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– 21 –

  Reverse Cycle Defrosting Heat Pump Mode

Reverse Cycle Defrost shall be controlled as a 

function of compressor run time and outdoor coil 

temperature.

a) 

Defrost Enable

The reverse cycle defrost shall begin when 

either: 

1.  The outdoor coil temperature, as measured 

by the S4 thermistor during compressor 

operation is less than or equal to 14°F for 

at least 3 consecutive minutes.

-OR-

2.  The outdoor temperature as measured by  

the S3 Thermistor, is less than or equal 

to 42°F OR the outdoor coil temperature 

is less than or equal to 32°F for at least 3 

hours of accumulated compressor run time.

NOTE

: As described at step 1, if the outdoor 

coil temperature, as measured by the S4 

thermistor, rises above 14°F before 3 minutes 

has elapsed; the accumulated time register is 

reset to zero.  A defrost sequence will not be 

initiated, as a result.

NOTE

: As described in step 2, if the outdoor 

temperature, as measured by the S3 

thermistor, rises above 42°F AND the outdoor 

coil temperature as measured by the S4 

thermistor, rises above 42°F before 3 hours of 

compressor run time has been accumulated; 

the accumulated time register is reset to zero. 

A defrost sequence will not be initiated, as a 

result.

b) 

Defrost Operating Sequence

When either of these conditions are detected, 

the Zoneline will initiate a reverse cycle defrost.  

The following steps comprise the reverse cycle 

defrost: 

1.  Immediately stop heat pump operation.

2.  Run stage 3 heating until room 

temperature is satisfied.

3.  Wait for compressor off time (3 minutes) to 

be satisfied.

4.  Run reverse cycle defrost (cooling mode 

without fans) until either: 

•  the outdoor coil temperature rises to 68°F

•  or the total elapsed time of compressor run 

in reverse cycle defrost reaches 9 minutes

5.  Run a stage 3 heating cycle to satisfy room 

temperature.

6.  If reverse cycle defrost is exited due to

•  the outdoor coil rising above 68°F, resume 

normal heat pump operation

•  the total elapsed time exceeding 9 minutes 

and total number of defrost cycles is less 

than 5, go back to step 4 and run another 

defrost cycle.  If the total number of defrost 

cycles equals 5, see 

Abnormal Defrost 

Fault

 below

c) 

Abnormal Defrost Fault

If five consecutive defrost cycles have been 

completed and the outdoor coil has not 

reached 68°F, an Abnormal Defrost Fault will 

be initiated. Heat Pump operation is disabled 

while this fault is active.  The Zoneline will wait 

for the following conditions to be met.

1.  Elapsed time > 4.5 days

 and

2.  Outdoor Coil Thermistor > 42°F

 and

3.  Outdoor Ambient > 42°F

At this time, up to five more defrosts will be 

attempted.  If the outdoor coil thermistor stays 

below 68°F, it will reenter abnormal defrost 

fault.  If it increases above 68°F, it will resume 

normal heat pump operation.

Reverse cycle defrost has the highest priority.  

Once the defrost starts the defrost operation 

continues regardless of any temperature 

conditions and any kind of manual operation, 

except for changing the operation switch.

Reverse cycle defrost is used in Class 2 mode. 

During reverse cycle defrost, all Class 2 signal 

modes are overridden except when "Cooling" 

is called from the thermostat.

Summary of Contents for GE APPLIANCES AZ45E07DABW5

Page 1: ...PW5 AZ45E12DBMW5 AZ45E12DBMW6 AZ45E12DBMW7 AZ45E15DABW5 AZ45E15DABW6 AZ45E15DABW7 AZ45E15DACW5 AZ45E15DACW6 AZ45E15DACW7 AZ65H07DABW5 AZ65H07DACW5 AZ65H07DADW5 AZ65H07DBMW5 AZ65H09DABW5 AZ65H09DACW5 A...

