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13-06-2013, 04:10 PM #1
Chiller Thermocold High Pressure alarm. Carel PCO1
Hi everyone.
There is a problem.
Chiller Thermocold AWA ANERSAVE II 2310 ZC SE B(R407; PCO1 Carel controller) shows an alarm
"AL013 High Pressure Circuit 2(Pressostat)".
The wiring is OK. Pressure relay: Johnson controls P100CP-1 CO 300Psi(20 Bar) CI 400(27 Bar) with automatic reset. The pressure in the system 2 is 7.5 Bar. There is a signal in PLC terminal DI14H(220V) which responsable for High pressure alarm .The high pressure relay is connected in series with fans klixon (fan thermal protection). But the controller I/O shows on display that digital input 14 are open (there is no signal in DI14H).
What is it? Dead Controller? Can I solve the problem by restart controller? How can I do it without loss of programm?
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