113
RTAA-IOM-3
Table 18
Diagnostics and Troubleshooting Chart (Continued)
DIAG. ACTIVE
CODE DIAGNOSTIC DESCRIPTION
TYPE
MODES
CAUSE
190
Low Superheat Circuit 1
CMR
All Running Modes
a. A low superheat condition existed
for an extended period of time. If a
superheat less than or equal to 2 F is
detected for more than 2400 F
seconds, the circuit shall be shut
down. The integrated area (2400 F
seconds) shall be only below 2 F
superheat.
191
Low Superheat - Circuit 2
CMR
All Running Modes
Same as diagnostic 190.
194
Low Evap. Rfgt. Temp. - Circuit 1
CMR
Compressor Energized
a. The Saturated Evaporator Refrigerant
Temp.- Circuit 1 dropped below the
Low Refrigerant Temp. Cutout Setpoint
when the circuit was running for
30 F seconds.
b. See the low ambient ignore time on
start-up.
195
Low Evap. Rfgt. Temp.
CMR
Compressor Energized
Same as diagnostic 194, but for Ckt 2.
198
Low Oil Flow - Compressor A
CMR
Compressor Energized
a. The differential oil pressure switch
remained open for more than
20 contiguous seconds on
Compressor A.
199
Low Oil Flow - Compressor B
CMR
Compressor Energized
Same as diagnostic 198, but for Cprsr B.
19A
Low Oil Flow - Compressor C
CMR
Compressor Energized
Same as diagnostic 198, but for Cprsr C.
19b
Low Oil Flow - Compressor D
CMR
Compressor Energized
Same as diagnostic 198, but for Cprsr D.
19C
Phase Loss Compressor A
CMR
Compressor Energized
a. No current was sensed on one or more
of the current transformer inputs. (Must
hold = 20% RLA. Must trip = 5% RLA.)
Time to trip shall be I second minimum
and 3 seconds maximum.
19d
Phase Loss Compressor B
CMR
Same as 19C
Same as diagnostics 19C
19E
Phase Loss Compressor C
CMR
Same as 19C
Same as diagnostics 19C
19F
Phase Loss Compressor D
CMR
Same as 19C
Same as diagnostics 19C
1A0
Power Loss Compressor A
CAR
All Running Modes
a. The compressor was running and all
three phases of current were lost.
b. There was an open Transition input
after transition had been previously
proven to have been complete.
c. There was an incomplete Transition on
the first check after transition and all
three phases of current here not
present.
1A1
Power Loss - Compressor B
CAR
Same as 1A0
Same as diagnostic 1A0.
1A2
Power Loss - Compressor C
CAR
Same as 1A0
Same as diagnostic 1A0.
1A3
Power Loss - Compressor D
CAR
Same as 1A0
Same as diagnostic 1A0.
Summary of Contents for RTAA-130
Page 2: ... American Standard Inc 1991 ...
Page 8: ...8 RTAA IOM 3 ...
Page 24: ...24 RTAA IOM 3 ...
Page 50: ...50 RTAA IOM 3 Figure 30 Refrigerant Circuit Identification ...
Page 52: ...52 RTAA IOM 3 Figure 31 Remote Evaporator Piping Example ...
Page 59: ...59 RTAA IOM 3 Continued from Previous Page See Notes on Next Page ...
Page 63: ...63 RTAA IOM 3 Continued from Previous Page See Notes on Page 61 ...
Page 65: ...65 RTAA IOM 3 Continued from Previous Page See Notes on Page 61 ...
Page 76: ...76 RTAA IOM 3 ...
Page 92: ...92 RTAA IOM 3 Figure 51 Operator Interface Controls ...
Page 120: ...120 RTAA IOM 3 ...
Page 127: ...127 RTAA IOM 3 Continued from Previous Page 2307 1566C ...
Page 128: ...128 RTAA IOM 3 Figure 57 Unit Sequence of Operation RTAA 130 to 200 Tons 2306 9122A ...
Page 132: ...132 RTAA IOM 3 Figure 58 Operator s Log ...
Page 138: ...138 RTAA IOM 3 ...