24
7425MUM651
Model: QBS
- Use and Maintenance Manual
Rev. 02
10
T
ROUBLESHOOTING
Cause
Alarm or symptom
Solution
Execution
1. The unit does not start
Contacts of the main differential
switch are open
Electronic controller
off
Close the contacts
User
Unit's electrical panel cut-off switch
is open
Electronic controller
off
Close the contacts
User
Compressor timer active
The compressor icon
on the display of the
electronic controller is
flashing
Wait (5 mins at the most)
User
No consent from the service
thermostat
System water at
temperature (see
display)
Apply a thermal load to the
machine or lower the set
point
User
No consent from the antifreeze
thermostat
AL
Reset a temperature of the
water (setpoint) compatible
with the calibration of the
antifreeze thermostat
User
Service and anti-freeze probe
defective
AL
Check contacts and
replace, if necessary
Specialized
personnel
Water temperature probes defective
Pr1/Pr2
Check contacts and
replace, if necessary
Specialized
personnel
Intervention of the main differential
switch
Electronic controller
off
Look for current leakage
inside the machine
Specialized
personnel
2. The compressor does not start
Intervention of the thermal
protection inside the compressor
The contactor of the
compressor is on but
the compressor is
stopped
Wait for cooling: check that
the compressor is working
under normal conditions.
Check for insufficient
refrigerant in the circuit (see
point 6).
Specialized
personnel
Contactor of the compressor off
The compressor icon
is on but the
compressor is stopped
Check the voltage at the
coil of the contactos of the
compressor and the
continuity of the coil itself
Specialized
personnel
3. The water pump does not make pressure and flow
The suction pipe of the pump is full
of air or the pressure drops on the
hydraulic circuit are too high
The water pump does
not work properly
Make sure that the tube that
draws the inlet water to the
pump is almost always fluid-
filled. It is also recommend,
at least in the very early re-
start phase, to close the
liquid outlet port of the
chiller to increase the
pump's prevalence (see
paragraph
3.4.3 Charging
the water circuit
)
Specialized
personnel
Содержание PURESTREAM MINI-CUBE QBS 001 EAA Option
Страница 1: ...QBS Air Cooled Water Chiller User Manual MINI CUBE BY FRIULAIR PURESTREAM ...
Страница 32: ...27 7425MUM651 Model QBS Use and Maintenance Manual Rev 02 12 WATER DIAGRAMS QBS 001 002 ...
Страница 33: ...28 7425MUM651 Model QBS Use and Maintenance Manual Rev 02 13 REFRIGERANT DIAGRAMS QBS 001 002 14 ...
