I have a HM520, that had a refrigerant leak. Had unit repaired and refilled, but now I am getting a E01. I don't have a good service manual, but what I have says it is a power failure. If anyone has a copy of the manual or can give me a hand. Let me know
Thanks
Hi
I found this, for the model 525, maybe could help you:
Error code E-01
The error code E-01 is shown on the left display (fig. 19.10) and indicates that there is a
malfunction in the power electronics of the instrument.
In this case, the windings of the stepping motor can be defective.
Another possibility could be a defective control board. The proper functioning of this board is
controlled by the green LED on this board. An inactive LED shows that either the board itself
is defective or that there is a disturbance in the power supply (see exchanging the control
power board part 9-4-3).
When the supply voltage (24 VAC) on CONN 6 of the CPU board or the supply voltage
(28,5 - 32,5 VDC) of the stepping motor power control board (CONN 3, pin 7 and 8 on CPU
board) is missing, this is shown as error code E-01 on the display. Please check the voltage
supply.
