Disposal; Overview: Disposal; To Pump Down - Daikin INTERGAS Altherma NHY2KOMB28AA Installer's Reference Manual

Error Cause Possible solution
code
4 No flame signal ▪ Gas tap is closed
▪ No or incorrect ignition gap
▪ Gas supply pressure is too low or
▪ Gas valve or ignition unit is NOT
5 Poor flame signal ▪ Condensate drain blocked
▪ Check adjustment of gas valve
6 Flame detection ▪ Replace ignition cable and spark
fault
▪ Replace ignition unit
▪ Replace boiler controller
8 Incorrect fan speed ▪ Fan catching on casing
▪ Wiring between fan and casing
▪ Check wiring for poor wire contact
▪ Replace fan
29, 30 Gas valve relay Replace boiler controller
fault
16

Disposal

NOTICE
Do NOT try to dismantle the system yourself: dismantling
of the system, treatment of the refrigerant, oil and other
parts MUST comply with applicable legislation. Units
MUST be treated at a specialised treatment facility for
reuse, recycling and recovery.
16.1

Overview: Disposal

Typical workflow
Disposing of the system typically consists of the following stages:
1 Pumping down the system.
2 Bringing the system to a specialized treatment facility.
INFORMATION
For more details, see the service manual.
16.2

To pump down

Example: To protect the environment, pump down when disposing
of the unit.
It is NOT required to pump down when relocating the unit.
DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage. If you want to pump
down the system, and there is a leak in the refrigerant
circuit:
▪ Do NOT use the unit's automatic pump down function,
with which you can collect all refrigerant from the
system into the outdoor unit. Possible consequence:
Self-combustion and explosion of the compressor
because of air going into the operating compressor.
▪ Use a separate recovery system so that the unit's
compressor does NOT have to operate.
EJHA04AAV3 + NHY2KOMB28+32AA
Daikin Altherma H Hybrid
4P556861-1A – 2019.05
fails
powered
plug cap
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 breakdown or
damage to the system can result due to abnormal pressure
in the refrigerant cycle.
Pump down operation will extract all refrigerant from the system into
the outdoor unit (compressor module).
1 Remove the valve cap from the liquid stop valve and the gas
stop valve.
2 On the user interface, start the pump down operation. Go to
> Installer settings > System operation >
[A.6.E.1]:
Pump down > Start pump down.
3 After ±2 minutes, close the liquid stop valve with a hexagonal
wrench.
4 Check on the manifold if the vacuum is reached.
5 After ±5 minutes, close the gas stop valve, and stop the pump
down operation by pressing
b
c
a
d
e
d
a Liquid stop valve
b Closing direction
c Hexagonal wrench
d Valve cap
e Gas stop valve
16 Disposal
on the user interface.
Installer reference guide
93