Airwell DLF 18 DCI, Technical Manual

Page: 73 / 102

13-4
TROUBLESHOOTING
SM DL
F 1
-A.1 GB
No.
SYMPTOM /
PROBLEM
PROBABLE
CAUSE
CORRECTIVE ACTION
12.
Cooling capacity is not
Unit size not
match the load Check if the size chosen for the complete room(s)
load is enough or need bigger units
Piping size not
matching system
Check if piping is installed correctly and proper
diameter size and total length is according to unit
Refrigerant
leakage
Check refrigeration system
(13.3)
Refrigerant over-
charge
Refrigerant clog Check and repair clogging specially near the EEV
Electronics
control problem or
protection
Check for any fault code shown on display board
and act accordingly
Compressor
failure
Check if fault code # is shown on display board.
(13.5.10)
or
replace driver
Indoor coil block "$
Indoor fan
malfunction
Check the motor and capacitor
( 13.5.19)
Outdoor coil block Remove block and/or avoid air by-pass
Outdoor fan
malfunction
Check outdoor fan motors
(13.5.9)
EEV malfunction Check EEV
(13.5.12)
Thermistor(s)
malfunction Check if any of fault codes #1-7 is shown on display
board. Replace faulty thermistors
(13.5.13)
13.
Heating capacity is not
Check all according to above cooling problem
(12)
Reverse valve Check reversing valve operation
( 13.5.11)
Deicing not
performed
well (during
low outdoors
temperatures) Check OCT and OAT thermistors fault codes (#1
and 4)
Check OCT thermistor if connected well to pipe
Check OAT thermistor if connected well
Check the thermistors operation
(13.5.13)
14.
Compressor is over
heated
Electronic control
Check for any fault code shown on display board
and act accordingly.
EEV problem Check EEV
(13.5.12)
Refrigerant
leakage
Check refrigeration system
(13.3)
Indoor coil block "
Indoor fan
malfunction
Check indoor fan motor and capacitor
( 13.5.19)
Outdoor coil block Remove block and/or avoid air by-pass
Outdoor fan
malfunction
Check outdoor fan motors
(13.5.9)
Compressor
malfunction
Check the compressor
( 13.5.10)