P8 on a Gree heat pump: Radiator or IPM or PFC module overtemperature
Short answer
On a Gree heat pump, P8 means: Radiator or IPM or PFC module overtemperature. The heat pump stops until the fault clears or is reset. An engineer is needed to fix the cause. The wording differs by model range — each is shown below.
Reviewed 23 September 2026 · 6 sources
What it means
On the Versati II (R410A)
The manual says: Radiator or IPM or PFC module overtemperature.
Part involved: compressor, inverter/driver PCB, power supply.
On the Versati III Monobloc (R32)
The manual says: Radiator or IPM or PFC module overtemperature.
Part involved: compressor, inverter/driver PCB, power supply.
On the Versati III Split / All-in-one (R32)
The manual says: Radiator or IPM or PFC over-temperature.
Part involved: compressor, inverter/driver PCB, power supply.
On the Versati IV Monobloc (R32)
The manual says: Overheat protection of heat sink.
On the Versati IV Split / All-in-one (R32)
The manual says: Radiator or IPM or PFC over-temperature.
Part involved: compressor, inverter/driver PCB, power supply.
On the Versati V R290 Monobloc
The manual says: Radiator or IPM or PFC over-temperature.
Part involved: compressor, inverter/driver PCB, power supply.
Is it safe?
On the Versati II (R410A)
| Does the heat pump stop? | Yes |
|---|---|
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
Resetting itself: unknown.
On the Versati III Monobloc (R32)
| Does the heat pump stop? | Yes |
|---|---|
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
Resetting itself: unknown.
On the Versati III Split / All-in-one (R32)
| Does the heat pump stop? | Yes |
|---|---|
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
Resetting itself: unknown.
On the Versati IV Monobloc (R32)
| Does the heat pump stop? | Not stated |
|---|---|
| Engineer needed? | Yes |
The manual does not say whether the heat pump stops.
Resetting itself: unknown.
On the Versati IV Split / All-in-one (R32)
| Does the heat pump stop? | Yes |
|---|---|
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
Resetting itself: unknown.
On the Versati V R290 Monobloc
| Does the heat pump stop? | Yes |
|---|---|
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
Resetting itself: unknown.
What you can check
On the Versati II (R410A)
- Note the code shown on the controller and the unit model numbers (on the rating plate label) before contacting your installer.
- Check the heat pump's breaker/isolator at the consumer unit is on; do not open any casing.
- If the breaker or RCD trips repeatedly, leave the heat pump switched off and call an engineer; do not keep resetting it.
On the Versati III Monobloc (R32)
- Note the code shown on the controller and the unit model numbers (on the rating plate label) before contacting your installer.
- Check the heat pump's breaker/isolator at the consumer unit is on; do not open any casing.
- If the breaker or RCD trips repeatedly, leave the heat pump switched off and call an engineer; do not keep resetting it.
On the Versati III Split / All-in-one (R32)
- Note the code shown on the controller and the unit model numbers (on the rating plate label) before contacting your installer.
- Check the heat pump's breaker/isolator at the consumer unit is on; do not open any casing.
- If the breaker or RCD trips repeatedly, leave the heat pump switched off and call an engineer; do not keep resetting it.
On the Versati IV Monobloc (R32)
- Note the code shown on the controller and the unit model numbers (on the rating plate label) before contacting your installer.
- Check the heat pump's breaker/isolator at the consumer unit is on; do not open any casing.
On the Versati IV Split / All-in-one (R32)
- Note the code shown on the controller and the unit model numbers (on the rating plate label) before contacting your installer.
- Check the heat pump's breaker/isolator at the consumer unit is on; do not open any casing.
- If the breaker or RCD trips repeatedly, leave the heat pump switched off and call an engineer; do not keep resetting it.
On the Versati V R290 Monobloc
- Note the code shown on the controller and the unit model numbers (on the rating plate label) before contacting your installer.
