Air and Water cooled inverter chillers and heat pump
D-EOMZC00105-17EN
Operation Manual
56/84
EWAD TZ - EWAD TZ B -EWWD VZ
Air and Water cooled inverter chillers and
heat pump
Local HMI
Network
Auto
Automatically
clears
when
the
communication is re-established.
6.1.7
Evaporator Pump #1 Failure
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 #2 failure.
String in the alarm list:
EvapPump1Fault
String in the alarm log:
EvapPump1Fault
String in the alarm snapshot
EvapPump1Fault
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
6.1.8
Evaporator Pump #2 Failure
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:
EvapPump2Fault
String in the alarm log:
EvapPump2Fault
String in the alarm snapshot
EvapPump2Fault
Pump #2 may not be operating.
Check for problem in electrical wiring of
the pump #2.
Check that electrical breaker of pump #2
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
6.1.9
External Event
This alarm indicates that a device, whose operation is linked with this machine, is reporting a problem on the
dedicated input.
Symptom
Cause
Solution
Unit status is Run.
Bell icon is moving on
controller’s display.
String in the alarm list:
UnitExternalEvent
String in the alarm log:
UnitExternalEvent
String in the alarm snapshot
UnitExternalEvent
There is an external event that has caused
the opening, for at least 5 seconds, of the
digital input on the controller board.
Check for reasons of external event and
if it can be a potential problem for a
correct chiller operation.
Reset
Notes