Carel Hecu CO2, Руководство пользователя

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55
ENG
Hecu
C O
2
+0300085EN rel. 2.2 - 07.05.2019
Action Troubleshooting
Compressor shutdown, with a
reduction in speed set on Cag54 • Check positioning, installation and correct operation of P_GC probe (positioning before the check valve at the com-
pressor discharge, checking the values are read correctly)
• Check positioning, installation and correct operation of P_suct probe; 8 operating zones outside of envelope
• Check correct compressor operation (charge, sizing, presence of liquid,..)
Compressor shutdown • Check installation and correct operation of the temperature probe (wiring, electrical connections and comparison
against pressure gauge reading)
• Check compressor (enabling the liquid injection function if the discharge temperature is too high, connections to
the inverter)
• Check charge in the circuit (low charge)
Compressor shutdown • Check correct compressor operation (charge, sizing, presence of liquid,..)
• Check positioning, installation and correct operation of P_GC probe (positioning before the check valve at the com-
pressor discharge, checking the values are read correctly)
• Check positioning, installation and correct operation of P_suct probe
• Metallic noise made by compressor due to lack of lubrication by the oil
Compressor does not start • Check the inverter model installed against the model required by the compressor in the system on screen Cag02
/ • Check evaporator confi guration on screen Eab00 and then on Hecu (number of evaporators, sizing, type of controller
installed,..)
• Check Fbus connection (connections, wiring, polarity,..)
• Check MPXPRO/UC status (check confi guration on the controller, serial address parameter H0; if necessary, repeat
commissioning procedure)
/ • Check evaporator confi guration on screen Eab00 and then on Hecu (number of evaporators, sizing, type of controller
installed,..)
• Check Fbus connection (connections, wiring, polarity,..)
• Check MPXPRO/UC status (check confi guration on the controller, serial address parameter H0; if necessary, repeat
commissioning procedure)
Signal-only alarm
- No action • Check cabinet/showcase status (correct fan operation, set point)
• Check MPXPRO/UC setting (confi guration and setting of control probes)
Signal-only alarm
- No action • Check cabinet/showcase status (correct fan operation, set point)
• Check MPXPRO/UC setting (confi guration and setting of control probes)
Signal-only alarm
- No action • Check cabinet/showcase status (correct fan operation, set point)
• Check MPXPRO setting (confi guration and setting of control probes)
Signal-only alarm
- No action • Check cabinet/showcase status (correct fan operation, set point)
• Check MPXPRO setting (confi guration and setting of control probes)
Signal-only alarm
- No action • Check cabinet/showcase status (correct fan operation, set point)
• Check MPXPRO setting (confi guration and setting of control probes)
Signal-only alarm
- No action • Check t_gs and p_ev probes (type, wiring, installation position, probe limits, reading compared against mechanical
device)
• Check alarm settings
• Check E2V valve operation (correct opening/closing, check that it is not stuck open)
• Compare the SH value read by Hecu to check correct probe operation
Signal-only alarm
- No action • Check t_gs probe (type, wiring, installation position, probe limits, reading compared against mechanical device)
• Check alarm settings
• Check E2V valve operation (correct opening/closing, check that it is not stuck open)
Signal-only alarm
- No action • Check cabinet/showcase status (correct fan operation, set point)
• Check MOP settings (PM parameters on MPXPRO)
• Check compressor capacity in relation to total system cooling demand (insuffi
cient compressor capacity)
• Check useful when commissioning the system
Signal-only alarm
- No action • Check cabinet/showcase status (correct fan operation, set point)
• Check compressor capacity in relation to total system cooling demand (insuffi
cient compressor capacity)
• Check LOP settings (PL parameters on MPXPRO)
Signal-only alarm
- No action • Check parameter P1 (this must be set to 2) on MPXPRO in relation to the valve installed on the evaporator (this must
be the Carel E2V electronic valve)
Signal-only alarm
- No action Check electronic valves on the respective cabinets
Signal-only alarm
- No action Check parameter P14 on MPXPRO
Compressor shutdown • Check Fbus connection (connections, wiring, polarity,..)
• Check MPXPRO/UC status (check confi guration on the controller, serial address parameter H0; if necessary, repeat
commissioning procedure)
Signal-only alarm
- No action • Check DO setting for LT compressor on screen Fda07
• Check DO setting for parallel compressor on screen Fda08
Unit shutdown in 10 hours Check parameter P1 (this must be set to 2) on MPXPRO in relation to the valve installed on the evaporator (this must
be the Carel E2V electronic valve)
Parallel compressor shutdown • Check inverter power supply
• Check phase connection between compressor and inverter (wiring and connections)
• Check STO
• Check confi guration of inverter parameters (baud rate, parity, number of bits)
Parallel compressor shutdown • Check positioning, installation and correct operation of P_GC probe (positioning before the check valve at the com-
pressor discharge, checking the values are read correctly)
• Check positioning, installation and correct operation of P_ric probe; 8 operating zones outside of envelope
• Check correct compressor operation (charge, sizing, presence of liquid,..)
Parallel compressor shutdown with manual reset
after n restart attempts • Check compressor connections to the inverter (swapped phases, wiring and incorrect connections,..)
• Check correct compressor operation (liquid in the compressor, excessive charge in the circuit,..)
• Check positioning, installation and correct operation of P_GC probe (positioning before the check valve at the com-
pressor discharge, checking the values are read correctly)
• Check positioning, installation and correct operation of P_ric probe