Service and Parts Manual (2016, 2017, 2018, 2014, 2015, 2013, 2012)
Table Of Contents
- INTRODUCTION
- IMPORTANT SAFETY INFORMATION
- PERSONAL INJURY OR DEATH HAZARDS
- Operation of Equipment in During Construction
- Equipment Identification
- Model and Serial Number Location
- Model and Serial Number information is found on the Manufacturer’s DATA TAG, located on the front or top.
- Model Number Reference Guide
- SERIAL NUMBER REFERENCE GUIDE
- Chassis Specifications
- Small Chassis Dimensions
- Large Chassis Dimensions
- Electrical Data
- Electrical Requirements
- Electrical Ratings Table
- Supply Air Flow and Data
- ELECTRONIC CONTROL BOARD FEATURES
- Electronic Sequence of Operation
- Interface Connector Definitions
- Remote Wall Thermostat
- Remote Wall Thermostat Location
- Desk Control
- Auxiliary Fan Control
- Unit Heat Control Operation - Heat Pump With Electric Heat
- Refrigeration Sequence Of Operation
- Remove The Chassis
- Servicing / Chassis Quick Changeouts
- To Remove the Chassis from the Closet:
- Refrigerant Charging
- Undercharged Refrigerant Systems
- Overcharged Refrigerant Systems
- Restricted Refrigerant System
- Sealed System Method of Charging/ Repairs
- Checking External Static Pressure
- Explanation of charts
- Indoor Airflow Data
- Ductwork Preparation
- Fresh Air Door
- Checking Approximate Airflow
- Electric Heat Strips
- COMPONENT TESTING
- Hermetic Components Check
- Reversing Valve Description And Operation
- Testing The Reversing Valve Solenoid Coil
- Checking The Reversing Valve
- Touch Test Chart : To Service Reversing Valves
- Compressor Checks
- Compressor Replacement -Special Procedure in Case of Compressor Burnout
- Fan Motor
- Capacitors
- Heating Element and Limit Switch
- Drain Pan Valve
- Thermistor Resistence Values (This Table Applies to All Thermistors)
- Testing the Diagnostic Service Module
- Testing the Electronic Control Board
- ELECTRONIC CONTROL BOARD COMPONENTS IDENTIFICATION AND TESTING
- Error Codes and Alarm Status
- Electrical Troubleshooting Chart - Cooling
- 9K Btu, 12K Btu, & 18K Btu
- 24K Btu
- Electrical Troubleshooting Chart - Heat Pump
- Troubleshooting Chart - Cooling
- 9-18K VEA 208/230V
- 9-18K VHA 208/230V
- 9-18K VHA 265V
- 24K VEA 208/230V 2.5/3.4/5.0
- 24K VEA 208/230V 7.5/10.0
- 24K VHA 208/230V 2.5/3.4/5.0
- 24K VHA 208/230V 7.5/10
- 24K VHA 265V 2.5/3.4/5.0
- 24K VHA 265V 7.5/10.0
- VEA9K, VHA9K, VEA12K, VHA12K, VEA18K Figure 901
- AVAILABLE ACCESSORIES
- Thermostat - Rt6
- Thermostat - Rt6p
- Thermostat - WRT1
- Drain Pan
32 PB
R-410A SEALED SYSTEM REPAIRS
Restricted Refrigerant System
Troubleshooting a restricted refrigerant system can be difcult. The following procedures are the more common problems
and solutions to these problems. There are two types of refrigerant restrictions: Partial restrictions and complete restrictions.
A partial restriction allows some of the refrigerant to circulate through the system.
With a complete restriction there is no circulation of refrigerant in the system.
Restricted refrigerant systems display the same symptoms as a “low-charge condition.”
When the unit is shut off, or the compressor disengages, the gauges may equalize very slowly.
A quick check for either condition begins at the evaporator. With a partial restriction, there may be gurgling sounds at the
metering device entrance to the evaporator. The evaporator in a partial restriction could be partially frosted or have an ice ball
close to the entrance of the metering device. Frost may continue on the suction line back to the compressor.
Often a partial restriction of any type can be found by feel, as there is a temperature difference from one side of the restriction
to the other.
With a complete restriction, there will be no sound at the metering device entrance. An amperage check of the compressor
with a partial restriction may show normal current when compared to the unit speci cation. With a complete restriction the
current drawn may be considerably less than normal, as the compressor is running in a deep vacuum (no load.) Much of the
area of the condenser will be relatively cool since most or all of the liquid refrigerant will be stored there.
The following conditions are based primarily on a system in the cooling mode.
Figure 603 (Restricted System)