50 RT-SVD03G-EN
ReliaTel Test Mode
Test Mode
Service Tips:
• To ensure appropriate unit restart after operating in Service TEST MODE, Service TEST MODE
termination causes a system reset resulting in execution of the startup sequence identical to
initial power-on startup.
• To prevent undesired activation of Service TEST MODE at startup, Service TEST MODE can only
be activated after an open condition has been detected on the Service Test terminals.
• When initiating the test mode immediately after power-up, the RTRM 20 seconds self-test must
be completed before the test mode will work.
• The TEST MODE bypasses timing functions including minimum run times.
• TEST MODE does not bypass safety controls such as the high temperature limit switch, high
pressure control or smoke detector circuits.
• To help with troubleshooting, unplug J4 from the RTRM. This removes all optional components
such as the COMM3/4, ECA and RTOM. (this may prevent key features from functioning. Avoid
this procedure on 27.5-50 ton units as the V3 configuration will be lost).
• Some test functions do not work with LCI installed. Remove LCI from the circuit before entering
the TEST mode.
Emergency Stop input, LTB 5&6 (3J1-12 on RTRM)
If this input is open, the indoor fan, heat & cooling will not run in the TEST MODE. The diagnostic
for this condition is HEAT FAIL + COOL FAIL. When this input is closed, the unit will restart.
When initiating the test mode, if emergency stop is open, the LED on the RTRM will flash one time.
Fan Proving input, 5J7-6 on RTOM –
The indoor fan will run in the TEST MODE for 40 seconds and then stop if this input fails to open
(3-25 ton) or close (27.5-50 ton) within 40 seconds. The diagnostic for this failure is SERVICE (pulsing
1.5 – 2.5VDC from RTRM J6-6 to J6-10).
Compressor disable inputs, 3J1-8, 3J3-2 (2 compressor units) on RTRM
If this input is open, ie. 24VAC not present, that compressor circuit will not run during TEST MODE.
No diagnostic will be seen.
Compressor proving circuits, 3J1-9, 3J3-3 (2 compressor units) on RTRM
If this input is open when the contactor is energized by the RTRM, that circuit will not run during
TEST MODE. The diagnostic for this failure is COOL FAIL (pulsing 1.5 – 2.5VDC from RTRM J6-6 to
J6-8).
Gas heat failures, such as TCO, PS, FR
(see wiring diagram) will not be bypassed during TEST MODE. Diagnostics can be picked up at the
Ignition Control Module. Also, an additional diagnostic for this failure is HEAT FAIL (pulsing 1.5 –
2.5VDC from RTRM J6-6 to J6-7).
Ventilation Override mode (VOM), J6 on the RTOM
While in the test mode, if a VOM is activated, test mode will temporarily be halted. When the VOM
is terminated, the test mode will continue from where it was halted.
C0
2
Option through DCV Input on ECA
Test mode will operate normally with a CO
2
signal. When the economizer step is initiated, the CO
2
signal is overridden. When the test mode goes to the next step, the CO
2
signal is re-established. The
economizer will drive to the closed position and then proceed to drive open from the CO
2
signal.
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