Trane VUV Installation, Operation And Maintenance Manual page 61

Figure 72. Verify value of 820 rpm
Figure 73. Change value on electric heat unit
Priority/Error Display
Under special conditions, the status display will interrupt briefly
to prioritize display of events:
Notes:
• During error displays, the user interface will be disabled,
until the error is removed or resolved.
Table 21. Error codes
mtr1
LOCK
mtr2
LOCK
mtr1
Displayed
Ospd
during
abnormal
operation.
mtr2
Ospd
Ramp
→
0000
→
2000
v123
UV-SVX005G-EN
Indicates a locked rotor condition of Motor 1. The motor will be locked out until the cause has
been resolved, and the power cycled; refer to
Fan Status function, if being used, will report an inoperative motor. Electric heat and
changeover heat will be shutdown.
Indicates a locked rotor condition of Motor 2. The motor will be locked out until the cause has
been resolved, and the power cycled; refer to
Motor 1 will continue to operate, but will not be monitored. Fan Status function, if being used,
will report an inoperative motor. Electric heat and changeover heat will be shutdown.
Indicates that Motor 1 has experienced a run-away or over speed condition, and has been
shutdown. The unit will offer limited "limp-in" performance, and Motor 2 will continue to
operate, but will not be monitored. Fan Status function, if being used, will report an
inoperative motor.
Refer to "ECM Motors," p. 114
cycled. Electric heat and changeover heat will be shutdown.
Indicates that Motor 2 has experienced a run-away or over speed condition, and has been
shutdown. The unit will offer limited "limp-in" performance, and Motor 1 will continue to
operate, but will not be monitored. Fan Status function, if being used, will report an
inoperative motor.
Refer to "ECM Motors," p. 114
cycled. Electric heat and changeover heat will be shutdown.
Indicates the motor is transitioning between speeds, ramping up or down. The message
2000
"RAMP" is briefly displayed, followed by the target speed for "Motor 1" only. Once the target
speed has been reached, the status display will resume operation.
0000
On power on, the version of software is briefly displayed, followed by the results of a POST
(power on self test).
Example 4:
Change the value of a protected value on an
electric heat unit.
It appears the value has been changed, but after checking the
value, the original value has been retained.
• If changes are made to parameters and saved, most
settings take effect immediately. Any change to fan speeds
will take effect and cause the configuration menu to exit
immediately to begin tracking speeds via the on-board
tachometer.
• If a error occurs while the configuration menu is in effect,
all unsaved values will be discarded and the error codes
will be displayed.
"ECM Motors," p. 114
"ECM Motors," p. 114
to reset, the cause must be resolved and the power to the unit
to reset, the cause must be resolved and the power to the unit
ECM Overview and Setup
for resolution details.
for resolution details.
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