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Parameter 720
Fault code E133
Schematic
Part no.
Previous solution
9:41
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Which parameter controls the heating curve on this model?
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Parameter 720
Sets the heating curve. Lower it by 0.2 per step and check the flow temperature.
Manufacturer manual
p. 47
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E 133
Heating curve 1,5 → 1,3
Wiring diagram
CONTROL S5 PUMP
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“Where is sensor S5 located?”
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“What should I check first with this fault?”
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Where is sensor S5?
Sensor S5
Bottom left under the heat exchanger, behind the insulation plate. See schematic p. 31.
Where is sensor S5?
“What should I check first with this fault?”
Voice converted to text
AIR-TO-WATER HEAT PUMP TYPE PLATE
MODELWH-MDC07J3E5
SERIAL2J41 0087 3312
REFRIGERANTR32 · 1,30 kg
SUPPLY230 V ~ 50 Hz
MADE IN EU
Recognised
Heat pump · WH-MDC07J3E5
Manuals, fault codes and parameters for this heat pump are ready.
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Manuel
High confidence
Parameter 720
Heating curve setting
1 Open the service menu and go to parameter 720.
2 Lower the heating curve by 0.2 per step.
3 Check the flow temperature after 15 minutes.
Source
Manufacturer manual · Page 47
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Installation manual.pdf
47 / 128
7.3 Heating parameters
720 — Heating curve
0,2 – 4,0
Sets the ratio between outdoor temperature and flow temperature. Factory setting 1.5.
“On this type, check the outdoor sensor first — saves a trip.” — Harry
Source
Manufacturer manual · Page 47
Open source
Installation manual.pdf
47 / 128
7.3 Heating parameters
720 — Heating curve
0,2 – 4,0
Sets the ratio between outdoor temperature and flow temperature. Factory setting 1.5.
Company knowledge
Tip from a colleague · previous job
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Previous job
“On this type, check the outdoor sensor first — saves a trip.” — Harry

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Week 12 · solves a tricky fault
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“On this model: check the sensor connection before replacing the PCB.”
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Week 19 · same symptom, different job
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Check the sensor connection first — Technician A, week 12.
Manufacturer manual
PCB replacement procedure · p. 62
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Week 12 · solves a tricky fault
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“On this model: check the sensor connection before replacing the PCB.”
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Technician B
Week 19 · same symptom, different job
Replace the PCB on this model?
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Check the sensor connection first — Technician A, week 12.
Manufacturer manual
PCB replacement procedure · p. 62
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Fault code E133
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