Component Failure Mode - Trane Voyager RT-SVX17C-EN Installation Operation & Maintenance

COMPONENT FAILURE RESPONSE
1. Economizer in minimum
position. Will not
modulate.
(OAS) Outdoor
Air Sensor
2. ODM3 will not cycle off
(runs continuously)
(RAS) Return Air 1. Economizer operates
Sensor using Reference
Enthalpy
(MAS) Supply 1. Economizer in minimum
Air Sensor position, will not
modulate.
(OHS) Outdoor 1. Uses Dry Bulb operation
Humidity Sensor and economizes if
below 60 F DB.
(RHS) Return Humidity 1. Economizer operates
Sensor using Referance
Enthalpy.
Remote 1. Economizer modulates
Minimum position but minimum position
Potentiometer stays at zero.
Cooling Setpoint 1. Uses HSP and CSP
(CSP) for CV CSP= HSP + 4 F or use
ZSM slide RTRM Default Mode.
potentiometer
Heating Setpoint 1. Uses CSP and HSP
(HSP) for CV HSP= CSP - 4 F.
ZSM slide
potentiometer
HSP and CSP for CV 1. Cannot control at ZSM,
are both lost. unit using RTRM Default
Mode
*NONE* = No LED indication

Component Failure Mode

NORMAL RANGE
Heat and cool failure output at
RTRM J6-7 to J6-6 and
055 to 175 F RTRM J6-8 to J6-6.
680K to 1.2K Heat and cool LED's
blink at ZSM
Check at RTRM
connector P8, between
P8-1 & P8-2.
055 to 175 F Check at RTRM
680K to 1.2K connector P8
0 to 209 F ECA LED 4 Flashes.
90K to 7.1K Check at ECA
connector P1 between
P10-1 & P10-2.
0 to 209 F ECA 8 flashes.
90K to 7.1K
ECA 6 flashes.
4 to 20 mA Check at ECA
10 to 90% RH OAH-1 and OAH-2 by
Honeywell measuring current draw.
C7600A.
ECA 3 flashes.
4 to 20 mA Check at ECA
10 to 90% RH RAH-1 and RAH-2 by
Honeywell measuring current draw.
C7600A.
potentiometer range *NONE* Check resistance
50 to 200 at ECA P and P1
Ohms. 50 to 200 Ohms.
100 to 900 *NONE* Check at
Ohms terminals 2 and 3 on ZSM
Use ZSM Test
Procedures.
100 to 900 *NONE* Check at
Ohms terminals 2 and 5 on ZSM.
Use ZSM Test
Procedures.
If a sensor is used at
RTRM J6-1 and J6-2,
100 to 900 Cool Failure Output
Ohms approx. at RTRM J6-8 to J6-6
Use ZSM Test "COOL" LED Blinks
Procedures. at ZSM
73
DIAGNOSTIC