Page 2: ...grounds of electrical electronic and mechanical experience Any attempt to repair a major appliance may result in personal injury and property damage The manufacturer or seller cannot be responsible fo...

Page 3: ...Cycle Operation 13 Fan Cycle Resistance Heating Mode 14 Fan Cycle Heat Pump Mode 15 Constant Fan 16 Random Restart 17 Freeze Prevention for Indoor Coil Cooling 19 Indoor Coil Overheat Protection 20 Re...

Page 4: ...32 Service Mode 34 Accessing Controls 35 Low Voltage Transformer 36 Service Main Board 37 User Interface 39 Air System 40 Fan Motors 40 Indoor Fan Motor 40 Indoor Blower Wheel 40 Indoor Fan Bearing 4...

Page 5: ...lve 51 Service Replacement Valve Assembly 52 Sealed System Refrigerant Flow Cooling 53 Sealed System Refrigerant Flow Heating 54 Recovery Process 55 Charging Summary 56 Refrigerant Charge 56 Schematic...

Page 6: ...oes for all repairs Step 1 Plan and Prepare Step 4 Apply LOTO device and lock Step 2 Shut down the appliance Step 5 Control discharge stored energy Step 3 Isolate the appliance Step 6 Try It verify th...

Page 7: ...em with the same condensing temperature of 120 F and 45 F evaporator saturation temperature will have a high side pressure of approximately 500 psi and a low side pressure of approximately 150 psi 5 1...

Page 8: ...ntrol 65 Deluxe Heat Pump Electronic Control Unit Type E Cooling with Electric Resistance Heat H Heat Pump with Electric Resistance Heat Universal Power Connection A These models use power cord kits h...

Page 9: ...and outdoor fan run AZ6500 In the cooling mode the compressor indoor fan and outdoor fan run the reversing valve is energized throughout the entire cooling cycle Heating AZ4500 In the heating mode AZ4...

Page 10: ...at the same time Upon initial start up or resumption after a power interruption Stage 3 Heater A and Heater B are energized at full power to generate heat until the room temperature rises to the temp...

Page 11: ...mperature control setpoint the heat pump operation will stop Stage 3 heating is activated based on power cord for all outdoor temperatures except for l2R lockout conditions Stage 3 will continue to op...

Page 12: ...nd Heat Pump modes remain off Boost Heat Mode AZ6500 Series ONLY When the Boost Heat Auxiliary Set button is enabled and the outdoor temperature is above 25 F the first stage heat heat pump only is lo...

Page 13: ...ds before the compressor and outdoor fan are turned on The indoor fan runs continuously for a short period of time approximately 30 seconds after the compressor and outdoor fan are turned OFF In the c...

Page 14: ...de the indoor fan will continue to operate for 6 seconds after the user has stopped the Zoneline in order to dissipate the heat inside the Zoneline In the heating mode the indoor fan is designed to op...

Page 15: ...ON The outdoor fan and the compressor are turned ON at the same time The indoor fan is then turned OFF 6 seconds after the compressor and outdoor fan are turned OFF FAN CYCLE HEAT PUMP MODE Fan Cycle...

Page 16: ...ol Any time a fan is energized the control checks that the fan reaches the target RPM speed 150 RPMs If the target cannot be met the fan motor will shut down for 15 minutes and will set a fault code I...

Page 17: ...second power outage of indefinite length The controls will revert to settings established prior to the outage The Random Restart function is effective in the Class 2 mode Random Restart for AZ4500 Se...

Page 18: ...ver a 3 to 20 seconds timing period Cool Mode Heat Mode Stop Mode Compressor Run Power Down Heat Pump Operation 3 mins Power Recovered Range Stop Fan Operation Quick Heat Recovery Compressor Run Power...

Page 19: ...nning again when the coil temperature reaches 50 F or above However the safety restarting function will prevent the compressor restarting if the minimum 3 minute shutdown time period has not elapsed T...

