Electra LEX 25 DCI Service Manual page 87

TROUBLESHOOTING
13.1.4.1 Indoor Unit Diagnostics and Corrective Actions
No. Fault
Sensor failures of
1
all types
Communication
2
mismatch
3 No Communication
4 No Encoder
5 Outdoor Unit Fault
EEPROM Not
6
Updated
7 Bad EEPROM
Bad
8
Communication
Using EEPROM
9
data
The power supply
10 indicator (red led)
doesn't light up.
TThe operating
indicator (green
11
led) does not light
up
The operating
indicator (green
12 led) does not light
up when starting
from unit..
The indoor fan
13
does not function
correctly.
13-4
Probable Cause
Indoor and Outdoor
controllers are with
different versions
Communication or
grounding wiring is not
good.
Indoor electronics or motor
Outdoor controller problem
System is using ROM
parameters and not
EEPROM parameters
Communication quality is
low reliability
No problem. System is
using EEPRRRROM
parameters
There is no correct voltage
between the line and
neutral terminals on main
P.C.B.
The remote control
batteries are discharged
Check main P.C.B and
display P.C.B.
Check the voltage
between indoor fan
terminals on the main
P.C.B
CONTENTS
Corrective Action
Check sensor connections or
replace sensor
Replace Indoor controller
Check Indoor to Outdoor
wiring and grounding
Check motor wiring, if ok,
replace motor, if still not ok,
replace Indoor controller.
Switch to Outdoor
diagnostics.
No action, unless special
parameters are required for
unit operation.
No action, unless special
parameters are required for
unit operation.
Check Indoor to Outdoor
wiring and grounding
-If the voltage is low repair
power supply.
-If there is no voltage repair
general wiring.
-If there is correct voltage
replace main or display
P.C.B'S
-Replace batteries of the
remote control
-Replace P.C.B if necessary.
- If there is voltage replace
capacitor or motor.
SM LEXDCI 1-E.1 GB