Data Sheet for Product

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Siemens Superheat Controller CE1N3372en_02
Smart Infrastrucutre 2022-02-16
Fault status signals
Should faults or malfunctions on the controller, valve or sensors occur, the alarm
icon will flash and the LCD displays ERR or FAIL in place of the corresponding
parameter. The following list shows the possible causes and how the faults can be
rectified:
Component
Fault
Possible cause
Passive temperature sensor Ni1000
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
Measured value flashes
Display: ERR / HI
Measured value  80C
Active temperature sensor with DC
0…10 V / 4…20 mA or
other DC 0...10 V / 4…20 mA signal
transmitters (Synco, Saphir and
other third-party controller)
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)
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)
Pressure sensor
Measured value flashes
Display: ERR/ LO
Measured value  0 V or 4 mA (depending on the
type of pressure sensor)
Measured value flashes
Display: ERR / HI
Measured value  10 V or 20 mA (depending on the
type of pressure sensor)
Electronic injection valve (EIV)
No position feedback signal = 0 V
Connecting cable for feedback signal with an open-
circuit / not connected
Valve does not open
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
Position feedback signal does not match
the manually entered degree of opening
Cable for feedback signal not connected (for connec-
tion terminals, refer to data sheet)
Open-circuit or valve faulty
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
Controller
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 * (D2 for circuit2)
Controller faulty
Icing of evaporator with no enabling via
D1(D2 for circuit 2)
Controller output Y1 is not 0 V  Controller faulty
External noise voltage on the signal line to the EIV
* For any faults about the enabling signal D1 / D2, the compressor icon will flash simultaneously.
Disposal notes
The devices are considered electronics devices for disposal in term of European
Directive 2012/19/EU and may not be disposed of as domestic waste.
• Dispose of the device via the channels provided for this purpose
• Comply with all local and currently applicable laws and regulations.