UTICA BOILERS MAC-150, Installation, Operation And Maintenance Manual

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13.1 Error Messages And Resetting The Boiler
Error Description Operation
09 Gas valve connection fault Check cable PCB/gas valve and gas valve plug
10 Outdoor sensor fault Check sensor and cable
15 Gas valve command fault
Verify all cables. Replace PCB.
Call authorized SERVICE center
20 Central Heating NTC sensor fault Check sensor and cable
28 Flue NTC heat exchanger sensor fault Check sensor and cable
40 Return NTC sensor fault Check sensor and cable
50 Domestic Hot Water NTC sensor fault Check sensor and cable
53
Obstruction in flue pipe, Recirculation, Out of
Calibration, Poor gas quality
Check for obstruction in flue pipe. Check for recirculation,
recalibrate, check gas quality
55 PCB not programmed Call authorized SERVICE center
83-84-85
86-87
Communication problem between boiler board and
control unit
Probable short circuit on wiring.
Check cable between control unit and boiler
109 Pre-circulation alarm (temporary fault)
Check correct circulation of water and pump. Check supply
and return wiring is correct.
110
Safety thermostat tripped due to over temperature
(pump probably blocked or air in heating circuit)
Check safety thermostat and cable; check correct circulation
of water and pump
118 Hydraulic pressure too low. Refill heating system by opening cold water tap
117 Hydraulic pressure too high.
Relieve pressure via relief valve or drain. Ensure water feed
is operating correctly.
125
No circulation of water
(control performed via temperature sensor).
Check correct circulation of water and pump.
Check correct connection of NTC sensor on pipe
128
Loss of flame
Check sensing electrode and cable, flue recirculation,
electrical continuity between burner and ground.
Enable automatic calibration.
Call authorized SERVICE center.
130 NTC flue sensor tripped due to over temperature
Check thermostat, correct circulation of water and pump.
Check status of primary exchanger.
131
Thermo fuse tripped due to over temperature or
wire harness disconnected from thermo fuse, off
the board, or wire harness may be cut.
Check thermo fuse, correct circulation of water and
pump. Check status of primary exchanger. Replace
heat exchanger. Call authorized SERVICE center.
Verify wire harness installation and continuity.
133
Ignition failure
Check correct operation of condensate trap.
Check sensing electrode, spark electrode and cable.
Check flue recirculation, electrical continuity between
burner and ground. Enable automatic calibration function.
Call authorized SERVICE center
134 Gas supply valve blocked
Check gas pressure, sensing electrode, spark
electrode and cable, replace PCB if it necessary.
Call authorized SERVICE center
135 Internal error
Verify all cables. Replace PCB.
Call authorized SERVICE center
160 Fan fault Check fan and cable
162/317 Incorrect power supply frequency. Incorrect power supply frequency.
169 Flue pressure switch (contact open)
Check pressure switch and cable.
Check obstruction on flue pipe
164/384 Fault flame (parasitic flame). Check correct operation of T. gas valve.
165/385 Input voltage too low. Check power supply
To RESET boiler press button for at least 2 seconds.
For other error codes not described in table please contact
manufacturer at 1(800) 325-5479.
13 - TROUBLE SHOOTING
240011941 REV B, [03/31/2018]