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V.ARIAN.SHANKAR
19-05-2008, 12:05 PM
Hi,


One Of My Chiller Carrier Model 30gt-190-k 910 Is Tripping On 51(diagnostic Display Codes) This Is Mostly Happening In Night Time.weekly Minimum 3 Time.

the System Gas Is Used 22 ,suction Pr 60psig Discharge Pr320,ambient Temp Day Time 43centigrade,cooling Set Point 46 F(supply Water Set Point)
condenssor Coil New, There Is No Block All condessor Fans Are Working
condenssor Head Temperature Is Also Normal.
cpcs Is Installed.(Compressor Protection Control system)

Gibbo
19-05-2008, 08:00 PM
I guess this is a Flotronic 1 Chiller. The usual safeties connected to the compressor protection boards (CPCS) in series are High Pressure, Discharge Gas Thermostat, possibly compressor overloads and cpcs relay contacts
The HP switch will be set for 425 psig and the DGT trips at 295 degrees F. Its possible the DGT is causing a nuisance trip this can be bypassed there are already enough compressor safeties for protection. This should give you an idea where to look. Any problems let me know

V.ARIAN.SHANKAR
20-05-2008, 11:32 AM
Thanks Mr Gibbo
As Per Your Advise I Am By Pass The 'dgt' But The Problem Is Still Coming After 45 Minutes Working.

Tesla
20-05-2008, 12:09 PM
Could be logging oil in the evaperator running at lo load durring nite causing oil press fault - common prob with these chillers. But I don't have the manual at hand for fault codes.

moideen
20-05-2008, 03:36 PM
hi shankar,i am also dubai.i have two suggestions.
1.check the loose connection on plug assembly(H.P,D.G.T.SERIES LINE)

2. remove the sensor wire(only for checking) of gound current protection from cpcs board.if sensor has error ,same larm will happen after minutes or houres.

V.ARIAN.SHANKAR
21-05-2008, 01:31 PM
hi, Moideen As Per Your Instruction I -removed-the Plug Clean With Crc And Tightly Refix It,removed The Sensor Wire Then Immediatly Alarm Coming .
finally I Replaced The Cpcs With Relay Now It Is Working Under Obsevation. My Hearty Thanks To Mr Gibbo,tesla And Moideen For Your Kind Co-operation.

moideen
21-05-2008, 03:55 PM
hi shankar,may i know that you disconnect which wire from cpcs board.is this T1,T2?OR S1,S2.sensor is T1,T2.I want to confirm that!pls replay.

V.ARIAN.SHANKAR
22-05-2008, 01:29 PM
Hi, Moideen I Just Removed The Cpcs ,s T1 And T2 Wires Only . But The Diagnostic Disply Codes Coming 51,52,55,56 Also Showing The Display That Is Why I Compel To Replace Cpcs . (050-7882979)