Page 20: ...perature is too high for heat pump operation The temperature of the indoor coil is monitored and if it rises above 131 F the control stops the outdoor fan The Zoneline will resume normal operation whe...

Page 21: ...ture is satisfied 3 Wait for compressor off time 3 minutes to be satisfied 4 Run reverse cycle defrost cooling mode without fans until either the outdoor coil temperature rises to 68 F or the total el...

Page 22: ...ne base pan into a collector tray positioned above the indoor coil That condensate will then drain from the tray onto the warm indoor coil where it will be evaporated into the room atmosphere If an ex...

Page 23: ...operating mode of the Zoneline While the Zoneline is operating in the desired mode press and hold the Display Show Hide button for 10 seconds to lock the control to this setting The display will then...

Page 24: ...enu allows the user to set up various configurations The display has a number 0 in the left digit and the setting in the right digit The heat and cool LED s are also used On entry the display shows AU...

Page 25: ...tions provide 24 VAC to energize a remote relay The RAKCDC accessory must be used when using an external fan The Remote Thermostat Connectors are included with each Zoneline If required order a replac...

Page 26: ...coil to sample the incoming room air The indoor coil thermistor is mounted on the right side of the coil in a copper well to sample the coil temperature Indoor Thermistor Resistance ohms All Zoneline...

Page 27: ...ed relays for the selected cycle The main board also has a DC power supply to provide the needed DC voltage to run the indoor and outdoor fan motors Personality is programmed into the board at the tim...

Page 28: ...and 30 amp cords will have a separate heater enabling jumper that plugs into the main board which limits the heater wattage according to house supply limitations If this jumper is not connected the he...

Page 29: ...ft portion of the main board Indoor Thermistors RJ 45 A RJ 45 connector is mounted to the front of the main control board next to the red auxiliary set button of the main board to provide a way to eas...

Page 30: ...r DLB Relay J305 ICR Pump J304 Reversing Valve Coil AC Input plug J101 voltage select jumper Jumper between 1 and 2 230V Jumper between 1 and 3 265V This jumper provide voltage to 24 VAC transformer a...

Page 31: ...Fan Motor J103 pin 1 2 Blue to Yellow J103 pin 3 4 White to Black 38 5k ohms approximately J103 pin 3 6 White to Red J103 pin 4 6 Black to Red Outdoor Fan Motor J104 pin 1 2 Blue to Yellow J104 pin 3...

Page 32: ...Applied signal is not valid and has been constant for 30 seconds No external control of fans heat or cooling Internal control operation only Clears once a valid signal is received F4 Indoor thermisto...

Page 33: ...d Maku Up air module F17 Outlet thermistor failure Fault clears when thermistor reads value other than short circuit or open circuit No resistance heating available F18 Outlet temperature overheat The...

Page 34: ...ter Zoneline has been in this mode for 10 seconds 7 S5 8 UI UI Test Run the LED test sequence 9 So Software version is displayed AZ6500 1 CL Cooling Compressor Indoor Fan reversing valve and Outdoor f...

Page 35: ...r The capacitor assists the compressor starting and lowers the running current WARNING Move the protective shield and discharge the capacitor with proper insulated pliers and electrically rated gloves...

Page 36: ...ansformer has failed the main control will need to be replaced Low Voltage Transformer Low Volt Transformer Diagnosing Low Volt Transformer To verify Low Volt Transformer operation AC Volts may be che...

Page 37: ...37 Service Main Board Continued next page Personality Settings...

Page 38: ...utton to save and exit then verify proper operation Switch S501 4 ON Make up air module equipped Switch S502 3 and S502 4 Are currently not used Switch S502 2 ON 265V model only Outlet Air Thermistor...

Page 39: ...s contained on this board There is a ferrite ring that the harness connecting the boards wraps around to minimize Electro Magnetic Interference EMI Three screws secure the User Interface Control Assem...

