Main Processor Diagnostics
RLC-SVU05A-E436
Diagnostic Name
Affects
Ta r g e t
Severity Persistence
Active Modes
[Inactive Modes]
Criteria Reset Level
Fan Inverter Fault -
Circuit 1
Circuit (fan
control)
Special Mode
(or in single
fan deck:
Circuit
Immediate
shutdown
NonLatch (or
in single fan
deck:Latch)
Prestart and Running
w/ Low Ambient
Variable Spd Fan
configured
A fault signal has been detected from the respective
condenser's Variable Speed Inverter Drive (fan).
Condenser Fan control will revert to constant speed
operation without the use of the inverter's fan. If the
inverter's fault clears, fan control will switch back to
variable speed. For single fan deck configurations, this
diagnostic causes a latching circuit shutdown
Fan Inverter Fault -
Circuit 2
Circuit (fan
control)
Special Mode
(or in single
fan deck:
Circuit
Immediate
shutdown
NonLatch (or
in single fan
deck:Latch)
Prestart and Running
w/ Low Ambient
Variable Spd Fan
configured
A fault signal has been detected from the respective
condenser's Variable Speed Inverter Drive (fan).
Condenser Fan control will revert to constant speed
operation without the use of the inverter's fan. If the
inverter's fault clears, fan control will switch back to
variable speed. For single fan deck configurations, this
diagnostic causes a latching circuit shutdown
BAS Failed to
Establish
Communication
None Special
Action
NonLatch
At power-up The BAS was setup as "installed" and the BAS did not
communicate with the Lontalk LCIC within 15 minutes
after chiller controls power-up. Refer to Section on
Setpoint Arbitration to determine how setpoints and
operating modes may be effected. Note that this
diagnostic is never operational for BacNet
Communication interface (BCIC) and only operational
with a LonTalk Communication interface (LCIC) if so
configured by the BAS or Tracer system.
Remote
BAS
Communication
Lost
None Special
Action
NonLatch
All The BAS was setup as "installed" at the MP and the
Lontalk LCIC lost communications with the BAS for 15
contiguous minutes after it had been established. Refer
to Section on Setpoint Arbitration to determine how
setpoints and operating modes may be effected by the
comm loss. The chiller follows the value of the Tracer
Default Run Command which can be previously written
by Tracer and stored nonvolatilely by the MP (either use
local or shutdown). Note that this diagnostic is never
operational for BacNet Communication interface (BCIC)
and only operational with a LonTalk Communication
interface (LCIC) if so configured by the BAS or Tracer
system.
Remote
Low Evaporator
Liquid Level -
Circuit 1
None Info
NonLatch
Starter Contactor
Energized [all Stop
modes]
The liquid level sensor is seen to be at or near its low
end of range for 80 contiguous minutes while the
compressor is running and the EXV has not been in low
differential pressure control during that time. Design:
approx 20% or less of bit count corresponding to -40
mm or less liquid level for 80 minutes - the minute
counter is reset if EXV is in Low DP control for 5
iterations (10 sec) implemented as an integral.
Remote
Low Evaporator
Liquid Level -
Circuit 2
None Info NonLatch
Starter Contactor
Energized [all Stop
modes]
The liquid level sensor is seen to be at or near its low
end of range for 80 contiguous minutes while the
compressor is running and the EXV has not been in low
differential pressure control during that time. Design:
approx 20% or less of bit count corresponding to -40
mm or less liquid level for 80 minutes - the minute
counter is reset if EXV is in Low DP control for5
iterations (10 sec) implemented as an integral .
Remote
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