Trane RTHC - Design Delta Temperature; This value should be set at the delta temperature specified for the chiller during the initial selection...; Maximum Restart Inhibit Timer Setting; The range of values is 5 to 20 minutes in increments of 1 minute.

Module Power and Miscellaneous I/O
86 RTHC-SVD01B-EN
13-8. TCI-COMM 3 and 4 (1U6)
13-8 a. Test Points
There are two test points (TP) associated with the TCI modules. They
are easily read with a DC voltmeter by probing the PC board solder
pads found in the upper left hand corner each module. The positive
meter lead should be connected to the pad while referencing the nega-
tive meter lead to the board edge ground plane. The DC voltages shall
be within the following tolerances. If not, replace the module.
Do not use the aluminum module enclosure as the reference as it
has an anodized surface with insulating properties.
13-8 b. ICS Communications
ICS communication is handled the same as on previous products
using the Trane proprietary Comm3 or Comm4 standard isolated serial
communication link. The following are some things to check when
experiencing loss of ICS communications:
1. If ICS control is desired, check that Tracer has been selected in
Setpoint Source of the Operator Settings Menu. In any case, the
ICS Tracer should be able to communicate to the chiller for moni-
toring purposes, regardless of the Setpoint Source selection.
2. Check for the proper ICS address in the Service Settings Menu
and compare to the address programmed at the ICS device.
3. Check for proper termination of the twisted pair communication
link wiring to J3-1and 2 and J3-3 and 4.
Table 13-12: Test Point Voltages for 1U6 Module
Test Point Voltage (VDC)
TP1 4.8 to 5.2
TP2 23 to 25