin dealer.
L5
Electric component failure
Contact your local Daikin dealer.
P4
Electric component failure
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 error failure
Contact your local Daikin dealer.
U7
Communication error failure
Contact your local Daikin dealer.
UA
Communication error failure
Contact your local Daikin dealer.
Error
code
Failure cause
Corrective action
