Troubleshooting
NOTE
Work behind covers secured by screws may only
be carried out by, or under the supervision of,
a qualified installation engineer.
NOTE
As AG-AC10 can be connected to several differ-
ent indoor units, these should also be checked.
NOTE
In the event of action to rectify malfunctions
that require work within screwed hatches, the
incoming supply electricity must isolated at the
safety switch.
Basic actions
Start by checking the following possible fault sources:
■
That the climate unit is running or that the supply cable
to AG-AC10 is connected.
■
Group and main fuses of the accommodation.
■
The property's earth circuit breaker.
Fault codes
Caution
Remove the panel that protects the terminal
blocks to read off the LEDs. See page 14.
Key to symbols
The LED is off.
The LED flashes.
CauseDL1DL2DL3DL4DL5
Electricity in test mode.
Mixed up pipes.
Compressor sensor broken or disconnected.
Defective or disconnected temp. sensor liquid pipe circuit C.
Defective or disconnected temp. sensor gas pipe circuit C.
Defective or disconnected temp. sensor liquid pipe circuit B.
Defective or disconnected temp. sensor gas pipe circuit B.
Defective or disconnected temp. sensor liquid pipe circuit A.
Defective or not connected temp. sensor gas pipe circuit A.
Compressor sensor defective or not connected.
Outdoor temperature sensor defective or not connected.
Evaporator sensor defective or not connected.
Overcurrent compressor.
The compressor's control electronics have overheated.
Overcurrent on fan.
The fan's control electronics have overheated.
Phase monitor tripped.
Fault in indoor unit.
Communication fault with indoor unit.
DL3 is lit with a steady light if all indoors units are functioning correctly, but are switched off. DL3 and DL4 are lit
with a steady light if at least one indoor unit is running..
AG-AC10Chapter 7 | Disturbances in comfort24
7 Disturbances in comfort
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