In the tables below you can find the list of possible troubles which you can encounter using your Gibson heat pump. The information given there may be helpful in case of your heat pump not working properly.
The types of defects or breakdowns are various. There are detailed descriptions of possible problems and causes of heat pump not cooling or heat pump fan not spinning. Here you can find some questions which give you the idea what to investigate or to check before addressing to the specialists.
The Gibson heat pump flash codes given in the tables and their descriptions are meant to give you the key to the possible problems you have with your heat pump. Do not try to do any repair if you are not a specialist!
Gibson JT4BD Heat Pump Troubleshooting
Problem | Possible Cause |
---|---|
Unit does not operate immediately after being restarted. | Unit control initiates a 3 minute delay at the end of each cycle to protect the compressor from damage. |
A whoosh or gurgling noise can be heard at the indoor unit. | Sometimes, the refrigerant can be heard in the indoor coil when the outdoor unit starts or stops operation. This is not a malfunction. |
Mist is coming out of the indoor unit during cooling operation. | This sometimes happens when the indoor temperature and humidity are very high and the air is being cooled quickly. The mist will disappear as the indoor temperature and humidity are lowered. |
A creaking or popping noise can be heard when the unit starts or stops. | The plastic components of the indoor units sometimes expand and contract when they are heated and cooled. |
Unit is not operating. | Are the TIMER ON and TIMER OFF features being used incorrectly? |
Is power disconnected or has circuit breaker tripped. | |
Is power shut down? | |
System is not cooling (or heating) efficiently. | Is temperature setting correct? |
Are either the air inlet or air outlet blocked on the outdoor or indoor unit? | |
Is filter dirty? | |
Is fan at low speed? | |
Are windows and doors properly shut? | |
Wireless remote is not working. | Is remote in direct line of sight with indoor unit infrared receiver? Has the remote been damaged? |
Remove remote control batteries for 30 seconds, then reinsert them. Replace batteries, if necessary. | |
Water is leaking from indoor unit. | Indoor humidity level is very high and water is being blown from indoor coil. This will stop as humidity level is reduced. |
Water is leaking from condensate line at indoor unit. | Check condensate line outside to make sure it is not obstructed. |
Check condensate line to make sure it has not been disconnected from indoor unit. | |
Water is leaking from the outdoor unit. | During operation in high humidity areas, condensate will form on cold outdoor refrigerant pipes. |
When heat pump is operating in defrost mode, ice will thaw from around outdoor coil and water will flow from the unit. | |
Clicking noise heard inside. | Sometimes, the sound of the outdoor unit fan or compressor relay can be transmitted in a way that makes it seem to be coming from the indoor unit. |
Indoor fan is not working. | Heat pump units - In HEAT mode, a timed delay keeps indoor fan off for two minutes to prevent unheated air from being circulated by the indoor fan. |
Heat pump units - In HEAT mode, cold outdoor temperatures and high humidity cause frost to accumulate on the outdoor unit. When this happens, the unit will enter a defrost cycle. The indoor fan is off during the 3 - 12 minute cycle. | |
In DRY mode, indoor fan operation may be stopped to avoid delivery of moist air to the room. Do not adjust temperature setting. |
Gibson JT5BD Heat Pump Troubleshooting
FLASH CODE | FAULT DEFINITION |
---|---|
On, No Flash | Standby |
1, Pause | Low Stage |
2, Pause | High Stage |
Continuous Flash | Emergency Mode |
16 | System Communications Failure |
25 | Invalid Model Plug |
31 | High Pressure Switch Trip |
32 | Low Pressure Switch Trip |
45 | Control Fault |
46 | Brown out (230V) |
47 | No 230v with Call to Run |
53 | Outdoor Air Temp Sensor |
55 | Coil Temp Sensor |
56 | Temp Sensor Range Error |
71 | Low Stage Thermal Cutout |
72 | High Stage Thermal Cutout |
73 | Contactor Shorted |
74 | Contactor Open (No 230v to Comp) |
81 | Low Stage Thermal Lockout (4 HRS) |
82 | High Stage Thermal Lockout (4 HRS) |
83 | Low Pressure Lockout (4 HRS) |
84 | High Pressure Lockout (4 HRS) |
Gibson 13 SEER Heat Pump Troubleshooting
STATUS INDICATOR | STATUS TYPE | DIAGNOSTIC DESCRIPTION |
---|---|---|
C1 | Operating Status | Cooling, 1st Stage |
H1 | Heating, 1st Stage | |
SC | Anti Short Cycle Timer | |
OF | Defrost | |
- - | Power on, no call for operation | |
1 | Fault | Pressure switch, low |
2 | Pressure switch, high | |
3 | Temperature Sensor, Ambient | |
4 | Temperature Sensor, Coil | |
5 | Board | |
OF (FLASHING) | Input Error | Forced defrost - test short applied longer than 11 minutes |
Gibson R410A Heat Pump Troubleshooting
Status LED | Status LED Description | Status LED Troubleshooting Information |
