Seiko OC CS 6060 IP-6600 User Manual page 162

<Rear heater thermistor cannot reach the preset temperature even after
15 minutes.>
<Print heater thermistor cannot reach the preset temperature even after
15 minutes.>
<Switch test error occurs in the diagnostics >
<Zero cross error occurs in the diagnostics.>
4-10
ERROR H07
R TEMPERR
ERROR H08
P TEMPERR
ERROR H09
SWITCH ERROR
ERROR H10
ZERO CROSS ERROR