
QV Series Heat Pumps
QV Series Heat Pumps
8733829041 (2021/07)
30
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Safety Devices and the UPM Controller Overview
Subject to change without prior notice
Table 6 UPM Fault Blink Codes
Table 7 UPM Board Factory Default Settings
Table 8 UPM DIP Switch Selectable Positions
Blinks
Fault
Fault Criteria
None
None
All fault conditions normal
1
High
Pressure
Refrigerant discharge
pressure has exceeded 60
PSIG
2
Low
Pressure
Refrigerant suction
pressure has fallen below
40 PSIG
3
Water Coil
Freeze
Condition
Refrigerant temperature to
the water coil has fallen
below 26°F for 30 seconds
4
Condensate
Overflow
Condensate levels in the
unit drain pan are too high
5
Brown Out
Control voltage has fallen
below 18 VAC
6
Air Coil
Freeze
Condition
Refrigerant temperature to
the air coil has fallen below
26°F for 30 seconds
UPM Board Factory Default Settings
TEMP
26°F
LOCKOUT
2
RESET
Y
ALARM
PULSE
TEST
NO
UPM DIP SWITCH SELECTABLE POSTIONS
Lockout
4
2
Reset
R
Y
Alarm
Cont
Pulse
Test
Yes
No
OFF
12
3
4