Daikin EWAQ004BAVP Installer's Reference Manual page 75

Error code Detailed error
code
81 00
89 01
89 02
89 03
8H 00
A1 00
A1 01
A1 00
AA 01
C0 00
C0 01
C0 02
C4 00
CJ 02
H1 00
U3 00
U4 00
U5 00
EWAQ+EWYQ004+005BAVP
Packaged air-cooled water chillers and packaged air to water heat
pumps
4P492900-1 – 2017.06
Description
Leaving water temperature
sensor problem.
Please contact your dealer.
Heat exchanger frozen.
Heat exchanger frozen.
Heat exchanger frozen.
Abnormal increase outlet
water temperature.
Zero cross detection problem.
Power reset required.
Please contact your dealer.
EEPROM reading error.
EEPROM reading error.
Backup heater overheated.
Power reset required.
Please contact your dealer.
Flow sensor malfunction.
Manual reset.
Flow switch malfunction.
Auto reset.
Flow switch malfunction.
Manual reset.
Heat exchanger temperature
sensor problem.
Please contact your dealer.
Room temperature sensor
problem.
Please contact your dealer.
External temperature
sensor problem.
Please contact your dealer.
Under floor heating screed
dryout function not completed
correctly.
Hydro part / refrigerant part
communication problem
User interface
communication problem.
Error code Detailed error
code
U8 01
UA 00
UA 16
UA 22
NOTICE
When the minimum water flow is lower than described in
the table below, the unit will temporarily stop operation and
the user interface will display error 7H‑01. After some time,
this error will reset automatically and the unit will resume
operation.
Minimum required flow
04+05 models
If the 7H‑01 error persists, the unit will stop operation and the user
interface will display an error code that needs to be reset manually.
Depending on the problem, this error code is different:
Error code Detailed error
code
7H 05
7H 06
INFORMATION
When the user interface displays error 7H‑05, it is possible
that the pump is blocked. To check this, perform a pump
test (see "9.4.4 To perform an actuator test run" on
page 68). If it is blocked, the pump will perform a
deblocking routine during this test. During the deblocking
routine, the LED on the pump will blink red. From the
moment the pump is deblocked, the LED will stay green. If
the pump cannot be deblocked in 30 minutes, error 7H-05
will reappear on the user interface. If this is the case, the
pump needs to be checked and possibly replaced.
INFORMATION
If an error occurs during the deblocking routine, the
deblocking routine will stop and error 7H‑05 will appear on
the user interface (NOT the error that caused the
deblocking routine to stop). To make this error appear, first
accept the 7H‑05 error.
12 Troubleshooting
Description
Connection with adapter lost
Please contact your dealer.
Hydro part / refrigerant part
matching problem.
Power reset required.
Communication problem between
hydro part and control box.
Communication problem between
control box and option box.
12 l/min
Description
The water flow problems mainly
occurred during space heating
operation, or after a failed water
pump deblocking routine. Check
the space heating circuit.
The water flow problems mainly
occurred during cooling/defrost
operation. Check the space
heating/cooling circuit.
Additionally, this error code might
be an indication of frost damage
to the plate heat exchanger. In
that case, contact your local
dealer.
Installer reference guide
75