Upm Sequence Of Operation - Bosch EP Series Installation And Maintenance Manual

14 | UPM SequenCE of Operation

UPM SEQUENCE OF OPERATION
START
Y1 = ON
YES
POWER/ SWITCHES/SENSOR
STATUS CHECK
V > 18VAC
YES
HPC =
CLOSED
YES
LPC
=CLOSED
YES
FRZ >TEMP
LIMIT
YES
CON > 0
YES
INITIAL
POWER UP
YES
8733953041 (2019/01)
RESET ON
Y
NO
YES
CLEAR FAULTS
NO
START COUNTER (IF APPLICABLE)
NO
TIME > 120
START
SEC
TIMER
NO
NO
TIME > 30
START
SEC
TIMER
NO
NO
NO
START
ANTI SHORT CYCLE
NO
START
RANDOM START UP
Figure # 17 UPM Sequence of Operation
Subject to change without prior notice
RESET ON R
R = 24VAC
NO
NO
BLINK CODE ON STATUS LED
SOFT LOCKOUT
RECORD ALARM
LOCKOUT CAN BE SET
TO 4 VIA DIP SWITCH
BLINK CODE
ON STATUS LED
YES
YES
NO
YES
T > ASC OR
RS SEC
LEGEND:
HPC - HIGH PRESSURE CUTOUT
LPC - LOW PRESSURE CUTOUT
FRZ - FREEZE PROTECTION CONDITION
CON - CONDENSATE OVERFLOW CONDITION
CC - COMPRESSOR COIL
ASC - ANTI SHORT CYCLE
YES
COUNTER
NEEDED?
NO
YES
COUNT = 2
OR
COUNT = 4
NO
YES
NO
HARD
LOCKOUT?
YES
BLINK CODE ON STATUS LED
DISPLAY OUTPUT = PULSE
ALR OUTPUT = ON/PULSE
CC OUTPUT = OFF
CC OUTPUT = ON
EP Series
EP Series