- Check the heat pump's breaker/isolator at the consumer unit is on; do not open any casing.
- If the breaker or RCD trips repeatedly, leave the heat pump switched off and call an engineer; do not keep resetting it.
What the engineer will check
On the Versati II (R410A)
- Follow the Gree troubleshooting flowchart for this code in the service manual.
- Check supply voltage and phase balance.
- Check compressor windings and inverter/driver PCB per flowchart.
- Check heat-sink cooling and connections.
Who to ask for: Heat pump engineer.
Certification: Heat pump installer competence; F-gas / flammable-refrigerant (R290/R32) handling competence for any refrigerant-circuit work.
On the Versati III Monobloc (R32)
- Follow the Gree troubleshooting flowchart for this code in the service manual.
- Check supply voltage and phase balance.
- Check compressor windings and inverter/driver PCB per flowchart.
- Check heat-sink cooling and connections.
Who to ask for: Heat pump engineer.
Certification: Heat pump installer competence; F-gas / flammable-refrigerant (R290/R32) handling competence for any refrigerant-circuit work.
On the Versati III Split / All-in-one (R32)
- Follow the Gree troubleshooting flowchart for this code in the service manual.
- Check supply voltage and phase balance.
- Check compressor windings and inverter/driver PCB per flowchart.
- Check heat-sink cooling and connections.
Who to ask for: Heat pump engineer.
Certification: Heat pump installer competence; F-gas / flammable-refrigerant (R290/R32) handling competence for any refrigerant-circuit work.
On the Versati IV Monobloc (R32)
- Follow the Gree troubleshooting flowchart for this code in the service manual.
- Follow the manufacturer's troubleshooting flowchart for this code.
Who to ask for: Heat pump engineer.
Certification: Heat pump installer competence; F-gas / flammable-refrigerant (R290/R32) handling competence for any refrigerant-circuit work.
On the Versati IV Split / All-in-one (R32)
- Follow the Gree troubleshooting flowchart for this code in the service manual.
- Check supply voltage and phase balance.
- Check compressor windings and inverter/driver PCB per flowchart.
- Check heat-sink cooling and connections.
Who to ask for: Heat pump engineer.
Certification: Heat pump installer competence; F-gas / flammable-refrigerant (R290/R32) handling competence for any refrigerant-circuit work.
On the Versati V R290 Monobloc
- Follow the Gree troubleshooting flowchart for this code in the service manual.
- Check supply voltage and phase balance.
- Check compressor windings and inverter/driver PCB per flowchart.
- Check heat-sink cooling and connections.
Who to ask for: Heat pump engineer.
Certification: Heat pump installer competence; F-gas / flammable-refrigerant (R290/R32) handling competence for any refrigerant-circuit work.
What you might notice
Sources
- Air to Water Heat Pump Service Manual Versati II (T1/R410A/50Hz, GC201308-) ↗ · GC201308 · page p.63 (printed; PDF p.66) - '2) Drive Failure Code' · Reviewed 23 September 2026
- VERSATI III Air To Water Heat Pump (Monobloc) Service Manual ↗ · page p.122 (printed; PDF p.122) · Reviewed 23 September 2026
- Service Manual for VERSATI R32 SPLIT (VERSATI III Split Type Air To Water Heat Pump) ↗ · page p.109 (printed; PDF p.113) · Reviewed 23 September 2026
- Air-to-water Heat Pump Owner's Manual (Versati IV Monobloc, SG version) ↗ · page p.56-57 (printed; PDF p.60-61) - '(2) Drive failure code' · Reviewed 23 September 2026
- VERSATI IV Split Type Air To Water Heat Pump Service Manual ↗ · page p.67 (printed; PDF p.77) · Reviewed 23 September 2026
- VERSATI V Monobloc Type Air-to-water Heat Pump Service Manual (R290) ↗ · page p.31 (printed; PDF p.34) · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026