Stulz CRL 210 CW, Original Instructions Manual

Page: 58 / 86

58
/04.2016/ G35 EN
View Co08
Set the control period on 30 seconds. This means the following: If 30
seconds after the compressor start, the hot gas pressure is less than the
adjusted 0,3 bar higher than the value before the start, the compressor
will be stopped and the alarm message „Start failure alarm“ will appear.
The alarm will be automatically reset 5 times and the compressor will be
restarted 30 seconds after the stop. After the fifth failed attempt the alarm
„Compressor start failure - Check motor wiring“ is displayed and there is
no other start attempt.
In the view C014 the operation range of the compressor (Zone 1c) can be
extended.
Set the maximum admitted speed on 120 rps.
In view Co15 you can adjust, how the control with a low pressure ratio
shall function.
1. by closing the expansion valve.
2. by increasing the compressor speed.
Set both parameters to "Yes".
View Co04
Set the limit value for minimum suction pressure
on 3,0 bar.
Set the delay for low pressure alarm
(Min. Suction Compr Start Delay on 180s.
View Co05
Here you adjust the admitted maximum pressure difference between hot
gas and suction gas to allow the compressor start. A higher pressure
difference would overcharge the inverter with reference to the current and
leads to an alarm message.
Set 7,0 bar.
The configuration is now finished.
• De-energize the μPC.
• Pull the telephone connector of the PGD1 from block J7.
• Re-establish the 0V connection to terminal ID7.
• Put the connector of the ModBus® connection onto J8.
• Switch on again the μPC.