Trane CGWN 205-211 - Manual (Page 28)

Diagnostics
CG-SVU02B-E4 28
Evaporator Water
Flow Lost Pump 1
(or Pump 2) Chiller Warning and
Special Action
NonLatch Evap pump
commanded on
After flow had been proven the chilled water flow input
was open for more than 4 continuous seconds. The
evaporator pump control will switch control to the
redundant pump. If redundant pump is not available,
diagnostic will clear when flow is established. Remote
Evaporator Water
Flow Overdue
Pump 1 (or
Pump 2) Chiller Warning and
Special Action
NonLatch Estab. Evap. Water
Flow on going from
STOP to AUTO.
Evaporator water flow was not proven within a user
adjustable time of the evaporator water pump relay being
energized. Diagnostic is reset with return of evaporator
water flow. Remote
Fault Detected:
Evaporator Water
Pump 1 (or
Pump 2) Chiller Warning and
Special Action
NonLatch All Detection of a pump fault will cause pump control to
switch to the redundant pump. Remote
Condenser Water
Flow Lost Pump 1
(or Pump 2) Chiller Warning and
Special Action
NonLatch Start and All Run
Modes
After flow had been proven the condenser water flow
input was open for more than 4 continuous seconds. This
diagnostic is automatically cleared once all circuits are de-
energized. Remote
Condenser Water
Flow Overdue
Pump 1 (or
Pump 2) Chiller Warning and
Special Action
NonLatch Estab Cond Water
Flow
Condenser water flow was not proven within a user
adjustable time of the condenser water pump relay being
energized. Remote
Fault Detected:
Condenser Water
Pump 1 (or
Pump 2) Chiller Warning and
Special Action
NonLatch All Detection of a pump fault will cause pump control to
switch to the redundant pump. Remote
Fan Fault Circuit Warning NonLatch All The fan fault input was open for more than 5 seconds. Local
High Condensing
Pressure Pump
Add Chiller Warning Latch Running When running in parallel pump control, with one pump
on, a high condensing pressure will force add the second
pump. It will latch on to prevent pump cycling. Remote