TeeJet LH 1600M - Manual (Page 16)

LH 1600M O PERATORS MANUAL
16 LH A GRO
ERROR INDICATION
To ensure correct operation the LH 1600M has a built in error indication:
If your LH 1600M displays this error indication, it is due to the supply voltage to the
monitor being too low. Check the supply cables (+ and -).