Trane Symbio 700 Controller - Staged Gas Heat Fault

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ACC-APG002A-EN
Failure Failure Detection
Symbio 700 Response Response Type
Diagnostic: ERM Supply Fan
Power Mod Overheated - 2
The Rectifier thermocouple
has reached a too-high
temperature. (Motor Manual
Reset)
• Diagnostic: ERM Supply
Fan Power Mod
Overheated – 2 will be
set to “Active”
• All unit functions will be
shut down immediately
Auto Reset
Supply Fan 1 Communication
Status is “Not
Communicating”
If continual loss of
communication between the
controller and the Supply Fan
1 ERM has occurred for a 30-
second period, this failure will
be detected and the controller
will take action.
All unit functions will be shut
down
Auto Reset
Supply Fan 1 Communication
Status is “Not
Communicating”
If continual loss of
communication between the
controller and the Supply Fan
2 ERM has occurred for a 30-
second period, this failure will
be detected and the controller
will take action.
All unit functions will be shut
down
Auto Reset
Diagnostic: ERM Fault Supply
Fan - 1
ERM Fault. Numerous drive
faults can cause this general
fault. Reference the EBM-
PAPST Installation and
Operating manual for a list of
fault codes and descriptions.
(Clears on Reset)
• Diagnostic: ERM Fault
Supply Fan – 1 will be
set to “Active“
• All unit functions will be
shut down
Auto Reset
Diagnostic: ERM Fault Supply
Fan - 2
ERM Fault. Numerous drive
faults can cause this general
fault. Reference the EBM-
PAPST Installation and
Operating manual for a list of
fault codes and descriptions.
(Clears on Reset)
• Diagnostic: ERM Fault
Supply Fan – 1 will be
set to “Active“
• All unit functions will be
shut down
Auto Reset
Staged Gas Heat Fault
The following diagnostics are derived from data monitoring via Modbus™ ignition controller, or through a
combination of data monitoring and additional failure criteria.
Fault Fault Detection Symbio 700 Response Response
Type
Diagnostic: Heat Failure
Active when certain
diagnostics below.
Status Only
Auto Reset
Diagnostic: IGN1 Module
Lockout
• Monitored directly from
Modbus.
• Active when any lockout
is active on the IGN 1
controller
• All heating operation is terminated/
disabled
• Diagnostic: Heat Failure set to Active
Auto Reset
Diagnostic: IGN1 Heating
High Temp Limit Open
Gas Heat Ignition Module via
Modbus
Status Only (Ignition Module Lockout)
Auto Reset
Diagnostic: IGN1 Flame
Rollout Switch Open
Gas Heat Ignition Module via
Modbus
Status Only (Ignition Module Lockout)
Auto Reset
Diagnostic: IGN1 Inducer
Proving Switch Fail Closed
Gas Heat Ignition Module via
Modbus
Status Only (Ignition Module Lockout)
Auto Reset
Diagnostic: IGN1 Inducer
Proving Switch Fail Open
Gas Heat Ignition Module via
Modbus
Status Only (Ignition Module Lockout)
Auto Reset
Diagnostic: IGN1 No Flame
Sensed on Ignition
Gas Heat Ignition Module via
Modbus
Status Only (Ignition Module Lockout)
Auto Reset
Troubleshooting