Fault Code/Error Message
Description
Possible Fix
RTOS Fault 2
Software fault
Contact IBC Technical
Support for software upgrade.
Table 17
Warnings and error messages shown on the air handler unit app
6.3 Measuring voltage on AHU boards
The control voltage transformer is not bonded to the AHU cabinet. When measuring the voltage
supplied to the individual control circuit, you must reference the common post of the circuit. If you
measure to ground or to another common terminal, misleading readings of approximately 14V will
occur.
To test for nominal 24V, reference the adjacent COM connection. For example, to test voltage at
Compressor S1 terminal, measure for VAC between Compressor COM and Compressor S1 and
do
not
reference the Thermostat COM terminal.
6.4 Pump not energized
If the pump is not energizing:
In the
IBCconnect
app, go to
Advanced Settings
, and check that
Pump Enabled
is set to
"on".
In the
IBCconnect
app, go to
Basic Settings
, and check that
Heat Mode
is not set to "Heat
Pump": During Stage 1 heat pump heating, the AHU pump is not energized by design, to
avoid interfering with circulation through the heat pump. AHU pump is energized at Stage 2
call for heat.
Check the AHU board for blown pump fuse—the only fuse rated for 10A. See
.
6.5 Troubleshooting the IBCconnect app
6.5.1 Unstable WiFi connection
If the IBCconnect app is unable to maintain a connection to the IBC AHU WiFi, the IBCConnect
app footer will show an "X" icon above WiFi. It is likely the device is attempting to perform uploads
in the background. To prevent cell phone data and WiFi conflict:
1. Remove the IBC AHU WiFi connection from the device.
2. Go to the device’s
WiFi Setting
.
3. Press and hold the IBC-AHU-xxxxx entry.
4. Tap
Forget Network
.
5. Place the device in "Airplane Mode".
6. Reconnect the device to the IBC AHU WiFi by selecting the "IBC-AHU-xxxxx" from the list
84
Section: Find troubleshooting for IBC Technologies' air handling appliances.
Summary of Contents for AHU 800
Page 44: ...5 Set Tankless Mode to Off 6 Tap SAVE 42 Section Installation...
Page 53: ...5 Set Tankless Mode to On 6 Tap SAVE 51...
Page 55: ...5 Set Tankless Mode to On 6 Tap SAVE 53...
Page 57: ...7 Set FA Damper Open T F to lowest Fresh Air temperature 8 Tap SAVE 55...
Page 58: ...This page is intentionally left blank...
Page 60: ...This page is intentionally left blank...
Page 74: ...This page is intentionally left blank...
Page 88: ...7 Air handling appliance parts diagram 86 Section Air handling appliance parts diagram...
Page 90: ...88 Section Air handling appliance parts diagram...