Kriwan Protector Functional Check And Failure Detection; Checking The Connection; Checking The Compressor Thermistor Chain; Checking The Protection Module - Emerson COPELAND ZH04K1P Application Manuallines

Supply voltage: Dual voltage
Supply voltage
Ambient temperature range
R , total
25
Trip resistance
Reset time delay type 1 / type 2
Reset of running time
Short circuit monitoring system
Protection class according to EN 60529
Weight
Mounting
Housing material
Table 5: Protection module specifications INT69SU2
4.5

Kriwan protector functional check and failure detection

WARNING
Conductor cables! Electrical shock hazard! Shut off power supply bef ore
and between each test.
Prior to start-up of the fully connected compressor a f unctional check shall be carried out:
▪ Disconnect one terminal either S1 or S2 of the protection module. If t he c ompres sor is now
switched on, the motor should not start (simulation of an open thermistor chain).
▪ Reconnect the disconnected thermistor line. If the compressor is now switched o n, t he motor
must start.
If the motor does not start up during the functional check, this indicates a disturbance in operation.
The f ollowing steps should be followed:

4.5.1 Checking the connection

▪ Check the connection of the thermistor leads in the terminal box and at the protect ion module
f or possible loose connections or cable breakage.
If there is neither loose connection nor cable breakage the resistance of the thermistor chain must
be checked.

4.5.2 Checking the compressor thermistor chain

Caution: Use maximum measuring voltage of 3V!
The thermistor leads at terminals S1 and S2 of the module shall be disconnected and the
resistance measured between the leads. The resistance must be between 150 Ω and 1250 Ω.
▪ If the thermistor chain has a higher resistance (2750 Ω or higher), the motor temperature is s till
too high and it must be allowed to cool. Then measure again.
▪ If the resistance is below 30 Ω, the compressor has to be exchanged due t o s horted s ensor
circuit.
▪ An inf inite value indicates an open sensor circuit and the compressor has to b e replaced.
If no defect is detected in the thermistor chain the module must be checked.

4.5.3 Checking the protection module

The control connections at M1 and M2 have to be removed and the switching conditions must be
checked by an ohmmeter or signal buzzer:
▪ Simulation of a short circuit in the thermistor chain (0 Ω): Bridge the already disconnected
thermistor terminals S1 and S2 and switch on the voltage supply; the relay must switch on then
of f again after a short period; connection established then interrupted between t erminals M1
and M2.
22
115-230 V AC 50 Hz, -15 %...+10 %, 3 VA
120-240 V AC 60 Hz, -15 %...+10 %, 3 VA
24 V AC 50/60 Hz, -15 %...+10 %, 3 VA
24 V DC  20 %, 2 W
-30...+70 °C
< 1,8k 
4.50k Ω ± 20 %
30 min  5 min / 60 min  5 min
Power interruption / mains failure for approx.
5 sec
Typically < 30 Ω
IP00
Approximately 200 g
Screw in or snap in
PA66 GF25 FR
AGL_HP_ST_ZHK1P_EN_Rev00