Goodman Mfg A/GPG13 M Troubleshooting, Cooling Operation, Control Board Top, Unit Shutdown

Adjust the thermostat setting below room temperature.

1.Main burners must go OFF.

2.Circulating Air Blower will continue to run for 120, 135 or 150 seconds, depending on the setting.

To ensure the unit is properly charged for the intended application, check the unit refrigerant superheat at the compressor. The refrigerant superheat is a function of outdoor ambient temperature and return air temperature of the conditioned space. It is the installing contractors responsibility to ensure the proper refrigerant superheat at the compressor

1			10
2	5	8	11
2			11
3	6	9	12
3			12
6		9
		FS	K1

K2	R10
	R8

	D1
	L1
L2	L1
	UNUSED
L2
L2
	HEAT
L2
	COOL

	R31
	C27	D7
		D5
D3		R25
	C13
R38
	R22
D9	R29
D10	Z1

R34

R3

R35

C20
K3
D14	R4
K4	R11
D12	R42
	D11
R36
	LED

is adjusted for each application. For example, 10 degree refrigerant superheat level is adequate for a 95 degree outdoor ambient temperature and a 78 - 80 degree for indoor return air temperature. As the outdoor ambient temperature rises the superheat decreases and as the outdoor ambient temperature lowers the superheat increases. Proper superheat adjustment optimizes cooling performance.

Cooling Operation

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

1068-83-400A

Control Board (Top)

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

Unit Shutdown

1.Set the thermostat to lowest setting.

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.

WARNING

TO PREVENT PERSONAL INJURY OR DEATH, ALWAYS DISCONNECT ELECTRICAL POWER BEFORE INSPECTING OR SERVICING THE UNIT. ALL COMPRESSOR PROTECTION DEVICES RESET AUTOMATICALLY, ENERGIZING THE CONTACTOR AND OUTDOOR FAN.

Cooling Refrigerant Charging

Check unit charge before putting the cooling section into full operation. The unit is factory charged with R-410A for nominal air flow and static pressure conditions. The unit has a piston flowrator expansion device.

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.

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.

ABNORMAL OPERATION - HEATING

Internal Control Failure

If the integrated ignition control in this unit encounters an internal fault, it will go into a “hard” lockout and turn off the diagnostic LED. If diagnostic LED indicates an internal fault, check power supply to unit for proper voltage, check all fuses, circuit breakers and wiring. Disconnect electric power for five seconds. If LED remains off after restoring power, replace control.

External Lockout

An external lockout occurs if the integrated ignition control determines that a measurable combustion cannot be established within three (3) consecutive ignition attempts. If flame is not established within the seven (7) second trial for ignition, the gas valve is de-energized, 15 second inter-purge cycle is completed, and ignition is reattempted. The control will repeat this routine three times if a measurable combustion is not established. The control will then shut off the induced draft blower and go into a lockout state.

If flame is established but lost, the control will energize the circulator blower at the heat speed and then begin a new ignition sequence. If flame is established then lost on subsequent attempts, the control will recycle for four (4) consecutive ignition attempts (five attempts total) before locking out.

15