Disposal; To Pump Down; To Start And Stop Forced Cooling - Daikin ERLQ004~008CAV3 Reference Manual

13 Disposal

Error code Detailed error
code
U5 00
U4 00
AC 00
EC 00
HC 00
CJ 02
H1 00
AA 02
HJ 08
HJ 09
HJ 10
89 02
A1 00
AH 00
89 03
Installer reference guide
74
Description
User interface
communication problem.
Indoor/outdoor unit
communication problem.
Booster heater overheated.
Please contact your dealer.
Abnormal increase tank
temperature.
Tank temperature sensor
problem.
Please contact your dealer.
Room temperature sensor
problem.
Please contact your dealer.
External temperature
sensor problem.
Please contact your dealer.
External backup heater
overheated.
Please contact your dealer.
Water circuit pressure
is too high.
Water circuit pressure is
too low.
Water pressure sensor problem.
Please contact your dealer.
Heat exchanger frozen.
EEPROM reading error.
Tank disinfection function not
completed correctly.
Heat exchanger frozen.
INFORMATION
In case of error code AH and no interruption of the
disinfection function occurred due to domestic hot water
tapping, following actions are recommended:
▪ When the Domestic hot water > Setpoint mode >
Reheat or Reheat + sched. is selected, it is
recommended to program the start-up the disinfection
function at least 4 hours later than the last expected
large hot water tapping. This start-up can be set by
installer settings (disinfection function).
▪ When the Domestic hot water > Setpoint mode >
Scheduled only is selected, it is recommended to
program a Storage eco 3 hours before the scheduled
start-up of the disinfection function to preheat the tank.
13 Disposal
13.1

To pump down

In order to protect the environment, be sure to pump down in
following cases:
▪ when relocating or disposing of the unit,
▪ after maintenance or service to the refrigerant side of the system.
NOTICE
During pump down operation, stop the compressor before
removing the refrigerant piping. If the compressor is still
running and the stop valve is open during pump down, air
will be sucked into the system. Compressor breakage and
other injury will be the result due to abnormal pressure in
the refrigerant cycle.
Pump down operation will extract all refrigerant from the system into
the outdoor unit.
1 Remove the valve lid from liquid stop valve and gas stop valve.
2 Carry out the forced cooling operation.
3 After 5 to 10 minutes (after only 1 or 2 minutes in case of very
low ambient temperatures (<−10°C)), close the liquid stop valve
with a hexagonal wrench.
4 Check with the manifold if the vacuum is reached.
5 After 2-3 minutes, close the gas stop valve and stop forced
cooling operation.
b
c
a
d
e
d
a Gas stop valve
b Closing direction
c Hexagonal wrench
d Valve lid
e Liquid stop valve
13.2

To start and stop forced cooling

Confirm that dipswitch SW2 is in COOL mode.
1 Press the forced cooling operation switch SW1 to begin forced
cooling.
2 Press the forced cooling operation switch SW1 to stop forced
cooling.
ERLQ004~008CAV3 + EHVH/X04+08S18CA + EHVH/X08S26CA
Daikin Altherma - Low Temperature Split
4P313775-1C – 2012.11