Air and Water cooled inverter chillers and heat pump
EWAD TZ - EWAD TZ B - EWWD VZ
Air and Water cooled inverter chillers
and heat pump
D-EOMZC00105-17EN
Operation Manual
55/84
6.1.4
Condenser Pump #1 Failure (W/C units only)
This alarm is generated if the pump is started but the flow switch is not able to close within the recirculate time.
This can be a temporary condition or may be due to a broken flowswitch, the activation of circuit breakers,
fuses or to a pump breakdown.
Symptom
Cause
Solution
Unit could be ON.
Bell icon is moving on contr
oller’s display.
Backup pump is used or stop of all circuits
in case of pump #2 failure.
String in the alarm list:
CondPump1Fault
String in the alarm log:
CondPump1Fault
String in the alarm snapshot
CondPump1Fault
Pump #1 may not be operating.
Check for problem in electrical wiring of
the pump #1.
Check that electrical breaker of pump #1
is tripped.
If fuses are used to protect the pump,
check the integrity of fuses.
Check for problem in wiring connection
between pump starter and unit controller.
Check the water pump filter and the water
circuit for obstructions.
Flow Switch doesn’t operate properly
Check flow switch connection and
calibration.
Reset
Notes
Local HMI
Network
Auto
6.1.5
Condenser Pump #2 Failure (W/C units only)
This alarm is generated if the pump is started but the flow switch is not able to close within the recirculate time.
This can be a temporary condition or may be due to a broken flowswitch, the activation of circuit breakers,
fuses or to a pump breakdown.
Symptom
Cause
Solution
Unit could be ON.
Bell icon is moving on controller’s display.
Backup pump is used or stop of all circuits
in case of pump #1 failure.
String in the alarm list:
CondPump2Fault
String in the alarm log:
CondPump2Fault
String in the alarm snapshot
CondPump2Fault
Pump #1 may not be operating.
Check for problem in electrical wiring of
the pump #1.
Check that electrical breaker of pump #1
is tripped.
If fuses are used to protect the pump,
check the integrity of fuses.
Check for problem in wiring connection
between pump starter and unit controller.
Check the water pump filter and the water
circuit for obstructions.
Flow Switch doesn’t operate properly
Check flow switch connection and
calibration.
Reset
Notes
Local HMI
Network
Auto
6.1.6
Energy Meter Communication Fail
This alarm is generated in case of communication problems with the energy meter.
Symptom
Cause
Solution
Bell icon is moving on controller’s display.
String in the alarm list:
EnergyMtrCommFail
String in the alarm log:
EnergyMtrCommFail
String in the alarm snapshot
EnergyMtrCommFail
Module has no power supply
Refer to the datasheet of the specific
component to see if it is correctly
powered
Wrong cabling with the Unit Controller
Check if the polarity of the connections is
respected.
Modbus parameters not properly set
Referring to the datasheet of the specific
component to see if the modbus
parameters are set correctly:
Address = 20
Baud Rate =19200 kBs
Parity = None
Stop bits =1
Module is broken
Check if the display shows something
and the power supply is present.
Reset
Notes