Technical data

Electrical System Control Centre Initiated Shutdowns - Manual Reset Restart
Displayed Reason for
Shutdown
Control Function Possible Cause Recommended Action
MTR PHASE CURRENT
UNBALANCE(SSS only)
Current in one phase differs
from average by more than
30%
Loss of supply to one
phase
Check mains supply
Check power connections
Motor fault Check fuses
Check motor windings
MOTOR CONTROLLER -
EXT RESET
Solid state starter or remote
starter current module
contacts open
Fault in motor starter Check starter operation
POWER FAILURE
Microprocessor board
detects loss of supply
Power supply failure Check mains supply
REMOTE STOP
Remote stop contacts
closed
Wiring fault Check correct operation of
remote stop contacts
REPLACE RTC, U16 -
REPROGRAM
SETPOINTS
Real Time Clock chip
internal battery fault
detected
Old or faulty chip U16 Replace RTC IC Chip and
reprogram unit.
STARTER MALFUNCTION
DETECTED
Motor current measured as
more than 15% FLA for
more than 10 seconds with
no compressor start signal
Defective motor starter Check starter operation
Defective CTs Check CT operation and
wiring
System Faults Warnings Displayed During Normal Running
Displayed Reason for
Shutdown
Control Function Possible Cause Recommended Action
HIGH OIL TEMPERATURE
Oil temp. Between 73.9 and
76.7 deg C
Blocked oil filter or
restricted oil cooler line
Check for correct oil flow
and cooler operation
DIRTY OIL FILTER
Oil filter pressure
differential is between
138kPa and 176kPa for
more than 5 seconds
Oil line blockage Check for blocked oil filter
Check oil line service
valves are open
COND TRANSDUCER
ERROR
Condenser pressure
measured as more than
2138 kPa
Defective discharge
pressure transducer or
wiring
Check sensor operation
and wiring
EXCESS REFRIGERANT
CHARGE
Discharge superheat is in
less than 2.8 °C after 3
minutes run time
Excess refrigerant in
system
Trim refrigerant charge
035L02381-GB0 8-5