Remove old pressure switches
DANGERRisk of electric shock!
Risk of electric shock!
De-energise the condensing unit and secure against being switched on again!
For work on the electrical and/or electronic system: Check mains phases L1, L2, L3 for absence of voltage!
WARNINGCompressors or other components of the condensing units may be under pressure!
Compressors or other components of the condensing units may be under pressure!
Serious injuries are possible.
Depressurise all relevant components!
Wear safety goggles!
Unscrew and remove lateral housing plate
- 4 mm hexagon spanner
Remove cable ties at old low and high pressure switches
- Side cutter
LHL3E
The LHL3E condensing units contain 2 cylinder compressors (2EES .. 2CES) instead of 4 cylinder compressors as shown in the video. The positions of the low and high pressure switches differ:
1 (HP) | Connection for high pressure switch (HP) | 3 (LP) | Connection for low pressure switch (LP) |
Remove old low pressure switch
- Spanners SW 15 und SW 12 (or open-ended spanner) to counter-hold
- open-ended spanner
Remove old high pressure switch
- Spanners SW 15 und SW 13 to counter-hold
- open-ended spanner
Open cable duct
Remove plug X4 from terminal strip
Untie oil heater cables (brown and blue) from plug X4
- Side cutter
- Cutter knife with fresh blade
- After that: Remove and dispose old plug X4 and old cables of high and low pressure switch.