Table 65: TEST input functionality without Y
Duration of connection (s) Control behavior with thermostat signals not present
< 2 No response
2 to 5
The control flashes sequentially on the STATUS LED the
series of stored error codes (up to the last five since active
error codes were last cleared) starting with the most
recent. If there are no error codes stored in memory, the
STATUS LED flashes three times (0.1 s ON / 0.1 s OFF).
> 5
The control immediately clears the stored error code
array, resets the 6 h PS timer and flashes the STATUS LED
six times (0.1 s ON / 0.1 s OFF) to indicate that the error
memory is clear.
Figure 20: Heat pump flow diagram
Installation Manual: R-410A Outdoor Split-System Heat Pump - YH2F, THF2, RHP150 Series 37
Johnson Controls Ducted Systems
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