Installation / Operation Instruction Manual

Page 88
49 24 VAC voltage low/high H 1. Check the module and display connections.
2. Check the module power supply and make
sure that frequency, voltage and VA meet the
specifi cations.
50 Modulation fault H Internal sub-system fault.
1. Review alert messages for possible trends.
2. Correct possible problems.
51 Pump fault H Internal sub-system fault.
1. Review alert messages for possible trends.
2. Correct possible problems.
52 Motor tachometer fault H Internal sub-system fault.
1. Review alert messages for possible trends.
2. Correct possible problems.
53 AC input phases reversed L 1. Check the module and display connections.
2. Check the module power supply and make
sure that both frequency and voltage meet
the specifi cations.
3. On 24 VAC applications, assure that J4
terminal 10 and J8 terminal 2 are connected
together.
59 Internal Fault: Mux pin shorted L Internal Fault.
1. Reset module.
2. If fault repeats, replace module.
61 Anti short cycle H
Will not be a lockout fault. Hold Only.
62 Fan speed not proved H
63
Rollout switch, is regarding the
SAFETY CHAIN (OFF)
Could be one of the following:
Flow Switch (Standard Equipment
Sizes 399 and Up)
Additional High Limit (Field Supplied)
Optional Pressure Switch (Size 399
Only)
Low Water Cut Off (Standard
Equipment on All CSD-1 Models)
Low Gas Pressure Switch – Inlet
Side of Gas Valve (Standard
Equipment on All CSD-1 Models)
High Gas Pressure Switch – Outlet
Side of Gas Valve (Standard
Equipment on All CSD-1 Models)
Condensate Level Switch – All
Models
H
1. Reset the low gas pressure valve and the high
gas pressure valve.
2. Check for power at Terminal Block 8 (TB8 for
the ‘Safety Chain’ components.
3. Check wiring and correct any faults.
4. Check all safety interlocks connected to the
safety circuit to assure proper function.
5. If code persists, contact Tech Support.
Code Description Lockout
or Hold
Procedure
B RADFORD W HITE