York YLAA0115 - FIGURE 41 - Microboard Layout

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JOHNSON CONTROLS

164

FORM 150.72-ICOM6

ISSUE DATE: 12/29/2017

SECTION 9 – SERVICE AND TROUBLESHOOTING

FIGURE 41 - MICROBOARD LAYOUT

TB5

TB1

TB6

TB7

TB8

TB9

TB10

J14

J13

J12

J15

J11

J10

J9

J8

J7

J6

J5

J3

I/O BOARD

IPU

BOARD

JP1

LD12721

Table of Contents

Default Chapter5
- Table of Contents5
Section 1 - General Chiller Information and Safety11
- Introduction11
- Warranty11
- Handling11
- Safety and Quality11
- About this Manual12
- Misuse of Equipment12
Section 2 - Product Description15
- General System Description15
- Introduction15
- TABLE 1 - Canadian Registration Numbers16
- Building Automation System Interface17
- Communications17
- Power Panel17
- Accessories and Options18
FIGURE 1 - Unit Components (Front)20
FIGURE 2 - Unit Components (Side)21
FIGURE 3 - Power Panel Components22
FIGURE 4 - Power Panel / Control Components23
TABLE 2 - Complete Pin Number Description24
FIGURE 5 - Process and Instrumentation Diagram29
Section 3 - Handling and Storage31
- Delivery and Storage31
- Inspection31
- Moving the Chiller31
- FIGURE 6 - Unit Rigging/Lifting32
- Lifting Using Lugs33
- Lifting Using Shackles33
- Lifting Weights34
FIGURE 7 - Warning34
Section 4 - Installation35
- Installation Checklist35
- Location and Clearances35
- Startup/Commissioning35
- Chilled Liquid Piping36
- Compressor Mounting36
- Remote Cooler Option36
- Spring Isolators (Optional)36
- FIGURE 8 - Chilled Liquid System37
- Pipework Arrangement37
- Wiring37
- High Pressure Cutout38
- Relief Valves38
- Single-Point Supply Connection - Terminal Block, Non-Fused Disconnect Switch or Circuit Breaker39
FIGURE 9 - Single-Point Supply Connection - Terminal Block, Non-Fused Disconnect Switch or39
FIGURE 10 - Control Wiring Inputs40
FIGURE 11 - Thermal Dispersion Flow Switch41
FIGURE 12 - Thermal Dispersion Flow Switch (Combine Together)41
FIGURE 13 - Control Wiring Outputs42
TABLE 3 - Temperatures and Flows43
Section 5 - Technical Data43
- TABLE 4 - Ethylene and Propylene Glycol Correction Factors45
- Physical Data YLAA0058 - YLAA0230 60Hz46
- TABLE 7 - Voltage Range48
- TABLE 6 - Micropanel Power Supply48
- TABLE 9 - Transformer Load49
- TABLE 8 - Pump Electrical Data (60 Hz)49
- TABLE 10 - Electrical Data Without Pumps50
- TABLE 11 - Wiring Lugs54
- Electrical Notes56
  - FIGURE 14 - Elementary Wiring Diagram60
  - Clearances88
- Weight Distribution and Isolator Mounting Positions87
Section 6 - Commissioning99
- Preparation - Power off99
- Preparation - Power on101
- How to Commission the Pump VFD102
Section 7 - Unit Controls107
- Introduction107
- IPU II and I/O Boards107
- Battery Back-Up108
- Display108
- Keypad108
- Programming # Oof Compressors108
- Transformer108
- Unit Switch108
- Status Key109
- Display/Print Keys115
- Unit Keys131
TABLE 14 - Minimum, Maximum and Default Values138
FIGURE 37 - Micro Panel Connections138
TABLE 15 - Values Required for BAS Communication139
TABLE 16 - Real Time Error Numbers140
TABLE 17 - Native Bacnet, Modbus and N2 Communications Data Map141
TABLE 18 - Yorktalk 2 Communications Data Map145
Section 8 - Unit Operation149
- Capacity Control149
- Discharge Pressure Limit Controls150
- FIGURE 38 - Leaving Water Temperature Control Example150
- Leaving Chilled Liquid Control150
- Suction Pressure Limit Controls150
- Leaving Chilled Liquid Control Override to Reduce Cycling151
- Leaving Chilled Liquid System Lead/Lag and Compressor Sequencing152
- Return Chilled Liquid Control152
- Alarm Status158
- Compressor Run Status158
- Load Limiting158
Section 9 - Service and Troubleshooting161
- Clearing History Buffers161
- Service Mode161
- Service Mode - Outputs161
- Service Mode - Analog and Digital Inputs162
- Service Mode - Chiller Configuration162
- Control Inputs/Outputs163
- TABLE 26 - I/O Digital Outputs163
- TABLE 25 - I/O Digital Inputs163
- FIGURE 41 - Microboard Layout164
- Checking Inputs and Outputs165
TABLE 32 - Troubleshooting170
Section 10 - Maintenance173
- Compressors173
- Condenser Fan Motors173
- Condenser MCHX Cleaning173
- Operating Parameters174
- On-Board Battery Back-Up174
- Brazed Plate Heat Exchanger (Evaporator) Heater174
- Overall Unit Inspection174
- Temperature177
TABLE 33 - si Metric Conversion177

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