152 RLC-SVX07A-EN
Diagnostics
Tracer Communications Loss IFW
a. While the chiller switch was in AUTO/REMOTE the
communications between the CSR and the connected
remote device, e.g., a Tracer or Remote Display, had
either never been established for more than 15 minutes
after power up or had been lost for more than 15
minutes after it had been established; use the Front
Panel Setpoints and the Default Chiller Auto/Stop.
b. In AUTO/LOCAL communications had been established
and was then lost for more than 15 minutes. Regardless
of the remote communications status the UCM uses
Front Panel setpoints.
NOTE: The active modes for this diagnostic follow
the positions of the chiller switch which account for
other chiller modes.
Under Voltage MAR Line voltage below - 10% of nominal or the Under/Over trans-
former is not connected. (Must hold = -10% of nominal. Must
trip = -15% of nominal. Reset differential = min. of 2% and
max. of 4%. Time to trip = min. of 10 sec. and max. of 20 sec.)
Design: Nom. trip: 15 seconds at less than 87.5%. ± 2.8% at
200V. or ± 1.8% at 575V, Auto reset at 90.5% or greater.
U1 Indicating U2 Communications IFW The 1U1 has det. a loss of IPC comm from the 1U2 module.
U1 Indicating U3 Communications MMR The 1U1 has det. a loss of IPC comm from the 1U3 module.
U1 Indicating U4 Communications CMR The 1U1 has det. a loss of IPC comm from the 1U4 module.
U1 Indicating U5 Communications CMR The 1U1 has det. a loss of IPC comm from the 1U5 module.
U1 Indicating U6 Communications CMR The 1U1 has det. a loss of IPC comm from the 1U6 module.
U1 Indicating U7 Communications CMR The 1U1 has det. a loss of IPC comm from the 1U7 module.
U3 Indicating U1 Communications MMR The 1U3 has det. a loss of IPC comm from the 1U1 module.
U3 Indicating U4 Communications CMR The 1U3 has det. a loss of IPC comm from the 1U4 module.
U3 Indicating U5 Communications CMR The 1U3 has det. a loss of IPC comm from the 1U5 module.
U3 Indicating U6 Communications CMR The 1U3 has det. a loss of IPC comm from the 1U6 module.
U3 Indicating U7 Communications CMR The 1U3 has det. a loss of IPC comm from the 1U7 module.
U4 Indicating U1 Communications CMR The 1U4 has det. a loss of IPC comm from the 1U1 module.
U4 Indicating U3 Communications CMR The 1U4 has det. a loss of IPC comm from the 1U3 module.
U4 Indicating U5 Communications CMR The 1U4 has det. a loss of IPC comm from the 1U5 module.
U5 Indicating U1 Communications CMR The 1U5 has det. a loss of IPC corn from the 1U1 module.
U5 Indicating U3 Communications CMR The 1U5 has det. a loss of IPC corn from the 1U3 module.
U5 Indicating U4 Communications CMR The 1U5 has det. a loss of IPC comm from the 1U4 module.
U6 Indicating U1 Communications CMR The 1U6 has det. a loss of IPC comm from the 1U1 module.
U6 Indicating U3 Communications CMR The 1U6 has det. a loss of IPC comm from the 1U3 module.
U6 Indicating U7 Communications CMR The 1U6 has det. a loss of IPC comm from the 1U7 module.
Winding Temp - Cprsr A CMR
a. The motor winding temperature thermostat opened;
nominally 221 F.
b. The motor temp. thermostat or wiring is open.
c. Time to trip from input open to compressor shutdown
shall be 0.5 to 2.0 seconds.
Table 28 Diagnostic Codes
Diagnostic Description Type Cause
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