Airwell DLF 18 DCI, Technical Manual

Page: 80 / 102

13-11
TROUBLESHOOTING
SM DL
F 1
-A.1 GB
13.4.4 Indoor unit diagnostics and corrective actions
No. Fault Probable Cause Corrective Action
1-4,
6
Sensor failures
Sensors not
connected or
damaged
Check Thermistor (
13.5.13
)
7
==
Family/Model IDU is not a valid
model or family
=X
8 No Communication
IDU-ODU
communication Check communication between indoor
and outdoor units (
13.5.17
)
9 No Encoder
Indoor electronics or
motor
Check motor wiring, if OK, replace motor
If still not ok
Replace Indoor electronic assembly
(
14.2.2
)
11 Outdoor Unit Fault
Outdoor controller
problem
Check for any fault code shown on
outdoor unit display board and act
accordingly (
13.4
)
17-18 Protections Indication No action
19
Outdoor Unit
Protection
Compressor stopped
due to outdoor unit
protection
Normally no action is required
If the problem persists for more than
twice on each hour, Check for any fault
code shown on outdoor unit display board
and act accordingly (
13.4
)
Check the EEV (
13.5.12
)
Check the Outdoor fans (
13.5.9
)
Check the Indoor fans (
13.5.19
)
Check the Compressor (
13.5.10
)
Check the CTT Thermistor (
13.5.13
)
20
Indoor Coil HP
Protection
Compressor stopped
due to high pressure
(heating) protection
Normally no action is required
If the problem persists for more than
twice on each hour, check for refrigerant
leak and thermodynamic operation (
13.3
)
Check the EEV (
13.5.12
)
Check the Outdoor fans (
13.5.9
)
Check the Indoor fans (
13.5.19
)
Check the Compressor
(13.5.10
)
Check the CTT Thermistor (
13.5.13
)
21 <"%Q
Compressor stopped
due to water level
"%
Check the drainage tube for any clog.
%
needed.
It is highly recommended to install a
siphon into the unit drainage point.