Electra WNG 25 DCI INV Service Manual page 43

TROUBLESHOOTING
No SYMPTOM
8 Compressor is on but
outdoor fan does not
work
9 Unit works in wrong
mode )cool instead of
heat or heat instead of
cool(
10 All components are
operating properly but
no cooling or no heating
11 Compressor is over
heated and unit does not
generate capacity
12 Units goes into
protections and
compressor is stopped
with no clear reason
13 Compressor motor is
generating noise and no
suction occurs
14 Water leakage from
indoor unit
15 Freezing of outdoor unit
in heat mode and
outdoor unit base is
blocked with ice
16 Unit operates with wrong
fan speeds or wrong
frequency
12.2 Checking the refrigeration system
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.
12-2
PROBABLE
CAUSE
Problem with Check outdoor fan motor according
outdoor electronics to the procedure in section 12.5.3
or outdoor fan below, if not OK replace controller
Electronics or Check RV power connections, if OK,
power connection Check RV operation with direct
to RV 230VAC power supply, if OK,
Replace outdoor controller.
Refrigerant leak Check refrigeration system.
EEV problem Check EEV
Control problem or Perform diagnostics )See 12.3
refrigeration below(, and follow the actions
system problem described.
Phase order to Check compressor phase order.
compressor is
wrong
Indoor unit Check and open drainage tube.
drainage tube is
blocked
Connect base heater.
Wrong umper j
Perform diagnostics (See 12.3
settings below), and check if units is
operating by EEPROM parameters.
Revision 0
CONTENT
CORRECTIVE ACTION
Service Manual – WNG DCI