Installation and Maintenance Manual
Table Of Contents
- Warnings, Cautions and Notices
- Model Number Description
- General Information
- Pre-Installation
- Unit Dimensions/Weights
- Installation - Mechanical
- Location Requirements
- Rigging
- Evaporator Piping
- Condenser Water Piping (RTWD Units Only)
- Refrigerant Relief Valve Venting
- RTUD Installation
- System Configuration
- Equivalent Line Length
- Liquid Line Sizing
- Discharge (Hot Gas) Line Sizing
- Example
- Refrigerant Charge Determination
- RTUD Chilled Water Flow Control
- Oil Charge Determination
- Outdoor Air Temperature Sensor Installation Requirements
- Fan Control for the Remote Air Cooled Condenser
- RTUD Condenser Elevation Setting
- Shipping Spacers
- Installation - Electrical
- RTWD/RTUD Operating Principles
- Controls Interface
- Pre-Start Checkout
- Unit Start-Up Procedures
- Unit Shutdown
- Service and Maintenance
- Diagnostics
- Wiring Schematics

Diagnostics
RLC-SVX09H-EN 197
Main Processor Diagnostics
Starter Fault Type III –
Compressor 2A
*Circuit Immediate Latch
Starting
[Adaptive Frequency
Starter Type]
As part of the normal start sequence to apply
power to the compressor, the Shorting Contactor
(1K3) and then the Main Contactor (1K1) were
energized. 1.6 seconds later there were no
currents detected by the CT's for the last 1.2
seconds on all three phases. The test above
applies to all forms of starters except Adaptive
Frequency Drives.
Local
Transition Complete Input
Opened – Compressor 1A
*Circuit
Immediate
Latch
All running modes
The Transition Complete input was found to be
opened with the compressor motor running after
a successful completion of transition. This is active
only for Y-Delta, Auto-Transformer, Primary
Reactor, and X-Line Starters. To prevent this
diagnostic from occurring as the result of a power
loss to the contactors, the minimum time to trip
must be greater than the trip time for the power
loss diagnostic.
Local
Transition Complete Input
Opened – Compressor 2A
*Circuit
Immediate
Latch All running modes
The Transition Complete input was found to be
opened with the compressor motor running after
a successful completion of transition. This is active
only for Y-Delta, Auto-Transformer, Primary
Reactor, and X-Line Starters. To prevent this
diagnostic from occurring as the result of a power
loss to the contactors, the minimum time to trip
must be greater than the trip time for the power
loss diagnostic.
Local
Transition Complete Input
Shorted – Compressor 1A
*Circuit Immediate Latch Pre-Start
The Transition Complete input was found to be
shorted before the compressor was started. This
is active for all electromechanical starters.
Local
Transition Complete Input
Shorted – Compressor 2A
*Circuit Immediate Latch Pre-Start
The Transition Complete input was found to be
shorted before the compressor was started. This
is active for all electromechanical starters.
Local
Under Voltage Chiller Normal
Non
Latch
Pre-Start and Any
Ckt(s) Energzd
Nom. trip: 60 seconds at less than 87.5%, 2.8% at 200V
1.8% at 575V, Auto Reset at 90% or greater.
Remote
Table 133. Starter Diagnostics
Diagnostic Name and
Source
Affects
Target Severity
Persist
ence
Active Modes
[Inactive Modes] Criteria
Reset
Level
Table 134. Main Processor Diagnostics
Diagnostic Name
Affects
Target Severity Persistence
Active Modes
[Inactive
Modes] Criteria
Reset
Level
BAS Communication
Lost
None
Special
Action
Non Latch All
The BAS was setup as "installed" at the MP and
the Lontalk LCIC lost communications with the
BAS for 15 contiguous minutes after it had been
established. Refer to Section on Setpoint
Arbitration to determine how setpoints and
operating modes may be effected by the comm
loss. The chiller follows the value of the Tracer
Default Run Command which can be previously
written by Tracer and stored nonvolatilely by
the MP (either use local or shutdown). Note
that this diagnostic is never operational for
BacNet Communication interface (BCIC) and
only operational with a LonTalk Communication
interface (LCIC) if so configured by the BAS or
Tracer system.
Remote