Trane RTHC User Manual

5 - 32 RTHC-IOM-1C
Expansion Valve Test
The expansion valve EIT and timing test can only be
enabled if the operating mode is local stop or
diagnostic shutdown stop. If the machine is in any
other operating mode, the second line of the display
will read “Unit Must Be In Stop To Execute”.
where “disabled” is the ROM default.
The possible values of [status] while “Disabled” are:
“Press (+) (-) to Change Setting”
“Unit Must Be In Local Stop To Execute”
The possible values of [status] while “Enabled” are:
“Waiting for EIT Status”
“EIT in Progress”
“EIT Complete”
“EIT Test Failure”
“Timing Test In Progress”, or
“Timing Test Complete.”
If the EXV EIT test is successful the [d/e] field will
change back to “Disabled” and will not be
accompanied by a diagnostic. If the EIT test is
unsuccessful, a diagnostic will indicate the failure.
No diagnostics are indicated with the Timing Test,
however, you may listen to determine if the EXV
ratchets against the valve mechanical stops when
expected as tabulated below:
Table 23
EXV Self Test Sequence
The sequence is for the valve to close normally for the period indicated, then ratchet for the designated period, open normally for a period,
then ratchet again for the period given
EXV Control Mode/EXV Position Commands
The status of the EXV Control is as follows:
The possible values of mode are Auto (ROM default)
and Manual.
If the EXV control mode is Auto the following is
displayed:
If the EXV control mode is “Manual” the following is
displayed. When the EXV control mode is
transitioned from “Auto” to “Manual,” the manual
target is initialized to the current EXV position.
EXV Position/percent and Steps Open
Slide Valve Control Mode /Manual Load and
Unload Commands
The mode of the slide valve is as follows:
Expansion Valve Test: [d/e]
[status]
EXV Part Number
X15110743
Units Close Ratchet Open Ratchet (second)
-01 (200) RTHC “B” Frame Comp 10 5 10 5
-03 (400C) “D” Frame Comp. 13 2 13 2
-04 (300) “C” Frame 13 2 13 2
EXV Control Is: [mode]
Press (+)(-) to Change Setting
Expansion Valve Position: xxx.x% Open
Evap. Liquid Level: x.x inches
EXV Pos xxx.x% Target xxx.x% Open
Evap. Liquid Level: x.x inches
Expansion Valve Position: xxx.x% Open
Expansion Valve Position: xxxx Steps Open
Slide Valve Control Is: [mode]
LWT = xx.x F/C [Y]

Trane RTHC Specifications

General

Brand	Trane
Model	RTHC
Category	Chiller
Language	English