McQuay MicroTech 200 Series

44 OM 200MICRO
Problems, continued
PROBLEM CONDITION DISPLAY ACTION CLEAR
Evaporator Freeze
Protect
Evaporator Refrigerant
Temperature <
Evaporator Freeze
Protect Set Point (34°F)
Evap Pres Lo-Freeze
Start the Evaporator
pump
Evaporator Refrigerant
Temperature >
Evaporator Freeze
Protect Set Point +
Differential (2°F)
Evaporator Pump 1 Fail
UnitStatus >
EvapPmpOn_Recirc and
UnitStatus <
EvapPumpsOff and
Evaporator Water Flow
switch digital input in No
Flow position for more
then 3 seconds
(adjustable) and
Evaporator pump 2 is
present and Evaporator
pump 2 has not yet
failed
Evap Pump #1 Fail
Unit will try to start
evaporator pump 2
Manual
Evaporator Pump 2 Fail
UnitStatus >
EvapPmpOn_Recirc and
UnitStatus <
EvapPumpsOff and
Evaporator Water Flow
switch digital input in No
Flow position for more
then 3 seconds
(adjustable) and
Evaporator pump 1 is
present and Evaporator
pump 1 has not yet
failed
Evap Pump #2 Fail
Unit will try to start
evaporator pump 1
Manual
Condenser Pump 1 Fail
UnitStatus >
CondPmpOn_WaitingFo
r Flow and UnitStatus <
CondPumpOff and
Condenser Water Flow
switch digital input in No
Flow position for more
then 3 seconds
(adjustable) and
Condenser pump 2 is
present and Condenser
pump 2 has not yet
failed
Cond Pump #1 Fail
Unit will try to start
condenser pump 2
Manual
Condenser Pump 2 Fail
UnitStatus >
CondPmpOn_WaitingFo
r Flow and UnitStatus <
CondPumpOff and
Condenser Water Flow
switch digital input in No
Flow position for more
then 3 seconds
(adjustable) and
Condenser pump 1 is
present and Condenser
pump 1 has not yet
failed
Cond Pump #2 Fail
Unit will try to start
condenser pump 1
Manual