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Cancel LVM Emergency Stop
An emergency stop command can be sent from the LVM centralized controller to the outdoor unit. Select 1 to
cancel the emergency stop command. The outdoor unit will display 0A0 during forced stop.
Test Operation
The system can be forced into cooling or heating mode for performance testing. Select 1 for forced cooling
test and select 2 for forced heating test.
Forced Cooling.
•
Forced Cooling will override and disable all controllers restricting end-user(s) operation, this is to include
centralized controllers as well for a period of 60 minutes.
•
Compressor frequency, fan speeds, and EXV positions will be elevated and will operate semi-indepen
-
dently from refrigerant pressures and temperatures.
•
Cooling and heating capacity demands will not be observed during this period.
•
Indoor units are in the cooling mode and fans are ON.
Forced Heating
•
Forced Heating will override and disable all controllers restricting end-user(s) operation, this is to include
centralized controllers as well.
•
Compressor frequency, fan speeds, and EXV positions will be elevated and will operate semi-indepen
-
dently from refrigerant pressures and temperatures.
•
Similar to Forced Cooling Operation, the system will enter cooling mode however the high pressure gas
line on heat recovery systems will double as a vapor return. In all cases the Compressor(s) operation will
be elevated to higher frequencies.
•
Cooling and heating capacity demands will not be observed during this period.
Auto Priority
If the heat pump mode priority setting (SW3) is set to outdoor ambient. Select 1 to make 60° F the outdoor
ambient change over temperature and select 2 to make 70° F the outdoor ambient change over temperature.
Compressor Lockout Temperature
If an alternate heat source is used, set the temperature at which the compressor will turn off.
Indoor Unit Temperature Unit
Set the indoor unit temperature unit display for indoor units and controllers. Fahrenheit or Celsius. This can
be overwritten by the indoor unit’s local controller.
Summary of Contents for VPB H4-3P Series
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