Installation and Maintenance Manual

Diagnostics
78 RTAE-SVX001B-EN
Evaporator
Water Flow
Overdue
Chiller Normal NonLatch
Estab. Evap.
Water Flow on
going from STOP
to AUTO or Evap
Pump Override.
Evaporator water flow was not proven within 20 minutes of the
Evaporator water pump relay being energized in normal “Stop”
to “Auto” transition. If the pump is overridden to “On” for
certain diagnostics, the delay on diagnostic callout shall be only
255 seconds. The pump command status will not be affected by
this diagnostic in either case.
Remote
Excessive
Condenser
Pressure – Ckt1
Circuit Immediate Latch All
The condenser pressure transducer of this circuit has detected
a condensing pressure in excess of the design high side
pressure as limited by the particular compressor type.
Remote
Excessive
Condenser
Pressure – Ckt2
Circuit Immediate Latch All
The condenser pressure transducer of this circuit has detected
a condensing pressure in excess of the design high side
pressure as limited by the particular compressor type.
Remote
External
Chilled/Hot
Water Setpoint
None Info Latch All
a. Function Not “Enabled”: no diagnostics. b. “Enabled “: Out-
Of-Range Low or Hi or bad LLID, set diagnostic, default CWS to
next level of priority (e.g. Front Panel SetPoint).
Remote
External
Demand Limit
Setpoint
None Info Latch All
a. Not “Enabled”: no diagnostics. b. “Enabled “: Out-Of-Range
Low or Hi or bad LLID, set diagnostic, default CLS to next level
of priority (e.g. Front Panel SetPoint.
Remote
Failure to Arm
or Hold - AFD
1A
Circuit Info Nonlatch All
AFD 1A (controlling Compressor 1A) failed to respond in an
appropriate time with its status of Armed to Hold or Hold within
the allotted time of 1 minute of the sent command. (Arm to
Hold command sent; armed to Hold status received; Hold
command sent; Hold status received)
Local
Failure to Arm
or Hold - AFD
2A
Circuit Info Nonlatch All
AFD 2A (controlling Compressor 2A) failed to respond in an
appropriate time with its status of Armed to Hold or Hold within
the allotted time of 1 minute of the sent command. (Arm to
Hold command sent; armed to Hold status received; Hold
command sent; Hold status received)
Local
Failure to Arm
or Start - AFD
1A
Circuit Immediate Latch All
AFD 1A (controlling Compressor 1A) failed to arm or start
within the allotted time of 1 minute. (Arm to Start command
sent; armed to Start status received; Start command sent;
Started status received)
Local
Failure to Arm
or Start - AFD
2A
Circuit Immediate Latch All
AFD 2A (controlling Compressor 2A) failed to arm or start
within the allotted time of 1 minute. (Arm to Start command
sent; armed to Start status received; Start command sent;
Started status received)
Local
High
Differential Rfgt
Pressure - Ckt1
Circuit Normal Latch
Cprsr Energized
[Service/Op
Pumpdown]
The differential pressure for the respective circuit was above
275 Psid (1890 kPa) for 2 consecutive samples 5 seconds apart.
Remote
High
Differential Rfgt
Pressure - Ckt2
Circuit Normal Latch
Cprsr Energized
[Service/Op
Pumpdown]
The differential pressure for the respective circuit was above
275 Psid (1890 kPa) for 2 consecutive samples 5 seconds apart
Remote
High Discharge
Temperature –
Cprsr1A
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 Stopping mode 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 Discharge
Temperature –
Cprsr2A
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 Stopping Mode 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
Table 33. Main processor diagnostics (continued)
Diagnostic
Name
Affects
Target Severity Persistence
Active Modes
[Inactive
Modes] Criteria
Reset
Level