Installation and Maintenance Manual

Diagnostics
RLC-SVX09H-EN 201
High Discharge
Temperature –
Compressor 2A
Circuit Immediate Latch
All
[compressor run
unload or
compressor not
running]
The compressor discharge temperature exceeded
200F (without oil cooler) or 230ºF (with oil cooler).
This diagnostic will be suppressed during Run-Unload
or after the compressor has stopped. Note: As part of
the Compressor High Temperature Limit Mode (aka
Minimum Capacity Limit), the compressor shall be
forced loaded as the filtered discharge temperature
reaches 190ºF(without oil coolers), or 220ºF (with oil
coolers).
Remote
High Evaporator Liquid
Level – Circuit 1 (early
Phase 1 RTWD
production only –
eliminated in 2nd
Phase 1 release in Sept
08)
Circuit Normal Latch
Starter Contactor
Energized [all Stop
modes]
The liquid level sensor is seen to be at or near
its high end of range for 80 contiguous minutes
while the compressor is running. (The
diagnostic timer will hold, but not clear when
the circuit is off). Design: approx 80% or more
of bit count corresponding to +30 mm or more
liquid level for 80 minutes)
Remote
High Evaporator Liquid
Level – Circuit 2 (early
Phase 1 RTWD
production only –
eliminated in 2nd
Phase 1 release in Sept
08)
Circuit Normal Latch
Starter Contactor
Energized [all Stop
modes]
The liquid level sensor is seen to be at or near
its high end of range for 80 contiguous minutes
while the compressor is running. (The
diagnostic timer will hold, but not clear when
the circuit is off). Design: approx 80% or more
of bit count corresponding to +30 mm or more
liquid level for 80 minutes)
. Remote
High Evaporator
Refrigerant Pressure
Chiller Immediate Non Latch All
The evaporator refrigerant pressure of either
circuit has risen above 190 psig. The
evaporator water pump relay will be de-
energized to stop the pump regardless of why
the pump is running. The diagnostic will auto
reset and the pump will return to normal control
when all of the evaporator pressures fall below
185 psig. The primary purpose is to stop the
evaporator water pump and its associated
pump heat from causing refrigerant side
pressures, close to the evaporator relief valve
setting, when the chiller is not running, such as
could occur with Evap Water Flow Overdue or
Evaporator Water Flow Loss Diagnostics
Remote
High Evaporator Water
Temperature
Chiller
Info and
Special Action
Non Latch
Only effective if
either
1)Evap Wtr Flow
Overdue,
2)Evap Wtr Flow
Loss, or 3)Low Evap
Rfgt Temp,-Unit
Off, diagnostic is
active.
The leaving water temperature exceeded the high
evap water temp limit (TV service menu settable –
default 105F) for 15 continuous seconds. The
evaporator water pump relay will be de-energized to
stop the pump but only if it is running due one of the
diagnostics listed on the left. The diagnostic will auto
reset and the pump will return to normal control when
the temperature falls 5F below the trip setting. The
primary purpose is to stop the evaporator water pump
and its associated pump heat from causing excessive
waterside temperatures and waterside pressures
when the chiller is not running but the evap pump is on
due to either Evap Water Flow Overdue, Evaporator
Water Flow Loss, or Low Evap Temp – Unit Off
Diagnostics. This diagnostic will not auto clear solely
due to the clearing of the enabling diagnostic.
Remote
High Motor
Temperature -
Compressor 1A
Circuit Immediate Latch All
The respective compressor’s motor winding
thermostat is detected to be open
Local
High Motor
Temperature -
Compressor 2A
Circuit Immediate Latch All
The respective compressor’s motor winding
thermostat is detected to be open
Local
Table 134. Main Processor Diagnostics (continued)
Diagnostic Name
Affects
Target Severity Persistence
Active Modes
[Inactive
Modes] Criteria
Reset
Level