7 8 |
Bosch IDS 2.0
Service Manual
07.2021
|
Bosch Thermotechnology Corp.
Data subject to change
Component Check
Measure location
Parameter
When to check
High voltage power supply to board
Terminal Block
(L1-L)
172-270V(AC)
When there is high voltage power to unit
Thermostat connection
CN5
(Y1-C, Y2-C, R-C, G-C)
CN4
(Dh-C, B-C, W1-C, W2-C)
18-30V(AC)
When there is call from thermostat
LED light
LED 4
Light or fl ash
When there is high voltage power to unit
Electric heat
CN6
(W1-C, W2-C)
172-270V(AC)
When there is a call for electric heat
Low voltage power supply to board
CN33
18V-30V(AC)
When there is high voltage power to unit
Indoor blower motor
CN39-COM
CN35 (1,2,3,4,5-C)
¹
230V(AC)
18-30V(AC)
When there is high voltage power to unit
When the compressor is running
Table 52
Indoor Board Component Check
1) Depends on SW6-1&2 dipswitch fan speed settings. High or low speed depends
on if Y1 (low) or Y2 (high) call. Measure between speed pin and C (brown wire).
