Bosch SHP65TL5UC Repair Instructions page 79

6.3.4 Heat pump terminal measurements
There are two connectors, 6-pin heater and 3-pin motor.
Heater
1 – Ground
2 – Heater line / hot (L)
3 – Heater neutral (N)
4 – NTC 1
5 – NTC common
6 – NTC 2
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Motor
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6.3.4.1 6-pin connector (heater / NTC's / pump ground)
The 6-pin connector on the side of the heat pump connects to the
heat pump heater, heater NTC's and ground.
To check the 1200 W heater, measure the resistance between
terminals 2 – 3. If the resistance = ∞, the heater has failed and
the heat pump must be replaced.
Heater resistance as follows:
2 – 3: ~ 8.9 Ω (@ 77 ºF)
NTC resistances as follows:
4 – 5: ~ 10 kΩ (@ 77 ºF)
5 – 6: ~ 10 kΩ (@ 77 ºF)
4 – 6: ~ 20 kΩ (@ 77 ºF)
6.3.4.2 3-pin connector (3-pole BLDC motor)
The 3-pin connector on the end of the heat pump connects to the
3-pole BLDC motor. The power module controls motor speed,
starting and stopping.
Motor resistances as follows:
1 – 2: ~ 15.2 Ω (@ 68 ºF)
2 – 3: ~ 15.2 Ω (@ 68 ºF)
3 – 1: ~ 15.2 Ω (@ 68 ºF)
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