Bosch LM Series - Page 17

Sequence of Operation | 17LM Series Heat Pump
8 733 905 315 (2013/9)Revised 09-13
Figure # 14
UPM Sequence of Operation (SOO) Flow Chart
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Y1=1
V
>
18VAC
HPC = 1
LPC = 1
FRZ
> TEMP
LIM
CON
> 0
INITIAL
POWER UP
T
>
ASC OR
RS SEC
TIME
> 30
SEC
TIME
> 120
SEC
COUNT = 2
Start Timer
Start Timer
CC Output = On
CC Output = Off
Blink Code On Status LED
Report Alarm Fault
Hard Lockout
ALR Output = On/Pulse
Blink Code On Status LED
Soft Lockout
Record Alarm
Start Counter (If Applicable)
Start
Anti Short Cycle
Start
Random Start Up
Lockout Can Be Set To
4 Via Dip Switch
Power/Switchs/Sensor
Status Check
LEGEND:
HPC - HIGH PRESSURE CUTOUT
LPC - LOW PRESSURE CUTOUT
FRZ - FREEZE PROTECTION CONDITION
CON - CONDENSATE OVERFLOW CONDITION
CC - COMPRESSOR COIL
ASC - ANTI SHORT CYCLE
RS - RANDDOM START