Safety Devices; Error Code - Val6 FIR-X5 Maintenance Manual

2

【Safety Devices】

Safety Devices
Flame detection（Misfire） When the heater cannot detect a ignition during operation.
When the heater detects a out of fuel at the beginning
of operation.
Low fuel
When it pasted 60 minutes after the heater detects
a out of fuel.
Overheat protection When the heater overheats.
Tip-over When the heater detects a vibration or an impacts.
Abnormal fan speed When the heater detects an abnormal fan speed.
When the heater detects a high voltage(about 145V) at
High voltage
the beginning of the operation.
When the heater detects a low voltage(about 70V) at the
Low voltage stop
during of the operation.
3 consecutive misfire When there are three consecutive misfire.
Circuitboard communication When a communication between the control board and the
abnomality operation board fails.
When the heater detects low voltage (about 90V) during
Low voltage detection
the operation.
When the power supply is restored after it shuts down
Power outage safety device
during operation because of blackout or other reason.
3

【Error Code】

Display Safety device
A1 Flame detection
A2 Low fuel
A3 Overheat
A4 Tip-over
A5 Abnormal fan speed
A6 Low voltage stop
A7 3 consecutive misfire
A8 Circuitboard communication abnomality
HV High voltage
LV Low voltage detection
※Refer to「7.Troubleshooting (P.6)」for countermeasure.
Detecting condition
When misfire occurs or flame goes out during the operation, the heater shuts
down automatically.
No fuel in the fuel tank.
When overheating is detected, the heater shuts down automatically.
When the heater receives a large vibration or shock, it shuts down
automatically.
When an abnormality of the combustion fan is detected during combustion,
the heater shuts down automatically.
When the supply voltage is about 70V or less, the heater shuts down
automatically.
When there are 3 consecutive misfire, the operation is prohibited
automatically.
When communication between the control board and the operation board
fails, the operation is prohibited automatically.
When the heater is connected to an abnormal high voltage, the operation is
prohibited automatically.
When the power supply volatage drops below appoximately 90volts during
operation, 「LV 」is displayed and the operation is continued.
3
Working condition after detecting
The error code「A1」is displayed and the fan cools down the heater for
about 5 minutes ( hereafter refferd to as Post-purge).
The error code「A2」is displayed .
The error code「A2」is displayed and Post-purge sequence runs for 5
minutes.
The error code「A3」is displayed and if the heater is operating , Post-
purge sequence will run for 5 minutes.
The error code「A4」is displayed and if the heater is operating, Post-purge
sequence will run for 5 minutes.
The error code 「A5」is displayed and if the heater is operating, Post-
purge sequence will run for 5 minutes.
The error code「HV」is displayed and the operation is prohibited.
The error code「A6」is displayed and if the heater is operating, Post-purge
sequence will run for 5 minutes.
There error code「A7」is displayed and the heater runs for 5 minutes.After
that the operation is pohibited.
The error code 「A8」is displayed and if the heater is operating, Post-
purge sequence will run for 5 minutes.
The error code「LV」is displayed and the operation is continued.
The error code「--」is displayed and the operation is prohibited.
Explanation