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Heat pumps · Error codes

Clivet heat pump error codes

Clivet · A niche brand in the UK. 55 codes across 2 product families, each taken from the manufacturer’s manuals.

Find a Clivet engineer →55 codes · reviewed 23 September 2026

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Type the code on your display or a word from its meaning. Each code opens its own page with what it means, whether it is safe and what you can check.

55 codes

CodeMeaningStops?Homeowner check?
bH
PED board error
Not statedYes
C0
Multiple units configured as master in the network (printed 'CO')
Not statedYes
C7
Transducer module temperature too high
Not statedYes
E0
Flow switch error
Not statedYes
E1
Phase sequence error (three-phase units)
Not statedYes
E2
Communication error between user interface and control board
Not statedYes
E3
T1 sensor error (backup heater outlet water)
Not statedYes
E4
T5 sensor error (DHW temperature)
Not statedYes
E5
T3 sensor error (finned coil outlet)
Not statedYes
E6
T4 sensor error (outdoor ambient temperature, as transcribed 'room temperature')
Not statedYes
E7
Tbt1 sensor error
Not statedYes
E8
Water flow-rate error
Not statedYes
E9
Th suction pipe sensor error
Not statedYes
EA
Tp discharge temperature sensor error
Not statedYes
Eb
Tsolar solar panel sensor error
Not statedYes
Ec
Additional DHW storage temperature sensor (Tbt2) error
Not statedYes
Ed
Tw_in entering water temperature sensor error
Not statedYes
EE
Control board EEPROM failure
Not statedYes
F1
DC generatrix voltage too low
Not statedYes
H0
Communication error main PCB - inverter module (as transcribed)
Not statedYes
H1
Communication error main PCB - hydraulic module (as transcribed)
Not statedYes
H2
Plate heat exchanger T2 sensor error
Not statedYes
H3
Plate heat exchanger T2B sensor error
Not statedYes
H4
Three P6 protection activations
Not statedYes
H5
Internal (room) temperature sensor Ta error
Not statedYes
H6
DC fan malfunction
Not statedYes
H7
Main circuit voltage fault
Not statedYes
H8
Pressure sensor error
Not statedYes
H9
Tw2 sensor error
Not statedYes
HA
Water outlet temperature sensor (Tw_out) error
Not statedYes
Hb
PP protection trips 3 times with water temperature below 7 C
Not statedYes
Hd
Master-slave communication error
Not statedYes
HE
Main board - thermostat (transfer board) communication error
Not statedYes
HF
Inverter EEPROM error
Not statedYes
HH
H6 displayed 10 times in 2 hours
Not statedYes
HL
PFC module fault
Not statedYes
HP
Low pressure protection tripped 3 times in an hour
Not statedYes
L0
Compressor inverter module fault
Not statedYes
L1
Low voltage DC bus protection of inverter module
Not statedYes
L2
High voltage DC bus protection of inverter module
Not statedYes
L4
MCE protection
Not statedYes
L5
Speed 0 protection
Not statedYes
L7
Phase sequence error
Not statedYes
L8
Compressor frequency variation greater than 15 Hz in 1 s
Not statedYes
L9
Compressor frequency difference to target greater than 15 Hz
Not statedYes
P0
Low pressure protection
Not statedYes
P1
High pressure protection
Not statedYes
P3
Compressor overcurrent protection
Not statedYes
P4
High discharge temperature protection
Not statedYes
P5
High temperature difference protection (plate heat exchanger)
Not statedYes
P6
Module protection
Not statedYes
P9
Fan protection
Not statedYes
Pb
Antifreeze protection
Not statedYes
Pd
High refrigerant outlet temperature of finned coil in cooling mode
Not statedYes
PP
Inlet water temperature higher than outlet water temperature in heating mode
Not statedYes