10 - 10 RTHC-IOM-1C
Rfgt Monitor
Level 1 Rfgt
Alarm
IFW N/A The Refrigerant Monitor has read a refrigerant concentration greater
or equal to the level 1 setpoint.
N/A
Rfgt Monitor
Memory Lost
IFW N/A Refrigerant Monitor lost battery backed-up RAM.
a. IFW to the chiller, MMR/MAR to the Refrigerant Monitor.
See Refrigerant
Monitor IOM
Manual
Rfgt Monitor Out
Of Temp Range
IFW N/A Out of temperature range for measuring refrigerant concentration. Check Bench
Heater, Wiring,
Connections
Rfgt Monitor
Refired Level Too
Low
IFW N/A The Refrigerant Monitor read less than or equal to -5 ppm refrigerant
concentration.
Recalibrate
Refrigerant Monitor
Rfgt Monitor
Scanner Flow
Loss
IFW N/A Air flow loss to the Refrigerant Monitor scanner.
a. IFW to the chiller, MMR/MAR to the Refrigerant Monitor.
See Refrigerant
Monitor IOM
Manual
Refrigerant
Monitor Sensor
IFW-AR N/A Open or Shorted input and the Rfgt Monitor is setup as installed at
the Clear Language Display.
Check Sensor,
Wiring, and
Connections
Rfgt Monitor
Temp Sensor
IFW N/A Refrigerant Monitor bench temperature sensor failure.
a. IFW to the chiller, MAR to the Refrigerant Monitor.
Check Sensor,
Wiring,
Connections
Severe Phase
Unbalance
MMR Friendly a. A 30% Phase Unbalance diagnostic has been detected. Check
the Current Transformer Part Numbers (they should all match),
Current Transformer resistances, line voltage phase balance, all
power wiring connections, the contactor pole faces, and the motor. If
all these are OK, replace the Starter module.
Check Main Power
Supply & Wiring
Solid State
Starter Fault Rly
Open
MMR Immediate The
sss
fault relay is open indicating a fault condition. Check Solid State
Starter Wiring &
Fault Relay
Starter Contactor
Interrupt Failure
MMR Special
Action
Required.
Detected compressor currents greater than 5% on any or all phases
when the compressor was commanded off. Detection time shall be 5
seconds minimum and 10 seconds maximum. When detected, this
will generate the diagnostic, energize alarm relay, unload
compressor, continue to command the affected compressor off, and
energize the shunt trip circuit breaker output for a disconnect
means. For as long as current continues, the evap and cond. pumps
are commanded on as well as the oil line solenoid energized, the oil
return gas pump cycled, and liquid level with EXV controlled.
Complete Starter
Checkout Required
Starter did not
Transition
MMR Immediate a. The UCP2 did not receive a transition complete signal in the
designated time from the UCP2 command to transition. The must
hold time from the UCP2 transition command is 1 second. The Must
trip time from the transition command is 6 seconds. Actual design is
2.5 seconds.
b. Item a. above is active only for Y-Delta, Auto-Transformer,
Primary Reactor, and X-Line Starters.
Complete Starter
Checkout Required
Starter Dry Run
Test
MMR Immediate While in the Starter Dry Run Mode either 50% Line Voltage was
sensed at the Potential Transformers or 10% RLA Current was
sensed at the Current Transformers.
Check Starter
Wiring
Starter Fault Type
I
MMR Immediate a. This is a specific starter test where (1K1) is closed first and a
check is made to ensure that there are no currents detected by the
CT’s. If currents are detected when only 1K1 is closed first at start,
then one of the other contactors is shorted.
b. This test applies only to factory installed Y-Delta Closed
Transition Starters.
See
Troubleshooting
Service Bulletin
Diagnostic
Description
Diagnostic
Type
Shutdown
Action
Cause Help Message
To Next Page
Loading...
