Diagnostics; System Status/Diagnostics; System Status / Diagnostics Checkout; Required) - Trane Voyager Commercial Installation, Operation And Maintenance Manual

Diagnostics

The RTRM has the ability to provide the service
personnel with some unit diagnostics and system
status information.
Before turning the main power disconnect switch
"Off", follow the steps below to check the Unit Control.
All diagnostics and system status information stored in
the RTRM will be lost when the main power is turned
"Off".
W W A A R R N N I I N N G G
L L i i v v e e E E l l e e c c t t r r i i c c a a l l C C o o m m p p o o n n e e n n t t s s ! !
F F a a i i l l u u r r e e t t o o f f o o l l l l o o w w a a l l l l e e l l e e c c t t r r i i c c a a l l s s a a f f e e t t y y p p r r e e c c a a u u t t i i o o n n s s
w w h h e e n n e e x x p p o o s s e e d d t t o o l l i i v v e e e e l l e e c c t t r r i i c c a a l l c c o o m m p p o o n n e e n n t t s s c c o o u u l l d d
r r e e s s u u l l t t i i n n d d e e a a t t h h o o r r s s e e r r i i o o u u s s i i n n j j u u r r y y . .
W W h h e e n n i i t t i i s s n n e e c c e e s s s s a a r r y y t t o o w w o o r r k k w w i i t t h h l l i i v v e e e e l l e e c c t t r r i i c c a a l l
c c o o m m p p o o n n e e n n t t s s , , h h a a v v e e a a q q u u a a l l i i f f i i e e d d l l i i c c e e n n s s e e d d e e l l e e c c t t r r i i c c i i a a n n
o o r r o o t t h h e e r r i i n n d d i i v v i i d d u u a a l l w w h h o o h h a a s s b b e e e e n n p p r r o o p p e e r r l l y y t t r r a a i i n n e e d d
i i n n h h a a n n d d l l i i n n g g l l i i v v e e e e l l e e c c t t r r i i c c a a l l c c o o m m p p o o n n e e n n t t s s p p e e r r f f o o r r m m
t t h h e e s s e e t t a a s s k k s s . .
HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK
HTB1 OR UNIT DISCONNECT SWITCH.
1. Verify that the LED on the RTRM is on. If the LED is
on or blinking (2 blinks every 2 seconds). If so, go to
step 3.
2. If the LED is not on, verify that 24 Vac is present
between RTRM J1-1 and J1-2. If 24 Vac is present,
proceed to Step 3. If 24 Vac is not present, check the
unit main power supply, check transformer (TNS1)
and fuse. If the LED is not on or blinking yet 24Vac
is present, the RTRM has failed and must be
replaced.
3. If the LED is blinking, a diagnostic is present. If the
LED is on, certain diagnostics may still be present.
Utilizing "System Status/Diagnostics," p.
check the following system status:
• Service status
• Heating status
• Cooling status
4. If any diagnostic is seen, refer to the appropriate
Diagnostics section for CV, SZ VAV, or Traditional
VAV units. Once the condition causing the
diagnostic is cleared, proceed to the next step.
5. If no diagnostics are present, use one of the TEST
mode procedures described in
to start the unit. This procedure will allow you to
check all of the RTRM outputs, and all of the
external controls (relays, contactors, etc.) that the
RTRM outputs energize, for each respective mode.
Proceed to the next step.
6. Step the system through all of the available modes
and verify operation of all outputs, controls, and
modes. If a problem in operation is noted in any
RT-SVX34R-EN
129,
"Test Modes," p. 67
mode, you may leave the system in that mode for
up to one hour while troubleshooting. Refer to the
sequence of operations for each mode to assist in
verifying proper operation. Make the necessary
repairs and proceed to the next step.
7. If no abnormal operating conditions appear in the
test mode, exit the test mode by turning the power
"Off" at the main power disconnect switch.
8. Refer to the individual component test procedures if
other microelectronic components are suspect.

System Status/Diagnostics

System status and/or diagnostics can be observed at
the ZSM, through ICS, or at the unit by using a DC
voltmeter. The LED on the RTRM module does not
indicate whether diagnostics are present or not. This
RTRM LED is an indicator that the RTRM has power,
and it pulses during the TEST mode.
Figure 103. Terminal locations

System Status / Diagnostics Checkout

Procedure (DC Voltmeter Required)
The method described below to determine unit status
or to see if diagnostics are present assumes the Zone
Sensor or NSB panel is not within sight or close by or is
not being used. If a zone sensor is within sight
however, DC readings need not be taken - just look at
the LED or display and go to STEP 3.
1. Measure and record DC voltage from J6-6
(common) to each output: J6-7, J6-8, J6-9, and J6-
10.
2. Using the data below, determine if each output is
ON, OFF, or PULSING.
All voltages are approximate - this is a sensitive
circuit, so the type of voltmeter used, sensor
connections etc. may all slightly affect the reading.
ON = 30Vdc if no NSB or ZSM with LED's is
connected, 25 Vdc if NSB panel (BAYSENS119*) is
connected, 2Vdc if ZSM w/ LED's (BAYSENS110*,
BAYSENS021*) is connected.
OFF = 0.75 Vdc regardless of ZSM / NSB connection
PULSING (DIAGNOSTIC PRESENT) = A distinct
pulsing from 0.75 Vdc to 30 Vdc will be seen
129