Block And Errors - Error Indication (Short Reference); Operation Indication - Rinnai Q series Troubleshooting Manual

Block and Errors - Error indication (short reference)

A detected error is indicated on the display by means of a blocking or error messages. A distinction should be made between
these two messages due to the fact that a blocking code can be of a temporary nature, however, error messages are fixed
"lockouts" or hard lockouts. The control will try its utmost to prevent a lockout and will temporary switch off the unit by blocking it,
below is a list of some messages the unit will display.
Blocks: bL with a number in the last two positions indicates the type of blocking code.
bL 01 Block 01: External safety contact cut off.
bL 05 Block 05: Outdoor reset sensor not connected.
bL 60 Block 60: Incorrect parameter setting of the minimum or maximum power (Btu) of boiler.
bL 67 Block 67: A T has been detected between flow and the return sensor whereas the burner is not in operation. After the
T has disappeared the block will clear itself.
bL 85 Block 85: The control has not detected water flow. The venting cycle (pro-purge) cycle has started.
If during this cycle water flow is detected, the pro-purge cycle stops, the burner will then fire up.
Error: E with a number in the last two positions indicates the type of error code.
E 00 Error 00: Poor flame forming.
E 02 Error 02: No flame forming.
E 04 Error 04: Adjustment or error due to voltage interruption.
E 05 Error 05: Adjustment.
E 12 Error 12: High limit stat.
E 18 Error 18: Maximum flow temperature exceeded.
E 19 Error 19: Maximum return water temperature exceeded.
E 28 Error 28: Fan revolutions not being measured by control board.
ground, and flame sensing wire disconnected during off cycle.
E 69 Error 69: No or incorrect display.
FUSE FUSE: 24 V fuse defective or blown.
Information displayed in "Tech Readout Mode". To enter this
mode press and hold the "STEP" button for 5 seconds.

Operation Indication

0 - No heat demand
1 - Fan pre/post purge
2 - Ignition phase
3 - Burner active on central heating
4 - Burner active on DHW
5 - Fan check
6 - Burner off when either DHW or room thermostat is calling *
(See note 2 below).
7- Pump overrun phase for central heating
8- Pump overrun phase for hot water
9 - Burner off because of too high flow temperature
A - Automatic de-aeration program
F – Fan test still activated in Service mode
H Burner test still activated in Service mode
*Note 2; (E Boiler) a continuous code 6 can mean there is a small hot
water leak triggering the plate heat exchanger sensor to call continually
for DHW in turn locking out space heating in DHW priority. Switch PARA
36 to 20 (flow switch only) and then repair leak.
Flame present when burner is off, electrical interference, poor
NOTE; if the unit appears to be fine but doesn't run
and no error code is displayed check;
a. That the desired programming is on; set to
either Central Heating and/or Domestic Hot
Water.
The unit is not in the Showroom Mode
b.
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Explanation of T Sensors:
T1- Supply sensor - Water leaving heat exchanger
mounts in flow of water.
T2 - Return water sensor, surface mounted.
T3 - Domestic hot water flow sensor,. Q175C uses
a surface mount sensor. Q models with optional 3-
way valve use a sensor designed to be used in a
well. (QP uses a well)
T4 – Outdoor reset sensor, mounted outside
building.
T5 - Flue gas sensor - Optional sensor not included
with boiler.
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