Under/Over Voltage Protection Enable; Phase Reversal Protection Enable; Phase Unbalance Limit Enable; Momentary Power Loss (Mpl) Protection Enable - Trane CVHE Information Manual

Under/Over Voltage Protection Enable

This screen does not appear if the Line Voltage
Sensing Option is not installed or Compressor Power
Source is Engine/Generator.
Line voltage above + 10% of nominal. (Must hold = +
10 % of nominal. Must trip = + 15 % of nominal.
Reset differential = min. of 2% and max. of 4%. Time
to trip = minimum of 1 min. 10 sec. and maximum of
5 min. 20 seconds).
Under/Over Voltage Protection:
Press (+)(-) to Change Setting
Possible values of [d/e] are: Disable (Factory
Default) and Enable.
Note: Under/Over Voltage Protection is activated
only if Under/Over Voltage Protection is enable and
Line Voltage Sensing Option is Installed.

Phase Reversal Protection Enable

This screen does not appear if the starter type is
"Adaptive Frequency" or "AFDB."
Phase Reversal Protection: [d/e]
Press (+)(-) to Change Setting
Possible values of [d/e] are: Disable and Enable
(Factory Default).
A phase reversal is detected on the incoming current.
On a compressor startup, the phase reversal logic
must detect and trip in 0.7 seconds.

Phase Unbalance Limit Enable

Phase Unbalance Limit:
Press (+)(-) to Change Setting
Possible values of [d/e] are: Disable and Enable
(Factory Default).
The RLA of the motor is derated by resetting the
active current limit. The trip point is a 30% phase
unbalance for 90 seconds.
Information Manual
Momentary Power Loss (MPL) Protection
Enable
This screen does not appear if the starter type is
"Adaptive Frequency" or "AFDB." or Compressor
Power Source is Engine/Generator.
Momentary Power Loss Protection: [d/e]
Press (+)(-) to Change Setting
Possible values of [d/e] are: Disable and Enable
[d/e]
(Factory Default).
For MPL, on every power down, the reset inhibit
timer is reset to 30 seconds if the motor temperature
°
is <165
> or = to 165

Enhanced Oil Temp. Protection

This screen does not appear if the starter type is
"Adaptive Frequency" or "AFDB.
When enhanced oil protection is enabled, the oil
heater relay is energized at 140.5ºF (60.3ºC) and de-
energized at 145.5ºF (63.1ºC). The low oil
temperature cutout "setpoint" is equal to the
saturated evaporator refrigerant temperature plus
30ºF (16.6ºC) or 100 ºF (37.8ºC) which ever is
larger."
Enhanced Oil Temp Protection: [option]
Press (+)(-) to Change Setting
Possible options are: Disable and Enable (Factory
Default).

Oil Temp Setpoint

This screen does not appear when Enhanced Oil
[d/e]
Temperature Protection is enabled.
Oil Temp SetPoint: xxx.x f/c
Press (+)(-) to Change Setting
The range of values is 100
°
71.1 C) in increments of 1 or 0.1
F and 15 minutes if the motor temperature is
°
F.
°
F to 160
Field Start-up
°
F (37.8 to
° °
F or C, depending
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