Carrier 69NT40-561-201 - Figure 3−12 Alarm Troubleshooting Sequence

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3−25

T-364

Start

Troubleshooting

Unit

configured

correctly?

Pass

Pre-trip

inspection?

Active

Alarms?

Correct

software

version?

Did

Evaporator

fans start?

Operating

pressures

normal?

Check Power

Supply

Install Latest

Software

Revision

Load correct

unit

configuration

See alarm

details &

repair

Correct

all faults

Yes

Correct

Refrigerant

issue

Unit OK

Yes

Refer to CONNECT POWER

Section 4.2

Refer to CONNECT POWER

Section 4.2

Refer to CONTROLLER SOFTWARE

Section 3.2

Refer to Configuration Software (Variables)

Section 3.2.1

Refer to Controller Alarm Indications

Table 3−6

Refer to Pre-trip Diagnostics

Section 3.6

Refer to REFRIGERATION SYSTEM

SERVICE Section 6.3

Check Power

Supply

Unit does

self test?

Figure 3−12 Alarm Troubleshooting Sequence

Main Page

Table of Contents9
Figure 2−1 Refrigeration Unit − Front Section18
Figure 2−2 Evaporator Section19
Figure 2−3 Compressor Section20
Figure 2−4 Air−Cooled Condenser Section21
Figure 2−5 Control Box Section22
Table 2−1 Safety and Protective Devices25
Figure 2−6 Refrigeration Circuit Schematic − Standard Operation27
Figure 2−7 Refrigeration Circuit Schematic − Economized Operation28
Figure 3−1 Temperature Control System30
Table 3−1 Keypad Function31
Figure 3−2 Keypad31
Figure 3−3 Display Module32
Figure 3−4 Control Module32
Figure 3−5 Controller Operation - Perishable Mode34
Figure 3−6 Perishable Mode Cooling35
Figure 3−7 Perishable Mode Heating36
Figure 3−8 Controller Operation - Frozen Mode37
Figure 3−9 Frozen Mode38
Figure 3−10 Defrost38
Table 3−2 Datacorder Configuration Variables42
Figure 3−11 Standard Configuration Download Report43
Table 3−3 Datacorder Standard Configurations44
Table 3−4 Controller Configuration Variables47
Table 3−5 Controller Function Codes48
Figure 3−12 Alarm Troubleshooting Sequence54
Table 3−6 Controller Alarm Indications55
Table 3−7 Controller Pre-Trip Test Codes63
Table 3−8 Datacorder Function Code Assignments69
Table 3−9 Datacorder Pre-Trip Result Records70
Table 3−10 Datacorder Alarm Indications71
Figure 4−1 Upper Fresh Air Make up Flow Chart73
Figure 6−1 Manifold Gauge Set82
Figure 6−2 R-134A Manifold Gauge/Hose Set82
Figure 6−3 Service Valve83
Figure 6−4 Refrigeration System Service Connections84
Figure 6−5 Compressor Kit86
Figure 6−6 High Pressure Switch Testing87
Figure 6−7 Heater Arrangement90
Figure 6−8 Evaporator Fan Assembly91
Figure 6−9 Electronic Expansion Valve92
Figure 6−10 Coil View of Economizer Solenoid Valve (ESV)93
Figure 6−11 Economizer Expansion Valve93
Figure 6−12 View of Digital Unloader Valve (DUV) Assembly94
Table 6−1 Valve Override Control Displays95
Figure 6−13 Controller Section of the Control Box96
Table 6−2 Sensor Resistance99
Table 6−3 Sensor Resistance (CPDS)100
Figure 6−14 Sensor Types101
Figure 6−15 Sensor and Cable Splice101
Figure 6−16 Supply Sensor Positioning102
Figure 6−17 Return Sensor Positioning102
Figure 6−18 Evaporator Temperature Sensor Positioning102
Figure 6−19 Compressor Discharge Temperature Sensor103
Figure 6−20 Communications Interface Installation104
Table 6−4 R-134A Temperature - Pressure Chart105
Table 6−5 Recommended Bolt Torque Values106
Figure 7−1 LEGEND − Standard Unit Configuration107
Figure 7−2 SCHEMATIC DIAGRAM108
Figure 7−3 UNIT WIRING DIAGRAM109

Carrier 69NT40-561-201 - Figure 3−12 Alarm Troubleshooting Sequence

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