Trane Tracer CH530 - Evaporator Pressure, Water Temperature, and Condenser Flow Diagnostics

41CG-SVU02C-E4
Main Processor Diagnostics
Diagnostic Name
Affects
Ta r g e t
Severity Persistence
Active Modes
[Inactive Modes]
Criteria Reset Level
High Evaporator
Refrigerant Pressure
Chiller Immediate
NonLatch
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
NonLatch
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
Condenser Water
Flow Overdue
Chiller Normal
NonLatch
Estab Cond Water
Flow
Condenser water flow was not proven within 20
minutes of the condenser pump relay being energized.
The Cond Pump shall be commanded off. Diagnostic is
reset with return of flow (although only possible with
external control of pump).
Remote
Condenser Water
Flow Lost
Chiller Immediate
NonLatch
Start and All Run
Modes
The condenser water flow proof input was open for
more than 6 contiguous seconds (or 15 seconds for
thermal dispersion type flow switch) after flow had been
proven. This diagnostic is automatically cleared once the
compressor is stopped by a fixed time out of 7 sec. In
Cooling Mode: The Cond Pump shall be commanded off
but the Evap pump command will not be effected. -
once the diagnostic auto clears, if diff to start is met,
the cond pump can be restarted. In Heating Mode: The
Cond Pump shall remain on, and the Evap pump shall
shut off - once diagnostic auto clears, if diff to start is
met, the chiller may restart normally and the evap pump
can be restarted.
Remote