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
81
Symptom
Corrective Action Cautions and Notes
- Motor rocks
slightly
w hen starting.
- This is normal start-up for
variable speed motor.
---- ---- ----
- No movement.
- Manual disconnect sw itch off or
door sw itch open.
- Blow n fuse or circuit breaker.
- 24 Vac w ires misw ired.
- Unseated pins in w iring
harness connectors.
- Bad motor/control module.
- Moisture present in motor or control module.
- Check 230 Vac pow er at motor.
- Check low voltage (24 Vac R to C) at motor.
- Check low voltage connections
(G, Y, W, R, C) at motor.
- Check for unseated pins in connectors
on motor harness.
- Test w ith a temporary jumper betw een R - G.
-
- Turn pow er OFF prior to repair.
Wait 5 minutes af ter
disconnecting pow er bef ore
opening motor.
- Handle electronic motor/control w ith care.
- Motor rocks,
but w on't start.
- Loose motor mount.
- Blow er w heel not tight on motor shaft.
- Bad motor/control module.
- Check for loose motor mount.
- Make sure blow er w heel is tight on shaf t.
- Perf orm motor/control replacement check,
ECM motors only.
- Turn pow er OFF prior to repair.
Wait 5 minutes af ter
disconnecting pow er bef ore
opening motor.
- Handle electronic motor/control w ith care.
- Motor
oscillates up &
dow n w hile
being tested
off of blow er.
- It is normal for motor to
oscillate w ith
no load on shaf t.
----
---- ----
- Varies up and dow n
or intermittent.
- Variation in 230 Vac to motor.
- Unseated pins in w iring harness
connectors.
- Erratic CFM command from
"BK" terminal.
- Improper thermostat connection or setting.
- Moisture present in motor/control module.
- Check line voltage for variation or "sag".
- Check low voltage connections
(G, Y, W, R, C) at
motor, unseated pins in motor
harness connectors.
- Check-out system controls - Thermostat.
- Perf orm Moisture Check.*
- Turn pow er OFF prior to repair.
- "Hunts" or "puff s" at
high CFM (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 filter.
- Check/correct duct restrictions.
- Adjust to correct blow er speed setting.
- Turn pow er OFF prior to repair.
- Motor w on't
start.
- Motor starts,
but runs
erratically.
- 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
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