Installation guide

41
VMBME102
14 Troubleshooting
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NOTE! This troubleshooting section contains general heat pump information for the whole range and can therefore contain certain
points that do not apply to the installed heat pump.
14.1 Alarm list
Shown in display in the event of an alarm. To reset alarms 1-5. set the operating mode to OFF or cut the power supply.
Message Meaning
HIGHPRESS ERROR Tripped high pressure switch. Compressor stopped. No hot water production.
LOWPRESS ERROR Tripped low pressure switch. Compressor stopped. No hot water production.
MOTOR P ERROR Deployed motor protection (Over current relay compressor). Compressor stopped. No hot water production.
BRINE OUT Brine supply does not exceed set temperature. Compressor stopped. No hot water production. Not normally
activated.
BRINEFLOW LOW Flow sensor not active during last start. Compressor stopped. No hot water production.
ADD. HEAT Overheating protection deployed. No auxiliary heating active.
SENSOR OUTDOOR Fault in outside sensor. Zero degrees used for calculations.
SENSOR FRONT Incorrect supply pipe sensor. Everything stops except circulation pump.
SENSOR RETURN Return sensor fault. Return temperature = Supply pipe – 5 is used. Calculated supply temperature limited to
maximum 45°C.
SENSOR HOT WATER Fault on sensor for start temperature. No hot water production.
SENSOR DEFROST Defrost sensor fault. Heat and hot water production is controlled from the outdoor sensor’s value instead.
MS FAN Deployed motor protection for outdoor unit fan. Compressor stopped. No hot water production.
SENSOR COOLING Sensor fault. Cooling function stops.
14.2 Measurement points
Conversion table for sensors
NOTE! When reading the resistance of the sensors. the sensor leads must first be disconnected from the control equipment.
Outdoor sensor Other sensors
°C
kohm
°C
kohm
-30 1884 0 66.3
-25 1443 5 52.4
-20 1115 10 41.8
-15 868 15 33.5
-10 681 20 27.1
-5 538 25 22.0
0 428 30 18.0
5 343 35 14.8
10 276 40 12.2
15 224 45 10.1
20 183 50 8.5
25 150 55 7.1
30 124 60 6.0
35 103 65 5.0
40 86 70 4.2
75 3.7
80 3.1
85 2.7
90 2.3
95 2.0
1. First measure the sensor including the cable.
2. Then measure the sensor only.