Trane CGAM Installation & Operation Manual page 144

Diagnostics
Table 78. Main processor diagnostics (continued)
Low Evap Leaving Water Temp: Unit On
Low Evap Leaving Water Temp: Unit On
Low Evap Leav Wtr Temp: On
Low Pressure Cutout
Low Pressure Cutout
Low Pressure Cutout
Low Refrigerant Temperature
Low Refrigerant Temperature
Low Refrigerant Temperature
Low Suction Superheat
Low Suction Superheat
Low Suction Superheat
MP: Could not Store Starts and Hours
MP: Could not Store Starts and Hours
MP: Starts and Hours Failure
MP: Non-Volatile Block Test Error
MP: Non-Volatile Block Test Error
MP: NV Block Test Error
MP: Non-Volatile Memory Reformatted
MP: Non-Volatile Memory Reformatted
MP: NV Memory Reformatted
MP: Reset Has Occurred
MP: Reset Has Occurred
MP: Reset Has Occurred
No Partial Heat Recovery
No Partial Heat Recovery
No Partial Heat Recovery
No Total Heat Recovery
No Total Heat Recovery
No Total Heat Recovery
144
Chiller
Immediate
and
NonLatch
Special
or
Action
Circuit
Circuit Immediate Latch
Circuit Immediate Latch
Circuit Immediate Latch
Platform Warning Latch
Platform Warning Latch
Platform Warning Latch
Chiller Warning NonLatch
Circuit Warning NonLatch
Heat Normal
NonLatch
Recovery Warning
The chilled water temp. fell below the cutout
setpoint for 30 degree F Seconds while a
compressor was running. Automatic reset occurs
when the temperature rises 2 F above the cutout
setting for 2 minutes. This diagnostic shall not de-
Any Ckt[s]
energize the Evaporator Water Pump Output. If
Energized [No
this diagnostic is active the Low Evap Leaving
Ckt(s) Energizd]
Water Temp: Unit Off diagnostic shall be
suppressed.
If evaporator protection temperature
sensors are installed, the effect is on the
appropriate circuit. Else, the effect is on the
chiller.
The suction refrigerant pressure fell below
All
the low pressure cutout trip point.
Circuit
Energized
The suction saturated refrigerant temperature
[Service
dropped below the Low Refrigerant Temperature
Pumpdown,
Cutout Setpoint for 16.67 C-seconds (30 F-
Operational
seconds).
Pumpdown]
Measured suction superheat stays below
2.22 °C for one continuous minute, with a 1
Ckt Energized
minute ignore time fro m the start of the
[Ckt Not
circuit.
Energized]
Suction Superheat = suction temp – sat.
suction temp.
MP has determined there was an error with
the previous power down store. Starts and
All
Hours may have been lost for the last 24
hours.
MP has determined there was an error with
All a block in the Non-Volatile memory. Check
settings.
MP has determined there was an error in a
All sector of the Non-Volatile memory and it was
reformatted. Check settings.
The main processor has successfully come
out of a reset and built its application. A
reset may have been due to a power up,
All installing new software or configuration.
This diagnostic is immediately and
automatically cleared and thus can only be
seen in the historic diagnostic list.
Ckt Energized
PHR entering water temperature is greater than
[Ckt Not
the discharge temperature by 1.11 C for 30
Energized]
continuous minutes.
This diagnostic is only effective if all the following
requirements are met: 1) Unit is running. 2) THR
Control is enabled. 3) THR entering water
temperature is less than 4 C, or discharge
temperature integral is greater than Discharge
Temperature Integral Limit in all the energized
circuits.
Unit energized
It shall be de-activated when any one of the
and THR control
following requirement is met: 1) THR entering
enabled [Unit
water temperature is greater than 5 C., and the
de-energized or
discharge saturated temperature is greater than
THR disabled]
minimum discharge saturated temperature in at
least one energized circuit, see Total Heat
Recovery Control Algorithm specification for
details. 2) THR entering water temperature is
invalid (comm loss or sensor diagnostic). 3) Total
Heat Recovery Control disabled. 4) No
compressor energized.
Remote
Local
Local
Local
Remote
Remote
NA
Remote
CG-SVX17E-EN