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38
7425MUM661
Model: CWB FC
- Use and Maintenance Manual
Rev02
Cause
Alarm signal or symptom
Solution
Execution
7. The unit is working without ever stopping
Excessive thermal load.
Reduce the thermal load.
Reduce the temperature of
the incoming water and/or
the flow-capacity of the
water by closing the exit
valve of the unit a little.
User
No refrigerant.
See point 8
8. Compressor suction pipe covered with frost
No refrigerant.
High superheating, low
subcooling and high
discharge temperature of the
compressor.
Traces of oil on the
refrigerant circuit.
Check the refrigerant circuit
with a leak detector.
Repair any ruptures and
recharge the circuit.
Specialised
personnel
9. The pump doesn't start circuit breaker protection of the pump open
Excessive water flow-capacity; the
pump is absorbing too much current.
AP1
Pump 1 thermal protection alarm
AP2
Pump 2 thermal protection alarm
Reduce the flow-capacity of
the water by closing the
output valve of the pump a
little bit.
Rearm the thermomagnetic
protection of pump QP1,
QP2.
User
Short circuit or overcurrent.
AP1
Pump 1 thermal protection alarm
AP2
Pump 2 thermal protection alarm
Look for a short circuit in the
winding of the pump motor.
Check for possible over-
absorption of current due to
too low voltage; check the
power supply voltage.
Specialised
personnel
10. The unit starts and stops alternatively;
The outlet water temperature varies greatly
Low water flow
Verify the water flow.
Open the
water shut-off
valves of the plant.
If it is possible, reduce
the pressure drop of the
water circuit.
If it is possible, add a
pump with proper
available pressure.
Specialised
personnel
11. Actuator power failure
Three-way valve incorrect operation,
valve blocked totally open or totally
closed
Switch off the pump and
activate the manual override
function of the three-way
valve.
On the actuator, push and
rotate the knob for activate
the manual operation.
Do not use the actuator
disassembled from the
valve.
(see figure by side)
Specialised
personnel
Содержание PURESTREAM CWB FC
Страница 1: ...WATER CHILLER Model CWB FC Free Cooling User and Maintenance Manual BY FRIULAIR CHILLERS PURESTREAM ...
Страница 2: ...Editions Record Code Revision Edition Notes 7425MUM661 02 09 2019 Original instructions ENGLISH ...
Страница 45: ...40 7425MUM661 Model CWB FC Use and Maintenance Manual Rev02 12 WATER DIAGRAMS LEGEND CWB FC ...
Страница 46: ...41 7425MUM661 Model CWB FC Use and Maintenance Manual Rev02 13 REFRIGERANT CIRCUIT LEGEND CWB FC ...