User`s guide

Chapter 5 ___________________________________________________________ Troubleshooting
VAISALA______________________________________________________________________ 189
When the measurement input is disabled:
- All other output values than status have undefined values.
- Sensor status shows disabled, refer to the updated list of the
sensor statuses in Table 14 on page 99.
- Value status shows INVALID and NOT AVAILABLE.
Battery Regulator
Power Supply
Table 30 on page 189 lists some common problems of WHP25 and their
remedies.
Replacing Fuses
Follow the procedure below to replace a broken fuse:
1. Remove the four screws attaching the cover of the WHP25 unit.
Remove the cover.
2. Disconnect the power input.
Table 29 Battery LEDs
LED Color Explanation
Battery status LED Green Charging
Blank Not charging
Charge LED Green OK
Orange Low
Red DC off
Table 30 Some Common Problems and their Remedies
Problem Probable Cause Remedy
No voltage between X5
and the grounding
crimp.
Fuse F1 is broken. Replace the fuse F1 as instructed in
section Replacing Fuses on page
189.
No voltage from the
24 VDC output.
Fuse F2 is broken Replace the fuse F2 as instructed in
section Replacing Fuses on page
189.
No voltage from the
36 VDC output.
Fuse R3 is broken. Send the unit to Vaisala for repair.