Outdoor Unit - Daikin ALTHERMA HT Service Manual
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Also See for ALTHERMA HT:
- User manual (12 pages) ,
- Installer's reference manual (296 pages)
Table of Contents
ESIE09-08B
Legend
Appendix
Part number
R3T
Subcool calculation.
R4T
Used to control and protect the water system.
R5T
Used to control and protect the water system.
Used to detect discharge pipe temperature, make the temperature protection control of
R6T
compressor, and others.
R7T
Subcool calculation.
In order to prevent the increase of high pressure when a malfunction occurs, this switch is
S1PH
activated at high pressure of 3.8 MPa or more to stop the compressor operation.
B1PL
Used to detect low pressure.
B1PH
Used to detect high pressure.
K1E
Used to regulate the refrigerant flow of R-410A.
K2E
Used to regulate the refrigerant flow of R-134a.
Used to switch the operation mode between heating and defrost. Not activated during
Y1R
heating (opposite concerning outdoor unit).
K1S
Used to switch over between space heating and domestic hot water.
Q2L
Used to protect the water system against high temperatures.
Inverter compressor is operated on frequencies between 40 Hz and 210 Hz by using the
M1C
inverter. Max. of 30 steps.
M1P
Used to regulate water flow to achieve a constant ∆T.
Major Function
Piping Diagrams
221
Table of Contents
Troubleshooting
