
Diagnostic Name Affects
Target
Severity
Persistence Active Modes
[Inactive Modes]
Criteria
Reset
Level
Comm Loss: Exter-
nal Auto/Stop
Chiller
Normal
Latch
All
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period.
Remote
Comm Loss: Emer-
gency Stop Feed-
back Input
Chiller
Normal
Latch
All
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period.
Remote
Comm Loss: Exter-
nal Ckt Lockout
Circuit
Special
Action
Latch
All
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period. MP
will nonvolatile hold the lockout state
(enabled or disabled) that was in effect
at the time of comm loss.
Remote
Comm Loss: Out-
door Air Tempera-
ture
Chiller
Normal
Latch
All
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period.
Remote
Comm Loss: Evapo-
rator Leaving Water
Temperature
Chiller
Normal
Latch
All
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period.
Remote
Comm Loss: Evapo-
rator Entering Water
Temperature
Chiller
Normal
Latch
All
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period. Note:
Entering Water Temp Sensor is used
in EXV pressure control as well as ice
making & CHW reset, so it must cause a
unit shutdown even if Ice or CHW reset
is not installed.
Remote
Comm Loss: Exter-
nal Chilled Water
Setpoint
Chiller
Special
Action
Latch
All
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period. Chiller
shall discontinue use of the External
Chilled Water Setpoint source and revert
to the next higher priority for setpoint
arbitration
Remote
Comm Loss: Exter-
nal Demand Limit
Setpoint
Chiller
Special
Action
Latch
All
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period. Chiller
shall discontinue use of the External
Demand limit setpoint and revert to the
next higher priority for Demand Limit
setpoint arbitration.
Remote
Comm Loss: Motor
Winding Thermostat
Compressor xA
Circuit
Normal
Latch
All
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period.
Remote
Comm Loss: Evap-
orator Water Flow
Switch
Chiller
Immediate
Latch
All
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period.
Remote
Comm Loss: Suction
Refrigerant Pressure
- xy
Cprsr
Immediate
Latch
All
[Ckt/Cprsr lock out]
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period.
Remote
Comm Loss: Con-
denser Refrigerant
Pressure
Circuit
Immediate
Latch
All
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period.
Remote
Comm Loss: Oil
Pressure - xy
Cprsr
Immediate
Latch
All
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period.
Remote
Comm Loss: Oil
Temperature - xy
Cprsr
Normal
Latch
All
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period.
Remote
Comm Loss: Oil
Loss Level Sensor
Input
Circuit
Normal
Latch
All
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period.
Remote
Comm Loss: Oil Re-
turn Line Solenoid
Valve -xy
Cprsr
Normal
Latch
All
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period.
Remote
Comm Loss: Com-
pressor Discharge
Rfgt Temperature -
xy
Cprsr
Normal
Latch
All
Continual loss of communication be-
tween the MP and the Functional ID has
occurred for a 30 second period.
Remote
Controls
Table 39.
92
RTAG-SVX001H-EN