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
72
Status LED Status LED Description
Module has power Supply voltage is present at module terminals
Thermostat demand signal 1. Compressor protector is open
Y1 is present, but the 2. Outdoor unit power disconnect is open
compressor is not 3. Compressor circuit breaker or fuse(s) is open
running 4. Broken wire or connector is not making contact
5. Low pressure switch open if present in system
6. Compressor contactor has failed open
Long Run Time 1. Low refrigerant charge
Flash Code 1 Compressor is 2. Evaporator blower is not running
running extremely 3. Evaporator coil is frozen
long run cycles 4. Faulty metering device
5. Condenser coil is dirty
6. Liquid line restriction (filter drier blocked if present in system)
7. Thermostat is malfunctioning
S yste m P re ssu re T ri p 1. High head pressure
Flash Code 2 Discharge or suction 2. Condenser coil poor air circulation (dirty, blocked, damaged)
pressure out of limits or 3. Condenser fan is not running
compressor overloaded 4. Return air duct has substantial leakage
5. If low pressure switch present in system,
check Flash Code 1 information
Short Cycling 1. Thermostat demand signal is intermittent
Flash Code 3 Compressor is running 2. Time delay relay or control board defective
only briefly 3. If high pressure switch present go to Flash Code 2 information
4. If low pressure switch present go to Flash Code 1 information
1. Run capacitor has failed
Flash Code 4 2. Low line voltage (contact utility if voltage at disconnect is low)
3. Excessive liquid refrigerant in compressor
4. Compressor bearings are seized
Open Circuit 1. Outdoor unit power disconnect is open
Flash Code 5 2. Compressor circuit breaker or fuse(s) is open
3. Compressor contactor has failed open
4. High pressure switch is open and requires manual reset
5. Open circuit in compressor supply wiring or connections
6. Unusually long compressor protector reset time
due to extreme ambient temperature
7. Compressor windings are damaged
Open Start Circuit 1. Run capacitor has failed
Flash Code 6 Current only in run circuit 2. Open circuit in compressor start wiring or connections
3. Compressor start winding is damaged
Open Run Circuit 1. Open circuit in compressor run wiring or connections
Flash Code 7 Current only in start circuit 2. Compressor run winding is damaged
Low Voltage 1. Control circuit transformer is overloaded
Flash Code 9 Control circuit < 17VAC 2. Low line voltage (contact utility if voltage at disconnect is low)
• FLASH CODE NUMBER CORRESPONDS TO A NUMBER OF LED FLASHES, FOLLOWED BY A PAUSE AND THEN REPEATED
• TRIP AND ALERT LEDS FLASHING AT SAME TIME MEANS CONTROL CIRCUIT VOLTAGE IS TOO LOW FOR OPERATION.
• LAST ALERT FLASH CODE IS DISPLAYED FOR 1 MINUTE AFTER MODULE IS POWERED ON.