Bosch QV Series Installation, Operation And Maintenance Manual page 30

30 | Safety Devices and the UPM Controller Overview
Blinks Fault
None None
High
1
Pressure
2 Low
Pressure
3 Water Coil
Freeze
Condition
4 Condensate
Overflow
5 Brown Out
6 Air Coil
Freeze
Condition
Table 6 UPM Fault Blink Codes
UPM Board Factory Default Settings
TEMP
LOCKOUT
RESET
ALARM
TEST
Table 7 UPM Board Factory Default Settings
UPM DIP SWITCH SELECTABLE POSTIONS
Lockout
Reset
Alarm
Test
Table 8 UPM DIP Switch Selectable Positions
8733829041 (2021/07)
Fault Criteria
All fault conditions normal
Refrigerant discharge
pressure has exceeded 60
PSIG
Refrigerant suction
pressure has fallen below
40 PSIG
Refrigerant temperature to
the water coil has fallen
below 26°F for 30 seconds
Condensate levels in the
unit drain pan are too high
Control voltage has fallen
below 18 VAC
Refrigerant temperature to
the air coil has fallen below
26°F for 30 seconds
26°F
2
Y
PULSE
NO
4 2
R Y
Cont Pulse
Yes No
Subject to change without prior notice
QV Series Heat Pumps
QV Series Heat Pumps