Troubleshooting; Diagnosing A Problem; Diagnostic Codes - Vent-Axia Sentinel Installation Operation & Maintenance

Troubleshooting

Troubleshooting

Diagnosing a Problem

In the event of a problem, always troubleshoot the unit according to:
Diagnostic code displayed on the Commissioning Interface.
Fault LED on the Commissioning Interface and cable entry panel.
Check fuses on the Main Controller PCB.
If no indications are displayed, then troubleshoot problem according to the fault symptom as described in the
following tables.

Diagnostic Codes

A diagnostic code screen is displayed on the Commissioning Interface in the event that a fault has occurred
which resulted in the unit operation being stopped and placed into standby.
SENTINEL HR
DIAGNOSTIC
The following diagnostic codes may be viewed on the Commissioning Interface.
Table 8: Diagnostic Codes
Problem
Thermistors
Pump float switch open
Fan 1 extract relay open
Fan 2 intake relay open
24 V sensor supply fuse
blown
Pressure sensor in CP mode
Commissioning Interface but
no data from HR
58
---
Code Description
1-255 T1 T2
+1 +2
+16 +32
Thermistors are checked continuously and one or more has to be at fault for 60
seconds before triggering this diagnostic stop.
300 Pump float switch is checked continuously and has to be open (i.e. fault or
excess condensate) for 120 seconds before triggering this diagnostic stop. If
the unit is 'Off' then pump mains is turned on after 30 seconds to try to reduce
the water level.
310 Fan relays are checked when HR is ON, either relay has to be open for 60
seconds before triggering this diagnostic stop. This is a NC relay on board the
motor itself. It goes open when motor detect fault.
320
Fan relays are checked when HR is ON, either relay has to be open for 60
seconds before triggering this diagnostic stop. This is a NC relay on board the
motor itself. It goes open when motor detect fault.
330 24 V sensor supply fuse is checked when the unit is switched on and has to be
open for 10 seconds before triggering this diagnostic stop.
340
Pressure sensor is checked when HR is ON and in CP mode. The sensor
signal has to be below the CP preset threshold ( value from factory test ) whilst
the fan speed is greater than 50% for 60 seconds before triggering this
diagnostic stop.
360 A 360 code indicates power to the remote control but no data, a wiring fault or
failure on the heat recovery board.
T3 T4
+4 +8 = Short Circuit
+64 +128 = Open Circuit
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance