Carrier 255GTN Manuals

Manuals and User Guides for Carrier 255GTN. We have 1 Carrier 255GTN manual available for free PDF download: Service And Troubleshooting Manual

Carrier 255GTN Service And Troubleshooting Manual (84 pages)

Air-Cooled Reciprocating with ComfortLink Controls 50/60 Hz Controls, Start-Up, Operation, Service, and Troubleshooting

Brand: Carrier | Category: Chiller | Size: 1.47 MB

Table of Contents
1
Major System Components
3
General
3
Main Base Board (MBB)
3
Expansion Valve (EXV) Board
3
Compressor Expansion Board (CXB)
3
Scrolling Marquee Display
3
Energy Management Module (EMM)
3
Typical Control Box Overview
6
Enable/Off/Remote Contact Switch
10
Emergency On/Off Switch
10
Cooler Thermistor Locations
11
Operating Data
11
Sensors
14
- T10 - Remote Space Temperature Sensor
  14
Thermostatic Expansion Valves (TXV)
15
Compressor Protection Control System (CPCS) or Control Relay (CR)
15
Compressor Current Protection Board
15
- (CGF) and Control Relay (CR)
  15
Electronic Expansion Valve (EXV)
16
Energy Management Module
16
Capacity Control
16
- Minutes Left for Start
  26
- Minutes off Time
  26
- Loading Sequence
  26
- Lead/Lag Determination
  26
- Capacity Sequence Determination
  26
- Capacity Control Overrides
  26
Head Pressure Control
27
- COMFORTLINK™ UNITS (with EXV)
  27
- Units with Txv
  27
Pumpout
27
- Exv Units
  27
- Txv Units
  27
Marquee Display Usage
29
Service Test
29
Conﬁguring and Operating Dual Chiller
29
- Control
  29
Temperature Reset
43
Demand Limit
45
Troubleshooting
46
- Compressor Protection Control System
  46
- (CPCS) Board
  46
Compressor Ground Current (CGC) Board
46
- B-420A/B)
  46
EXV Troubleshooting
46
Alarms and Alerts
47
Alarm and Alert Codes
48
Service
52
Electronic Components
52
Compressors
52
- Compressor Removal
  52
- Oil Charge
  52
Cooler
52
- Cooler Removal
  52
- Replacing Cooler
  53
- Servicing the Cooler
  53
Condenser Coils
55
Condenser Fans
55
Refrigerant Feed Components
56
- Electronic Expansion Valve (Exv)
  56
- Moisture-Liquid Indicator
  57
- Filter Drier
  57
- Liquid Line Solenoid Valve
  57
- Liquid Line Service Valve
  57
Thermistors
57
- Location
  57
- Replacing Thermistor T2
  57
- Replacing Thermistors T1,T5,T6,T7, and T8
  58
- Thermistors T3 and T4
  58
- Thermistor/Temperature Sensor Check
  58
Safety Devices
63
- Compressor Protection
  63
- Low Oil Pressure Protection
  63
- Crankcase Heaters
  63
- Cooler Protection
  63
Relief Devices
64
- High-Side Protection
  64
- Low-Side Protection
  64
- Pressure Relief Valves
  64
Other Safeties
64
Pre-Start-Up
64
System Check
64
Start-Up and Operation
65
Actual Start-Up
65
Operating Limitations
65
- Temperatures
  65
- Voltage
  65
- Minimum Fluid Loop Volume
  65
- Flow Rate Requirements
  65
Operation Sequence
66
Appendix A - Ccn Tables
67

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Carrier 255GTN Service And Troubleshooting Manual (84 pages)

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