Service Test Mode; Service Test Timeout; Leaving Service Test Mode; Service Test Mode - Cvzt, Vvzt, And Vvda - Trane Symbio 700 Controller 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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Timer Initiate: 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
OR until the user chooses a different Service Test State Request.
Timer Terminate: 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.
Timer Reset: 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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Service Test Mode — CVZT, VVZT, and VVDA
The table below provides unit operation for each stage of service test depending on the unit
configuration. The table describes the service test mode states and expected unit response. For all
service test mode operations, "IN CONTROL" refers to Symbio™ 700 algorithms controlling the unit. For
instance, in all service test mode states, the condenser Ffan will be controlled as needed to ensure safe
unit operation.
ACC-APG002A-EN
Minimum value— 1 minute
Maximum value— 120 minute
Default value— 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.
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