ASPT Service Manual
Table Of Contents
- IMPORTANT INFORMATION
- PRODUCT IDENTIFICATION
- Checking Voltage
- Checking Wiring
- Checking Thermostat And Wiring
- Thermostat Wiring
- Checking Transformer And Control Circuit
- Checking Contactor And/Or Relays
- Checking Contactor Contacts
- Checking Fan Relay Contacts
- Checking Loss Of Charge Protector (Heat Pump Models)
- Checking High Pressure Control
- Checking Low Pressure Control
- Copeland Comfort Alert™ Diagnostics - 3-Wire module
- Copeland Coresense™ Diagnostics - 3-Wire module
- Checking Capacitor
- Resistance Check Using A Digital Multi-Meter
- Capacitance Check Using A Digital Multi-Meter (In Capacitance Mode)
- Testing a Run Capacitor Under Load
- Checking Outdoor Fan and Blower Motors (PSC Motors)
- Checking Fan and Blower Motor (ECM Motors)
- Checking ECM Motor Windings
- ECM CFM Adjustments MBE/AEPF
- Blower Performance Data
- Checking High Efficiency Motors
- EEM Blower Replacement
- MBR/AR*F Electronic Blower Time Delay Relay
- Checking Compressor
- Resistance Test
- Ground Test
- Unloader Test Procedure
- Operation Test
- Checking 3-Phase Scroll Compressor Rotation
- Testing Crankcase Heater (Optional Item)
- Checking Reversing Valve and Solenoid
- Testing Defrost Control
- Testing Defrost Thermostat
- Checking Heater Limit Control(s)
- Checking Heater Elements
- Electric Heater (Optional Item)
- Checking Heater Limit Control(s)
- Checking Heater Elements
- Refrigeration Repair Practice
- Leak Testing (Nitrogen or Nitrogen-Traced)
- Evacuation
- Charging
- Checking Compressor Efficiency
- Overfeeding
- Underfeeding
- Checking Superheat
- Subcooling on Expansion Valve System
- Checking Expansion Valve Operation
- Checking Restricted Liquid Line
- Overcharge Of Refrigerant
- Non-Condensables
- Compressor Burnout
- Refrigerant Piping
- Duct Static Pressures
- Single Piece Air Handler External Static
- Two Piece Air Handler External Static Pressure
- Furnace External Static Pressure
- Periodic Maintenance
SERVICING
70
5. Apply power to unit and set thermostat to cool and set for
a call for cool.
6. Low pressure switch should open at 21 PSIG, and auto
reset (close) at approximately 50 PSIG.
7. If low pressure switch does not operate in these parameters
replace switch.
Test 2. Testing Low Pressure Control in Heating Mode
1. Connect refrigerant gages to unit.
2. Disconnect power to outdoor unit.
3. Remove control panel cover.
4. Disconnect black wire from condenser fan motor (single
stage units) or remove plug from control board on 2 stage
units. Note: Tape or isolate black wire to prevent possible
short.
5. Apply power to unit and set thermostat to cool and set for
all for cool.
6. Low pressure switch should open at 21 PSIG and auto
reset (close) at approximately 50 PSIG
7. If low pressure switch does not operate in these parameters
replace switch.
Copeland Comfort Alert™ Diagnostics - 3-Wire module
Applies to ASX /ASZ and DSX/DSZ units
WARNING
Comfort Alert™ is self-contained with no required external
sensors and is designed to install directly into the electrical
box of any residential condensing unit that has a Copeland
Scroll™ compressor inside.
Once attached, Comfort Alert provides around-the-clock
monitoring for common electrical problems, compressor
defects and broad system faults. If a glitch is detected, an
LED indicator ashes the proper alert codes to help you
quickly pinpoint the problem. (See Diagnostic Table: 3-Wire
Comfort Alert Module on previous page.)
Schematic Abbreviation Descriptions
HTCO High Temperature Cut Out Switch
HPCO High Pressure Cut Out Switch
LPCO Low Pressure Cut Out Switch
CC Compressor Contactor
ECB Electronic Control Board
(Defrost or Time Delay)
ECB
CC
HTCO
LPCO
HPCO
Comfort Alert
Diagnostics Module
Bold line shows field
installed wiring
Dashed line shows thermostat
demand wiring in system without
HTCO, HPCO, CPCO, and ECB
LOGIC
R
C
Y
Y1
R
C
Wiring Schematic - 3-Wire Comfort Alert Module
Copeland Coresense™ Diagnostics - 3-Wire module
Applies to ASX /ASZ and DSX/DSZ units
WARNING
The CoreSense™ module is self-contained with no
required external sensors and works with any residential
condensing unit that has a Copeland Scroll™ compressor
inside.