Profroid GSB Notice D'instructions page 53

7. Troubleshooting
Flash
Alarm conditions
code
Warning: Appears when
the differential
pressure is less than
0.48 – 0.62 bar for 4
seconds.
1 Lockout: Appears when
Insufficient the differential
oil pressure pressure is less than
0.48 – 0.62 bar for 2
minutes continuous or
intermittent
determined
unsafe.
Trip: Appears when the
PTC
resistance is > 4.5 kΩ.
2
Motor Lockout: Appears when
overheat 10 consecutive motor
overheat
occur.
Warning:
discharge temperature
sensor is defective or
3
disconnected.
Discharge
temp Trip/Lockout:
protection the
temperature is > 154°C
for 2 seconds.
Possible failure
reasons
Loose
oil
connections between
CoreSense
and oil sensor.
Faulty
(missing
oil
clogged
screen).
Faulty oil pump.
Clogged
but
to be screen
bearings.
Motor
mechanically seized.
Open circuit
Thermistor
harness.
Connector
engaging
connector on control
trip alarms
module
Faulty CoreSense
module.
Open
probe (faulty).
The probe connection
has not been made to
the
When the
connector.
The connector is not
plugged
CoreSense
When
board.
discharge
The
temperature
exceeded
maximum limit 154°C.
Blocked condenser.
Possible
refrigerant.
Troubleshooting measures
Verify the oil level present in the sight glass. If the oil
is not present, resolve reservoir oil supply problem or
wiring
oil level control setting issues.
Verify that the harness is fully engaged to the sensor.
module
™
Measure oil pump differential pressure. If less than
0.48 to 0.62 bar, inspect for clogged oil screen, faulty
oil sensor
oil pump, liquid floodback or worn bearings.
O-ring or
If good oil pressure exists, measure resistance across
sensor
the oil sensor while the compressor runs. If the sensor
resistance is "open" inspect for clogged sensor screen
or missing O-ring.
If sensor resistance is "closed", temporarily jumper
strainer
across the harness connector pins (do not damage the
or worn
pins!) while the compressor runs. If the oil warning does
not go away, verify harness connector engagement at
the module circuit board.
rotor is
In case of trip alarm, allow the motor to cool down for a
minimum of 2 minutes (it may take longer) and the
compressor will start automatically.
in
In case of lockout alarm or multiple trips, check PTC
resistance when the motor is cold (off for at least an
pin not
hour). If resistance is high, inspect for faulty sensor or
at
loose connection under terminal plate.
If resistance is low, inspect for loose terminal strip
connections, harness connection failure at circuit board,
™ open harness circuit or high motor temp due to return
gas temperature, motor voltage or load condition.
discharge
If there is a warning, verify proper probe connection to
the harness and proper harness connection into the
harness
circuit board.
If there is a warning, unplug the discharge temp probe
and verify if the resistance of the probe is as specified
into the
vs its approximate ambient temperature.
circuit
™
If the probe resistance is correct inspect the harness
connector receptacle for damage and apply NyoGel
Discharge 760G connector lubricant.
has
Trip or Lockout: resolve system issues (high superheat,
the
high head pressure), inspect for mechanical damage
that can lead to high temps (valve plate gasket, suction
or discharge valve failure).
loss of
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