507
REVO-E Heat pump 5 Troubleshooting
– Voltage at the solenoid valve 0V= closed / 24V open
– Pressure level in low pressure range using manome-
ter when compressor >2 bar - expansion valve OK
– Suction pressure sensor on X854 plug
– Power supply of the connected sensor (5V)
– Sensor voltage (feedback) when compressor de-
activated
– Sensor voltage (feedback) when compressor de-
activated (2V-4V)
Note: Compressor controllable using DCT compo-
nents test.
Actions
– Unlocking the system: Press and hold for at least 15
sec. the gas charging button (above the driver). See
vehicle documentation.
System can then be inspected.
– Replace solenoid valve
– Replace expansion valve or refill according to Volvo
documentation
– Replace suction pressure sensor
F17 Icing on the inner heat exchangers in Cooling
Mode
System behavior (in Air-conditioning Mode possible
only)
– Cooling functionality temporarily limited / air-condi-
tioning system in Ventilation Mode
– Compressor turned off until deiced (<2 bar absolute
pressure for at least 15s)
Necessary inspections
– Sensor values using DCT
– Visually inspect icing on the evaporator
– Visually inspect contamination of fresh air filter
– Expansion valve (suction pressure >2 bar)
– Refrigerant level
Actions
– Defrost evaporator
– Replace fresh air filter
– Replace expansion valve(s)
– Refill according to Volvo documentation
F18 Common error in EDS (Electrical Drive System)
System behavior
– Compressor does not start
– Red LED of frequency converter is blinking
Note: No common problem of the frequency converter
Necessary inspections
– Sensor values using DCT
– Only relevant in connection with other errors
– Inspect high pressure safety switch
– Inspect low pressure safety switch
– Read off from error memory of frequency converter
(handheld reader / PC diagnostic)
– Insulation test signal line frequency converter against
its housing
Actions
– Eliminate error depending on other errors entered
– Eliminate error in frequency converter according to
EPA description (see OI REVO-E Diagnostics)
F20 “Alternate charging status” signal not received
System behavior
– Limited cooling functionality - Ventilation Mode
Necessary inspections
– Vehicle system
– CAN bus communication
Actions
– Eliminate error according to vehicle documentation
F23 “Maxpowerallowed” signal not received
System behavior
– Compressor runs without limitations, sometimes very
high power usage
Necessary inspections
– Vehicle system
– CAN bus communication
Actions
– Eliminate error according to vehicle documentation
F24 Frequency converter / inverter error
System behavior
– System locked - system in Ventilation Mode
Error entry after 10x F18 (Common EDS)
Note: without simultaneous high or low pressure event
(other FS)
Necessary inspections
– Sensor values using DCT
– Read off from error memory of frequency converter
(handheld reader / PC diagnostic)
– Safety chain (high / low pressure safety switch / fre-
quency converter)
– Continuity test of X854 plug Pin3 and Pin11
– Individual components of safety chain (pressure
switch)
Actions
– Replace pressure switch
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