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
82
- Connectors are oriented "down" (or as recommended by equipment manufacturer). - Arrange harnesses with "drip loop" under motor.
- Is condensate drain plugged? - Check for low airflow (too much latent capacity).
- Check for undercharged condition. - Check and plug leaks in return ducts, cabinet.
Using the wrong motor/control module voids all product warranties and may produce unexpected results.
You must use the correct replacement control/motor module since they are factory programmed for specific operating modes. Even though they look alike, different modules may have completely different
functionality. The ECM variable speed motors are c
Symptom
Corre ctive Action Cautions and Notes
- Stays at low CFM despite
system call for cool
or heat CFM.
- 24 Vac w ires misw ired or loose.
- "R" missing/not connected at motor.
- Fan in delay mode.
- Check low voltage (Thermostat)
w ires and connections.
- Verify f an is not in delay mode -
w ait until delay complete.
- Perf orm motor/control replacement
check, ECM motors only.
- Turn pow er OFF prior to repair.
Wait 5 minutes after
disconnecting pow er bef ore
opening motor.
- Handle electronic motor/control
w ith care.
- Stays at high CFM.
- "R" missing/not connected at motor.
- Fan in delay mode.
- Is fan in delay mode? - w ait until delay time
complete.
- Perf orm motor/control replacement check, ECM
motors only.
- Turn pow er OFF prior to repair.
Wait 5 minutes after
disconnecting pow er bef ore
opening motor.
- Handle electronic motor/control
w ith care.
- Blow er w on't shut of f.
- Current leakage f rom controls
into G, Y, or W.
- Check for Triac sw itched t'stat
or solid state relay.
- Turn pow er OFF prior to repair.
- Air noise.
- High static creating high blow er speed.
- Incorrect supply or return ductw ork.
- Incorrect or dirty filter(s).
- Incorrect blow er speed setting.
- Check/replace f ilter.
- Check/correct duct restrictions.
- Adjust to correct blow er speed setting.
- Turn pow er OFF prior to repair.
- Noisy blow er or cabinet.
- Loose blow er housing, panels, etc.
- High static creating high blow er
speed.
- Air leaks in ductw ork, cabinets,
or panels.
- Check for loose blow er housing,
panels, etc.
- Check for air w histling thru seams in
ducts, cabinets or panels.
- Check for cabinet/duct deformation.
- Turn pow er OFF prior to repair.
- "Hunts" or "puf fs" at
high CFM (speed).
- High static creating high blow er speed.
- Incorrect or dirty filter(s).
- Incorrect supply or return ductw ork.
- Incorrect blow er speed setting.
- Does removing panel or filter
reduce "puffing"?
- Check/replace f ilter.
- Check/correct duct restrictions.
- Adjust to correct blow er speed setting.
- Turn pow er OFF prior to repair.
- Evidence of
Moisture.
- Motor f ailure or
malf unction has
occurred and moisture
is present.
- Moisture in motor/control module.
- Replace motor and perf orm
Moisture Check.*
- Turn pow er OFF prior to repair.
Wait 5 minutes after
disconnecting pow er bef ore
opening motor.
- Handle electronic motor/control
w ith care.
- Excessive
noise.
- Motor starts,
but runs
erratically.
CHART CONTINUED FROM PREVIOUS PAGE.