124
PB
COMPONENT TESTING
Checking The Reversing Valve
WARNING
HIGH PRESSURE HAZARD
Sealed Refrigeration System contains refrigerant
and oil under high pressure.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Failure to follow these procedures could
result in serious injury or death.
NOTE: You must have normal operating pressures before the reversing valve can shift.
Check the operation of the valve by starting the system and switching the operation from “Cooling” to “Heating”
and then back to “Cooling”. Do not hammer on valve.
Occasionally, the reversing valve may stick in the heating or cooling position or in the mid-position.
When sluggish or stuck in the mid-position, part of the discharge gas from the compressor is directed back to the
suction side, resulting in excessively high suction pressure.
Should the valve fail to shift from coooling to heating, block the air flow through the outdoor coil and allow the
discharge pressure to build in the system. Then switch the system from heating to cooling.
If the valve is stuck in the heating position, block the air flow through the indoor coil and allow discharge pressure
to build in the system. Then switch the system from heating to cooling.
Should the valve fail to shift in either position after increasing the discharge pressure, replace the valve.
Dented or damaged valve body or capillary tubes can prevent the main slide in the valve body from shifting.
If you determing this is the problem, replace the reversing valve.
After all of the previous inspections and checks have been made and determined correct, then perform the
“Touch Test” on the reversing valve.
Reversing Valve in Heating Mode
Figure 602 (Reserving Valve)
Summary of Contents for VRP12K
Page 46: ...46 OPERATION Component Identification Indoor Coil 36k ...
Page 48: ...48 OPERATION Component Identification Outdoor Coil Monitored by 1 thermistor ...
Page 49: ...49 OPERATION Component Identification Outdoor Fan BLDC Variable Speed 600 1000 RPM ...
Page 53: ...53 OPERATION Component Identification 4 Way Reversing Valve 208 230v Reversing valve assembly ...
Page 177: ...177 UPDATING VRP FIRMWARE Or ...
Page 184: ...184 UPDATING VRP FIRMWARE Open zip file Copy to SD Card Insert into SD Card Slot ...
Page 193: ...193 UPDATING VRP FIRMWARE Retrieving VRP Data Remove SD Card from FMC and Locate DF Folder ...
Page 196: ...196 WIRINGDIAGRAMS 12 24K BTU 208 230V 7 5 10 0 KW Figure 801 Wiring Diagram ...
Page 197: ...197 WIRING DIAGRAMS 12 24K BTU 208 230V 2 5 3 4 5 0 KW Figure 802 Wiring Diagram ...
Page 198: ...198 WIRING DIAGRAMS 12 24K BTU 265V 2 5 3 4 5 0 kW Figure 803 Wiring Diagram ...
Page 199: ...199 WIRING DIAGRAMS 12 24K BTU 265V 7 5 10 kW Figure 804 Wiring Diagram ...
Page 200: ...200 WIRING DIAGRAMS 36K BTU 208 230V Figure 805 Wiring Diagram ...