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
101 PB
Troubleshooting
Symptom Remedy
No display Check for 24 VAC at thermostat; display is blank when 24
VAC is not present.
All thermostat buttons are
inoperative
No response with first button
press
Verify 24 VAC is present; unit locks out when 24 VAC is not
present
First button press activates backlight only
Thermostat turns on and o too
frequently
Adjust temperature dierential (see Configuration Mode
Settings 3 & 4)
Fan runs continuously Press FAN (right) button to turn fan o
Room temperature is not
correct
Heat or Cool not coming on
Calibrate thermostat (see Configuration Mode Setting 10)
HEAT blinking
Verify wiring is correct, gently pull on each wire to verify
there is a good connection at terminal block
In heat set point screen, this is normal operation
COOL blinking In cool set point screen, this is normal operation
Not following program schedule
“PROG” on display
Verify time is correct, check am/pm, verify it is in program
mode (PROG displays)
Press both SYS (left) and Fan (right) to enter or exit the
program mode
Problem not listed above Press Reset button once*
* Reset Button Function :
Display is refreshed, configuration settings are unchanged.
Testing the Thermostat
Once the thermostat is configured, it should be thoroughly tested.
CAUTION!
:
Do not energize the air conditioning system when the outdoor temperature is
Heat Test
below 50 degrees. It can result in equipment damage or personal injury.
1. Press SYS (left) button until heat mode is displayed.
2. Adjust the set temperature so it is 5 degrees above the room temperature.
3. Heat should come on within a few seconds.
4. Adjust the set temperature 2 degrees below the room temperature and the
heat should turn o. There may be a fan delay on your system.
Note:
For heat pumps, there is a four-minute delay to protect your compressor after it turns o.
To bypass the compressor time delay, go to OFF mode for 5 seconds.
Cool Test
compressor time delay, go to OFF mode for 5 seconds.
1. Press SYS (left) button until cool mode is displayed.
2. Adjust set temperature so it is 5 degrees below room temperature.
3. A/C should come on within a few seconds.
4. Adjust the set temperature 2 degrees above the room temperature and
the A/C should turn o. There may be a fan delay on your system.
Note:
There is a four-minute time delay to protect the compressor after it turns o. To bypass the
Fan Test
1. Press FAN (right) button. Fan displays. Indoor fan turns ON.
2. Press FAN (right) button. Indoor fan turns OFF.
AVAILABLE ACCESSORIES
Thermostat - Rt6p