Rectification Of Faults - Siemens PolyCool CPS 40 Manuel D'installation Et D'utilisation

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
controller)
Pressure
sensor
Electronic injection
valve (EIV)
Controller
For any faults about the enabling signal D1, the compressor
Building Technologies
HVAC Products
7

Rectification of faults

When any fault signal is detected, the alarm
and 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
CPS40
Possible cause / remedy
Sensor cable with an open-circuit / not
connected, or a short-circuit
Measured value ≤ TL
Measured value ≥ 80 °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 ≥ 10.5 V or 20.5 mA
(in external capacity control)
Measured value ≥ 10 V or 20 mA
(in internal capacity control with active
temperature sensor)
Measured value ≤ 4 mA
Measured value ≥ 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
degree 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 ⇒
Controller faulty
External noise voltage on the signal line
to the EIV
icon will flash simultaneously.
CE1U3372XX / H 74 319 0555 0 a
icon will flash
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22.09.2006