Page 40: ...e blower wheel inserts into a bearing assembly The main board supplies high voltage DC to drive the fan motor and receives speed feedback from the motor The motor is secured with a bracket and two scr...

Page 41: ...y The image above shows proper placement of the bearing Failure to install properly will result in a noise complaint Remove six screws to remove the end cap to access the bearing assembly Two screws a...

Page 42: ...fan shroud and motor assembly are attached to the base pan and outdoor coil assembly with twelve screws and a sleeve that slides over the shroud and outdoor coil assembly NOTE An extension will make...

Page 43: ...an blade which is attached to the motor shaft with a 3 8 in regular thread nut The motor is secured to the outdoor shroud with four 5 16 in hex head shoulder bolts NOTE If the wire clip found below th...

Page 44: ...switches to protect the circuit two are cycling resettable thermal switches and the one is a one shot thermal switch Features may vary depending model number throughout this Service Guide The heater...

Page 45: ...end cap to access the heater assembly Two screws are used to secure the bracket attached to the indoor coil and end cap After disconnecting the wire harness from the board and removing one ground scr...

Page 46: ...water is also collected in base pan but because outdoor temperatures may drop below freezing the water level could cause the outdoor fan blade to freeze in the pan To prevent this from occurring a the...

Page 47: ...eature is called a Make Up Air Module The feature includes a self contained sealed system and control module with a motorized duct door system This feature allows outdoor air to be conditioned and ent...

Page 48: ...d will change with the door closed The MUAM monitors the fans running with door closed After 30 seconds the damper door opens and the control is able to detect a change in fan operation The control is...

Page 49: ...d to the CDC connector can open close the circuit to stop operation of the Zoneline when closed and when open the Zoneline is operational The CDC connector can be used with an occupancy detection syst...

Page 50: ...onelines have an indoor coil outdoor coil compressor and refrigerant metering device capillary tubes A drier is part of the sealed system now included from the factory Additionally on heat pump models...

Page 51: ...3 296 7 2 505 7 15K 230V 2 227 7 3 093 7 15K 265V 2 840 7 3 225 7 Compressor Resistance Resistance spec is reported as room temperature readings BTU Microfarads 7k 15 uF 5 9k 30 uF 5 12k and 15k 30 u...

Page 52: ...frigerant system NOTE Care must be taken when soldering in the new check valve Thermal paste and a damp rag must be used on the middle portion of the assembly to prevent thermal damage to the internal...

Page 53: ...53 Sealed System Refrigerant Flow Cooling Features may vary depending model number throughout this Service Guide...

Page 54: ...54 Sealed System Refrigerant Flow Heating Features may vary depending model number throughout this Service Guide...

Page 55: ...pen Vapor Port Closed High Side Tap Valve WX5X328 Recovery Process High Pressure Switch On Filter 410A Recovery Cylinder Recovery Hose Hook Ups Complete charging and recovery information for R410A is...

Page 56: ...DACW5 36 oz AZ45E09DBMW5 36 oz AZ45E12DABW5 31 oz AZ45E12DACW5 31 oz AZ45E12DBMW5 37 oz AZ45E15DABW5 35 oz AZ45E15DACW5 35 oz AZ65H07DABW5 29 oz AZ65H07DACW5 29 oz AZ65H07DADW5 29 oz Model R410a oz AZ...

Page 57: ...57 Features differ by Model All features shown may not be on all models Schematic Wiring Diagram...

Page 58: ...s junction box RAK330D Direct Connect Pigtail 208 230 v 30 A includes junction box RAK515P Short Power Cord 265 v 15 A RAK520P Short Power Cord 265 v 20 A RAK530P Short Power Cord 265 v 30 A RAK515D D...

Page 59: ...40 Introduction 1 M Make Up Air Module 47 56 Mini Manual location 8 Model Serial location 8 N Nomenclature 8 O outdoor fan blade 7 46 outdoor fan motor 33 42 43 Outdoor fan shroud 42 P Personality 27...

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