Electra WNG 50 DCI Service Manual page 82

TROUBLESHOOTING
No SYMPTOM
Unit works in wrong
mode (cool instead of
9
heat or heat instead of
cool)
All components are
10 operating properly but no
cooling or no heating
Compressor is over
11
heated and unit does not
generate capacity
Units goes into
protections and
12
compressor is stopped
with no clear reason
Compressor motor is
13
generating noise and no
suction occurs
Water leakage from
14
indoor unit
Freezing of outdoor unit
in heat mode and
15
outdoor unit base is
blocked with ice
Unit operates with wrong
16 fan speeds or wrong
frequency
Checking the refrigeration system
13.2
Checking system pressures and other thermodynamic measures should be
done when system is in Test Mode (in Test mode, system operates in fixed
settings). The performance curves given in this manual are given for unit
performance in test mode when high indoor fan speed is selected.
Entering test mode:
Set unit to Cool/16 degrees/High indoor fan speed, or Heat/30 degrees/High
indoor fan speed, and enter diagnostics.
13-2
PROBABLE CAUSE
Electronics or power
connection to RV
Refrigerant leak
EEV problem
Control problem or
refrigeration system
problem
Phase order to
compressor is wrong
Indoor unit drainage tube
is blocked
Wrong jumper settings
Revision Y05-02
CONTENT
CORRECTIVE ACTION
Check RV power connections, if OK,
Check RV operation with direct
230VAC power supply, if OK,
Replace outdoor controller.
Check refrigeration system.
Check EEV
Perform diagnostics and follow the
actions described.
Check compressor phase order.
Check and open drainage tube.
Connect base heater.
Perform diagnostics, and check if
units is operating by EEPROM
parameters.
Service Manual - WNG 50_60_80 DCI