Trane RTHC - Phase Unbalance Limit Enable; Soft Load Current Limit Rate of Change; Momentary Power Loss Protection Enable; LWT Control Proportional Gain

Installation, Operation and Maintenance 5 - 23
Phase Unbalance Limit Enable
The UCM provides non-defeatable phase unbalance
protection that stops compressor operation with more
than 30% phase unbalance. If this unbalance limit is
enabled, the motor will be “limited” from running at
full load as a function of % unbalance. This feature
prevents excessive overheating that otherwise would
result. If the limit is disabled, then no current limit is
imposed due to phase unbalance.
where enabled is the ROM default.
Momentary Power Loss Protection Enable
where enabled is the ROM default.
Soft Load Control Enable
where disabled is the ROM default
Soft Load Starting Current Limit
The range of values is 40 to 100% in increments of
1%. The ROM default is 100%.
Soft Load Current Limit Rate Of Change
The range of values is 0.5 to 5%/Min in increments of
1 or 0.1%/Min depending on the service setup
screen. The ROM default is 5%/Min.
Soft Load Lvng Wtr Temp Rate of Change
The range of values is 0.5 to 5
°
F/Min (0.3 to 2.8
°
C/
Min) in increments of 1 or 0.1
°
F/Min depending on
the service setup screen. The ROM default is 5
°
F/
Min (2.8
°
C/MIn).
LWT Control Proportional Gain
The range of values is 0 to 100
%/
F (0 to 180%/C) in
increments of 0.1. The ROM default is 6.0%/F
(10.8%/C).
LWT Control Integral Reset Time
The range of values is 5 to 500 Seconds in
increments of 1. The ROM default is 60 sec.
LWT Control Rate Time
The range of values is 0 to 25 in increments of 0.1.
The ROM Default is 0 sec.
Phase Unbalance Limit: [d/e]
Press (+)(-) to Change Setting
Momentary Power Loss Protection: [d/e]
Press (+)(-) to Change Setting
Soft Load Control: [d/e]
Press (+)(-) to Change Setting
Soft Load Starting Current Limit: xxx%
Press (+)(-) to Change Setting
Soft Load Current Limit Rate: x.x%/min
Press (+)(-) to Change Setting
Soft Load Lvg Water Rate: x.x F/min
Press (+)(-) to Change Setting
LWT Control Proportional Gain: xxx.x%/F
Factory Default is 6.0%/F & 10.8%/C
LWT Control Integral Reset Time: xx sec
Press (+)(-) to Change Setting
LWT Control Rate Time: xx sec
Press (+)(-) to Change Setting