Siemens PolyCool CPS 40, Инструкция по установке и эксплуатации, Страница: 47 / 124

7 Rectification of faults
When any fault signal is detected, the alarm icon will flash
and the LCD displays ERR (or FAIL) with the corresponding
parameter.
Component Fault Possible cause / remedy
Measured value flashes
Display: FAIL Sensor cable with an open-circuit / not
connected, or a short-circuit
Measured value flashes
Display: ERR / LO
Measured value
≤
TL
Passive
temperature
sensor Ni1000
Measured value flashes
Display: ERR / HI
Measured value
≥
80
°
C
Measured value flashes
Display: ERR / LO
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)
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)
Measured value flashes
Display: ERR / HI 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 flashes
Display: ERR / LO
Measured value
≤
4 mA
Pressure
sensor
Measured value flashes
Display: ERR / HI
Measured value
≥
20 mA
No position feedback
signal = 0 V 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 does not open
Valve faulty
Position feedback signal
does not match the
manually entered degree
of opening Cable for feedback signal not connected
(for connection terminals, refer to data
sheet)
Open-circuit or valve faulty
Electronic injection
valve (EIV)
Icing of evaporator when
valve is closed Valve faulty
Electronic calibration of valve not correct
Valve does not fully close; possibility of
dirt inside the valve
No display Check power supply (AC / DC 24 V)
Manipulated variable
always 0 V (Y1) Short-circuit / sensor with open-circuit
No enabling via D1 *
Controller faulty
Controller output Y1 is not 0 V
⇒
Controller faulty
Controller
Icing of evaporator with
no enabling via D1
External noise voltage on the signal line
to the EIV
For any faults about the enabling signal D1, the compressor icon will flash simultaneously.
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Building Technologies CPS40 CE1U3372XX / H 74 319 0555 0 a
HVAC Products 22.09.2006