Danfoss IPS 8, User Manual

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25 | BC344024774466en-000201 © Danfoss | DCS (ms) |
2021.03
Table 03
Procedure to isolate IPS for servicing
Multipoint Single point purging from receiver
1
Close all supply lines from the purge points of the ammonia
system.
Do not close any stop valve between IPS 8 and float valve
Restart the controller to force pump-down
2 Restart the controller to force pump-down Wait 20 minutes
3 Wait 20 minutes
4
Stop the compressor by turning the compressor switch QM1 to
the off position Stop the compressor by turning the compressor switch QM1 to
the off position
5
Close the SVA shut-off valve in the drain line (located under
the IPS 8) Close the SVA shut-off valve in the drain line (located under
the IPS 8)
6
Release the remaining system pressure to atmosphere
by opening the SNV drain valve. This can also be done by
attaching a permanent magnet on the AKVA 10 valve for forced
opening Release the remaining system pressure to atmosphere
by opening the SNV drain valve. This can also be done by
attaching a permanent magnet on the AKVA 10 valve for forced
opening
Disposal of the IPS 8
If an IPS 8 unit is worn out and has to be replaced,
the disposal must be done in accordance with
national legislation and only done by competent
personnel.
Table 04
ALARMS Description Troubleshooting
A01 General alarm Missing feedback on DI3. Leads to shut down of IPS 8 No feedback from the relays; Compressor, air fan or condenser fan
E10 System is OFF Indicates status o the main switch -
E14 Liquid alarm Signal from the LLS that there is liquid in the evaporator LLS 4000 feedback
E13 Compressor EROR Indicates no status is being received from KL01
We are missing status feedback of compressor from KL1 relay, for
example we have PHS switch so if pressure is high (24 bar's).
E01
Temp Sensor Fault Indicates no signal from temperature sensor Cable is cut, or sensor is missing. Check connection.
E16 Discharge sensor error Indicates no signal from temperature sensor Cable is cut, or sensor is missing. Check connection.
E17 Suction sensor error Indicates no signal from temperature sensor Cable is cut, or sensor is missing. Check connection.
E02 BPL Sensor Fault Indicates no signal from pressure sensor (R452a) Cable is cut, or sensor is missing. Check connection.
E03 BPH Sensor Fault Indicates no signal from pressure sensor (R717) Cable is cut, or sensor is missing. Check connection.
E04 Low temperature Indicates too low ambient temperature (<-50°C) Readings are out from working limits of sensor
E05 Hi temperature Indicates too high ambient temperature (>120°C) Discharge line is too hot, check that condensing fun is working.
E06 Low pressure BPL Indicates too low R452a pressure
Factory setting 0.3 bar, we can have several problems: a) Restrictor
is blocked (clean it). b) Wrong piping and as addition ammonia is
draining, so check piping's. c) Check SV float.
E07
Hi pressure BPL Indicates too high R452a pressure
a) Expansion valve is not working
b) to high ambient temperature (24 bar's /54 C)
E08 Low pressure BPH Indicates too low R717 pressure Purge points are blocked, or flange is blocked with rubber plug.
E09 Hi pressure BPH Indicates too high R717 pressure Pressure is 24 bars.
E11 Memory is full A memory reset is required Need to restart IPS, and clean memory
E15 Memory wrong! Wrong counter values. The unit will automatically repair itself
If you change timers CST or PLT, you need to stop IPS by using M/S,
else one of timers will fail and count wrong
E12 Total purge time error
This occurs when PLT is activated. System will automatically restart
when CST has expired
If IPS is running on one point more than PLT (24 hours F.S.), IPS
will be pushed to next point, Alarm will be active for CSTM (CST /
n-points). For example if we have 8 points, then CSTM is 135 min, so
after 135-minute IPS will start compressor.