---|---|---|
Green "POWER” | Module has power | Supply voltage is present at module terminals |
Red "TRIP” | Thermostat demand signal Y is present, but the compressor is not running | 1. Compressor protector is open |
2. Outdoor unit power disconnect is open | ||
3. Compressor circuit breaker or fuse(s) is open | ||
4. Broken wire or connector is not making contact | ||
5. Low pressure switch open if present in system & Compressor contactor has failed open | ||
Yellow “ALERT" Flash Code 1 | Long Run Time Compressor is running extremely long run cycles | 1. Low refrigerant charge |
2. Evaporator blower is not running | ||
3. Evaporator coil is frozen | ||
4. Faulty metering device | ||
5. Condenser coil is dirty & Liquid line restriction (filter drier blocked if present in system) | ||
7. Thermostat is malfunctioning | ||
8. Comfort Alert Failure | ||
Yellow “ALERT” Flash Code 2 | System Pressure Trip Discharge or suction pressure out of limits or compressor overloaded | 1. High head pressure |
2. Condenser coil poor air circulation (dirty, blocked, damaged) | ||
3. Condenser fan is not running | ||
4. Return air duct has substantial leakage | ||
5. If low pressure switch present in system, check Flash Codel information | ||
Yellow “ALERT" Flash Code 3 | Short Cycling Compressor is running only briefly | 1. Thermostat demand signal is intermittent |
2. Time delay relay or control board defective | ||
3. If high pressure switch present go to Rash Code 2 information | ||
4. If low pressure switch present go to Flash Code 1 information | ||
Yellow “ALERT" Flash Code 4 | Locked Rotor | 1. Run capacitor has failed |
2. Low line voltage (contact utility if voltage at disconnect is low) | ||
• Check wiring connections | ||
1 Excessive liquid refrigerant in compressor 4. Compressor bearings are seized | ||
• Measure compressor oil level | ||
Yellow “ALERT” Flash Code 5 | Open Circuit | 1. Outdoor unit power disconnect is open |
2. Com pressor circuit breaker or f use(s) is open | ||
3. Compressor contactor has failed open | ||
• Check compressor contactor wiring and connectors | ||
• Check for compressor contactor failure (burned, pitted or open) | ||
• Check wiring and connectors between supply and compressor | ||
• Check for low pilot voltage at compressor contactor coil | ||
4. High pressure switch is open and requires manual reset | ||
5. Open circuit in compressor supply wiring or connections & Unusually long compressor protector reset time due to extreme ambient temperature | ||
6. Compressor windings are damaged | ||
• Check compressor motor winding resistance | ||
Yellow “ ALERT " Flash Code 6 | Open Start Circuit Current only in run circuit | 1. Run capacitor has failed |
2. Open circuit in compressor start wiring or connections | ||
• Check wiring and connectors between supply and the compressor “S” terminal | ||
1 Compressor start winding is damaged | ||
• Check compressor motor winding resistance | ||
Yellow "ALERT” Flash Code 7 | Open Run Circuit Current only in start circuit | 1. Open circuit in compressor run wiring or connections |
• Check wiring and connectors between supply and the compressor “R" terminal | ||
2. Compressor run winding is damaged | ||
• Check compressor motor winding resistance | ||
Yellow “ ALERT " Flash Code 8 | Welded Contactor Compressor always runs | 1. Compressor contactor has failed closed |
2. Thermostat demand signal not connected to module | ||
Yellow "ALERT" Flash Code 9 | Low Voltage Control circuit« 17VAC | 1. Control circuit transformer is overloaded |
2. Low line voltage (contact utility if voltage at disconnect is low) | ||
• Check wiring connections |
Gibson KG7S Heat Pump Troubleshooting
GREEN LED | RED LED | DIAGNOSTIC |
---|---|---|
Off | Off | Control Fault (No Power) |
On | On | Normal Operation |
On | Flash | Motor Fault |
Flash | On | Twin Fault (no motor fault) |
Flash | Flash | Communications Fault |
Off | Off | Control Fault (No Power) |
On | On | Normal Operation |
On | Flash | Motor Fault |
Flash | Flash | Communications Fault |
Gibson Heat Pump Troubleshooting
ALERT CODE | ALERT CONDITION |
---|---|
Normal Run Solid Yellow | Normal operation, no trip |
Code l Yellow Flash 1 | Long run time. Compressor is on running for more than 18 hours. |
Code 2 Yellow Flash 2 | Compressor (pressure) trip. Compressor runs for 12 sec to 15 min followed by a compressor trip condition lasting for more than 7 min. |
Code 3 Yellow Flash 3 | Pressure switch cycling. Compressor runs for 12 sec to 15 min followed by a compressor trip lasting between 35 sec to 7 min. |
Code 4 Yellow Flash 4 | Locked rotor. Compressor trips within a compressor run time of 12 sec and does not start within 35 sec. |
Code 5 Yellow Flash 5 | Compressor (moderate run) trip. Compressor runs for 15 min to 18 hrs followed by a compressor trip lasting longer than 7 min. |
Code 9 Red Flash 9 | The current to the PROT terminal is greater than 2A. |
Trip Solid Red | Demand is present, but compressor is not running. |