Goodman Mfg PG 15 specifications Troubleshooting

LOCOOL
	U6
HICOOL
	U7
LOHEAT	U4
			U3
										K2
HIHEAT
	U5		P1
										K1
SPEEDUP			F1
SW1
FAULT	BLOWER	STAGE	ECON	R	C	W1	W2	G	Y1	Y2
RECALL	OFFDELAY	DELAY

space. It is the installing contractors responsibility to ensure the proper refrigerant sub-cooling at the condenser is adjusted for each application. As the outdoor ambient temperature rises the sub-cooling decreases and as the outdoor ambient temperature lowers, the sub-cooling increases. NOTE: Proper sub-cooling adjustment optimizes cooling performance. Models equipped with thermostatic expansion valve, charge the system to sub-cooling, range shown on chart, when necessary, adjust expansion valve stem for superheat setting.

NOTE: The expansion valve will not need adjustment for most applications. Ensure system superheat is set within range listed on chart.

Control Board (Top)

Design superheat & subcooling @ 95 °F outdoor ambient temperature

NOTE: If necessary, adjust fan OFF delay settings to obtain satis- factory comfort level.

Unit Shutdown

1. Set the thermostat to lowest setting.

Models #

GPG152407041

GPG153009041

GPG153709041

GPG154211541

GPG154911541

GPG156014041

Superheat Adjustment

Superheat °F

8 ‐ 12

8 ‐ 12

5 ‐ 9

5 ‐ 9

5 ‐ 9

5 ‐ 9

Subcooling °F

‐‐‐

‐‐‐

‐‐‐

‐‐‐

‐‐‐

12 ‐ 18

2.	Turn off the electrical power supply to the unit.
3.	Remove the heat exchanger door on the side of the unit by
	removing screws.
4.	Move the gas control valve switch to the OFF position. Do
	not force.
5.	Close manual gas shutoff valve external to the unit.
6.	Replace the heat exchanger door on the unit.
7.	If cooling and/or air circulation will be desired, turn ON the
	electrical power.

COOLING STARTUP

NOTE: Check all manual reset limit controls in heating circuit if cooling mode does not operate.

Compressor Protection Devices

The compressor includes components which are designed to protect the compressor against abnormal operating conditions.

To adjust superheat, remove the control box cover and locate the expansion valve on the liquid line of the evaporator. Unscrew the cover from the expansion valve, locate the adjustment screw, and turn it clockwise (in) to increase superheat or counterclockwise (out) to decrease superheat. Replace adjustment cap. Wait a minimum of 10 minutes between adjustments to allow time for the TXV and pressures to stabilize.

Cooling Operation

NOTE: Mechanical cooling cannot be reliably provided at ambient temperatures below 50° F.

1.Turn on the electrical power supply to the unit.

2.Place the room thermostat selector switch in the COOL position (or AUTO if available, and if automatic changeover from cooling to heating is desired).

3.Set the room thermostat to the desired temperature.

Refrigerant Charge Check (Units with Fixed Orifice Devices)

After completing airflow measurements and adjustments the unit’s refrigerant charge must be checked. All package units with fixed orifice devices are charged using the super heat method at the compressor suction line.

For charge adjustments, see superheat and charts shown for each model.

Cooling Refrigerant Charging (Models with TXV)

Check unit charge before putting the cooling section into full operation. The unit has a thermostatic expansion valve metering device. To ensure the unit is properly charged for the intended application, check the unit refrigerant sub-cooling at the condenser. The refrigerant sub-cooling is a function of outdoor ambient temperature and return air temperature of the conditioned

TROUBLESHOOTING

IGNITION CONTROL ERROR CODES

The following presents probable causes of questionable unit operation. Refer to Diagnostic Indicator Chart for an interpretation of the signal and to this section for an explanation.

Remove the control box access panel and note the number of diagnostic LED flashes. Refer to Diagnostic Indicator Chart for an interpretation of the signal and to this section for an explanation.

FAULT RECALL

The ignition control is equipped with a momentary push-button switch that can be used to display on the diagnostic LED the last five faults detected by the control. The control must be in Standby Mode (no thermostat inputs) to use the feature. Depress the push- button switch for approximately 2 seconds. NOTE: Do not hold for longer than 4 seconds. Holding the button for 4 seconds or higher will erase the memory! Release the switch when the LED is turned off. The diagnostic LED will then display the flash codes associated with the last five detected faults. The order of display is the most recent fault to the least recent

15fault.