Service Test Mode; Service Test Timeout; Leaving Service Test Mode; Constant Volume Supply Fan Service Test Mode - Trane Symbio 700 Application Manual

Service Test Mode

Service Test Mode can be used to initiate certain operating modes of the equipment. Refer to the
following sections for more details associated with this feature.

Service Test Timeout

Service Test Timeout (Minute) is a user selected time value. Once Service Test Mode has been
initiated, and this timer expires, the controls are forced to leave Service Test Mode and return to
normal unit operation.
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T T i i m m e e r r I I n n i i t t i i a a t t e e : When any value for Service Test State Request is chosen other than Inactive, the
controller sets the Service Test Timeout to the user selected value and the unit begins to operate
as described in the tables below. It continues in operation until the Service Test Timeout Timer
reaches 0 O O R R until the user chooses a different Service Test State Request.
T T i i m m e e r r T T e e r r m m i i n n a a t t e e : if the Service Test Timeout timer has reached 0, the controls sets the Service
Test Stage Request to Inactive and the unit returns to normal unit operation. If the Service Test
Timeout Timer has not reached 0, the user can set the Service Test Stage Request to Inactive to
exit the active Service Test State Request and return to normal unit operation.
T T i i m m e e r r R R e e s s e e t t : if the Service Test Timeout timer has not reached 0, the user can select the Service
Test Stage Request to any value other than Inactive. The controller resets the Service Test
Timeout Timer to the user selected value and the unit operates as describe in the tables below for
the new request.

Leaving Service Test Mode

There are three ways to leave Service Test Mode:
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Constant Volume Supply Fan Service Test Mode

The tables below provide unit operation for each stage of service test depending on the unit
configuration.
The tables describe the service test mode states and expected unit response. For all service test
mode operation, "IN CONTROL" refers to Symbio 700 control algorithms controlling the unit. For
instance, in all service test mode states, the Condenser Fan will be controlled as needed to
ensure safe unit operation.
Table 4. Cooling Only
Service Test
Service Test Supply Fan
State #
State Request
1 Inactive IN CONTROL
2 Fan On
3 Cool 1
4 Cool 2
5 Heat 1
6 Heat 2
7 Heat 3
ACC-APG001A-EN
M M i i n n i i m m u u m m v v a a l l u u e e — 1 minute
M M a a x x i i m m u u m m v v a a l l u u e e — 120 minute
D D e e f f a a u u l l t t v v a a l l u u e e — 60 minutes
When the Service Test Timeout timer expires, the unit will leave Service Test Mode.
Service Test State Request is set to "Inactive".
The controller goes through a power cycle or reset.
Service Test
Compressor
On/Off Cool Stage
1,2
Request Request
IN CONTROL
ON 0
ON 1
ON 2
ON 0
ON 0
ON 0
Service Test Service Test
Auxiliary Condenser
Heat Stage Fan Stage
3 4
Request Request
IN CONTROL IN CONTROL
0 IN CONTROL
0 IN CONTROL
0 IN CONTROL
1 IN CONTROL
2 IN CONTROL
3 IN CONTROL
Heat Cool
Mode Status
IN CONTROL
TEST
TEST
TEST
TEST
TEST
TEST
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