Brownout Protection; Condensation Overflow - Bosch CA Installation, Operation And Maintenance Manual

Brownout Protection

8 | Console Model
BROWNOUT PROTECTION
The UPM controller will constantly monitor the power
supply, if the nominal voltage drops below 25% of its
value. (18 VAC approximately), the unit will enter
brownout protection mode. The compressor CC output
will be de-energized and the unit will enter the soft
lockout mode.
The controller will not monitor the power supply during
the first 500 milliseconds of compressor start up to avoid
noise and false alarms.
Once the UPM detects a brownout condition its fault LED
will flash five (5) times as error code indication.

CONDENSATION OVERFLOW

The UPM controller continuously monitors the drain pan
for high condensate water level, and to do so it utilizes a
sensor and identifies an alarm condition when the sensor
's impedance drops below 230KΩ +/- 15 % (ONLY when
condensate sensor option is present). Once the UPM
senses this resistance value it enters into a hard lockout
and reports the correspondent code via its status LED (4
flashes).
To exit the hard lockout water has to return to its normal
level the UPM has to be reset by removing the power from
the Y terminal (R if set on the DIP switch) the
compressors will be turned on after anti short cycle
expires.
970-293 (2014/06) Subject to change without prior notice CA Series