Nortec NH Series - Manual (Page 57)

Troubleshooting | 54
Table 14: Troubleshooting errors and warnings (continued)
Malfunction / Indication Cause Remedy
Max. Boil down rate too long
Error code: 4A/4B
Error4B
SteamtimeAlarm
4Asteamtime
Individual heating elements faulty. Replace faulty heating elements.
Main voltage too low or failure of
a phase (L1, L2 or L3).
Replace fuses on power board.
Check main voltage and
connections.
Steam line too long or not
insulated.
Maintain maximum line lengths
(max. 15’). Insulate steam lines.
Max. Drain time exceeded
Error code: 5A/5B
Alarm5Adrain
Error5Bdrain
Drain pump not connected or
faulty.
Connect or replace drain pump.
Outlet line from unit kinked or
blocked.
Inspect outlet line from unit,
replace if necessary.
Water outlet blocked (external
outlet line or siphon blocked.
Clean water outlet line and
siphon.
Hose to level unit blocked. Clean or replace hose.
Invalid level
Error code: 6A/6B
Alarm6A
Levelindicat
Error6B
levelindicat
Level unit faulty. Replace level unit.
Magnetic field in vicinity of level
unit.
Eliminate magnetic field.
Steam pressure (error only)
Error code: 7A/7B
Alarm7A
communication
Steam hose blocked or restricted
(water trap).
Inspect steam hose, clean if
necessary and install correctly.
Pressure balance adapter into
steam connection fitting blocked.
Remove adapter and clean
opening with a needle.
Duct pressure too high
(>1500 Pa).
Inspect ventilation settings.
External safety chain
interrupted Error code: none
SafetychainexternalA
Mainsfailure B
Ventilator lock open.
Switch on ventilator/ventilation
system.
Automatic flow control has
responded.
Inspect ventilator/filter of
ventilation system.
Safeties are open.
Servicing, inspect system if
necessary.
Main failure on Unit B. Inspect voltage supply to Unit B.