Document Outline

• Service Philosophy
• System Description
• System Level Components
  • Description
  • Chiller Module (CPM) IU1
  • Compressor Module (MCSP) 1U4 and 1U5
  • Expansion Valve Module (EXV) 1U3
  • Options Module (CSR) 1U2
  • Clear Language Display (CLD) 1U6
  • Interprocessor Communication Bridge (IPCB) 1U7
• IPC Diagnostics
• Troubleshooting Modules Using IPC Diagnostics
  • Figure 1 IPC Link Order For 70-125 Ton RTAA
  • Figure 2 Module Fuse and Power Connection, Except CLD
  • Figure 3 IPC Jumper For Bypassing Modules (to be inserted into MTA connector in place of module)
• Troubleshooting Procedure
• Temperature Sensor Checkout Procedure
• Restart Inhibit Timer
  • Figure 4 Variable Speed Fan (VSF) and Fan Staging Control
• Outdoor Air Temperature and Fan Control
• VSF Inverter Fault
• CT and MCSP Compressor Current Input Checkout Procedure
• Under-Over Voltage Transformer Checkout
• Checkout Procedure for MCSP Load/Unload Outputs
• Checkout Procedure for the Slide Valve and Load/ Unload Solenoids
  • Setup
  • Load
    • Figure 5 Manual Slide Valve Diagnostic Flow Chart - Load
  • Unload
    • Figure 6 Manual Slide Valve Diagnostic Flow Chart
• Checkout Procedure for MCSP Step Load Output
• Checkout Procedure for Step Load Solenoid Valve and Piston
• Power Supply
  • Figure 7 AC Power Connection To Modules
• Clear Language Display (CLD) 1U6 Keypad Overview
  • Figure 8 Operator Interface Adaptive Control
  • Select Report Group
  • Select Settings Group
  • Passwords
  • Select Report Group and Select Settings Group Flowcharts
  • Auto/Stop Keys
  • Power Up
    • Figure 9 CLD Module (1U6)
  • LEDs
• Chiller Module (CPM) (1U1)
  • Test Points
    • Figure 10 CPM (Chiller) Module (1U1)
  • I/O terminals
• Options Module (CSR) (1U2)
  • Test Points
  • Switch SW-1
  • External Setpoint Inputs (4-20ma/2-10VDC)
  • Setpoint Priority
    • Figure 11 Chilled Water Setpoint Arbitration
    • Figure 12 Current Limit Setpoint Arbitration
  • ICS Communications
  • I/O Terminals
    • Figure 13 CSR (Options) Module (IU2)
• Electronic Expansion Valve Module (EXV) (1U3)
  • Valve Operation
    • Figure 14 SEO 70, 100 Electronic Expansion Valve Cut Away View
    • Figure 15 SHEI Valve
  • Electronic Expansion Valve Location
    • Figure 16 Electronic Expansion Valve Location
  • Test Points
  • EXV Test
  • EXV Test Procedure
  • Electrical Integrity Test
  • Stroke Timing Test
  • SEO EXV Valve Winding Resistance Check
  • SEHI EXV Valve Winding Resistance Check
  • Solder Techniques for Installation
  • SEO Electronic Expansion Valve Servicing
    • Figure 17 Electronic Expansion Valve Soldering
    • Figure 18 SEO Electronic Expansion Valve Exploded View
  • SEHI Electronic Expansion Valve Servicing
    • Figure 19 SEHI Electronic Expansion Valve Exploded View
    • Figure 20 SEO Electronic Expansion Valve Module (1U3)
    • Figure 21 SEHI Electronic Expansion Valve Module (1U3)
  • I/0 terminals
• Compressor Module (MCSP) (1U4 AND 1U5)
  • Test Points
  • IPC Address Switch SW1
  • Current Gain (or Overload) Dip Switch SW2
  • Binary Inputs
  • Temperature Inputs
  • Current Inputs
  • Isolated Binary Input: Winding Temperature
  • Relay Outputs
  • Triac Outputs
  • I/O Terminals
    • Figure 22 Compressor Module (MCSP) (1U4 and 1U5)
• Interprocessor Communication Bridge Module (IPCB) (1U7)
  • Figure 23 IPCB Nominal Terminal Voltages
• LonTalk® Communications Interface - Chillers Module (LCI-C) (1U8)
  • Figure 24 LCI-C Nominal Terminal Voltages
• Inverter Diagnostics
• Troubleshooting Procedure
  • Figure 25 Variable Speed Fan Inverter
• Service Pumpdown
  • Service Pumpdown Procedure
  • COMPRESSOR TEST
  • Invoking Compressor Test
• Circuit Lockout
  • Invoking Circuit Lockout
• Circuit Diagnostic Reset
  • Invoking Circuit Diagnostic Reset