Rectification Of Faults - Siemens PolyCool Superheat CPS40 Manual De Instalación Y Servicio

Component
Passive
temperature
sensor Ni1000
Active temperature
sensor with
DC 0..10 V / 4..20 mA
signal or other
DC 0..10 V / 4..20 mA
signal transmitters
(Synco, Saphir and
other third-party con-
troller)
Pressure
sensor
Electronic injection
valve (EIV)
Controller
For any faults about the enabling signal D1, the compressor
Siemens
Building Technologies
7

Rectification of faults

When any fault signal is detected, the alarm
the LCD displays ERR (or FAIL) with the corresponding parameter.
Fault
Measured value flashes
Display: FAIL
Measured value flashes
Display: ERR / LO
Measured value flashes
Display: ERR / HI
Measured value flashes
Display: ERR / LO
Measured value flashes
Display: ERR / HI
Measured value flashes
Display: ERR / LO
Measured value flashes
Display: ERR / HI
No position feedback
signal = 0 V
Valve does not open
Position feedback signal
does not match the
manually entered degree
of opening
Icing of evaporator when
valve is closed
No display
Manipulated variable
always 0 V (Y1)
Icing of evaporator with
no enabling via D1
Superheat - CPS40
Rectification of faults
icon will flash and
Possible cause / remedy
Sensor cable with an open-circuit / not
connected, or a short-circuit
Measured value £ TL
Measured value ³ 70 °C
Measured value £ -0.5 V or 3.5 mA
(in external capacity control)
Measured value £ 0 V or 4 mA
(in internal capacity control with active
temperature sensor)
Measured value ³ 10.5 V or 20.5 mA
(in external capacity control)
Measured value ³ 10 V or 20 mA
(in internal capacity control with active
temperature sensor)
Measured value £ 4 mA
Measured value ³ 20 mA
Connecting cable for feedback signal
with an open-circuit / not connected
Connecting cable not connected
In the simulation mode, the valve can be
checked by manually entering the de-
gree of opening and by comparing it with
the position check back signal
Valve faulty
Cable for feedback signal not connected
(for connection terminals, refer to data
sheet)
Open-circuit or valve faulty
Valve faulty
Electronic calibration of valve not correct
Valve does not fully close; possibility of
dirt inside the valve
Check power supply (AC / DC 24 V)
Short-circuit / sensor with open-circuit
No enabling via D1 *
Controller faulty
Controller output Y1 is not 0 V Þ Con-
troller faulty
External noise voltage on the signal line
to the EIV
icon will flash simultaneously.
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CE1U3372xx
2018-11-09